oracle2

已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> show user;
User is "scott"

SQL> show user
User is "scott"

SQL> show
SQL> user
  2  show user;

user
show user

ORA-00900: 无效 SQL 语句

SQL> show user;
User is "scott"

SQL> alter user scott identified by 123;

用户已改变

SQL> show user
User is "scott"

SQL> conn scott/LIjun521
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> alter scott identified LIjun521;

alter scott identified LIjun521

ORA-00940: 无效的 ALTER 命令

SQL> alter user scott identified LIjun521;

alter user scott identified LIjun521

ORA-00924: 缺失 BY 关键字

SQL> alter scott identified by LIjun521;

alter scott identified by LIjun521

ORA-00940: 无效的 ALTER 命令

SQL> alter user scott identified by LIjun521;

用户已改变

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> edit
SQL> @d:123.tex;
读文件错误

SQL> start d:123.txt
User is "scott"

SQL> start d:123.txt;
User is "scott"

SQL> @d:123.txt;
User is "scott"

SQL> edit d:123.txt
未知的对象: d:123.txt

SQL> edit d:123.sql;
未知的对象: d:123.sql

SQL> @d:123.sql;
User is "scott"

SQL> edit d:123.sql;
未知的对象: d:123.sql

SQL> edit d:\123.sql;
未知的对象: d:\123.sql

SQL> spool d:bb.sql;
被开始脱机到 d:bb.sql

SQL> edit d:bb.sql;
未知的对象: d:bb.sql

SQL> select *from emp;

EMPNO ENAME      JOB         MGR HIREDATE          SAL      COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
 7369 SMITH      CLERK      7902 1980-12-17     800.00               20
 7499 ALLEN      SALESMAN   7698 1981-2-20     1600.00    300.00     30
 7521 WARD       SALESMAN   7698 1981-2-22     1250.00    500.00     30
 7566 JONES      MANAGER    7839 1981-4-2      2975.00               20
 7654 MARTIN     SALESMAN   7698 1981-9-28     1250.00   1400.00     30
 7698 BLAKE      MANAGER    7839 1981-5-1      2850.00               30
 7782 CLARK      MANAGER    7839 1981-6-9      2450.00               10
 7788 SCOTT      ANALYST    7566 1987-4-19     3000.00               20
 7839 KING       PRESIDENT       1981-11-17    5000.00               10
 7844 TURNER     SALESMAN   7698 1981-9-8      1500.00      0.00     30
 7876 ADAMS      CLERK      7788 1987-5-23     1100.00               20
 7900 JAMES      CLERK      7698 1981-12-3      950.00               30
 7902 FORD       ANALYST    7566 1981-12-3     3000.00               20
 7934 MILLER     CLERK      7782 1982-1-23     1300.00               10

14 行 已选择

SQL> spool d:bb.sql;
被停止脱机到 d:bb.sql
被开始脱机到 d:bb.sql

SQL> select *from emp;

EMPNO ENAME      JOB         MGR HIREDATE          SAL      COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
 7369 SMITH      CLERK      7902 1980-12-17     800.00               20
 7499 ALLEN      SALESMAN   7698 1981-2-20     1600.00    300.00     30
 7521 WARD       SALESMAN   7698 1981-2-22     1250.00    500.00     30
 7566 JONES      MANAGER    7839 1981-4-2      2975.00               20
 7654 MARTIN     SALESMAN   7698 1981-9-28     1250.00   1400.00     30
 7698 BLAKE      MANAGER    7839 1981-5-1      2850.00               30
 7782 CLARK      MANAGER    7839 1981-6-9      2450.00               10
 7788 SCOTT      ANALYST    7566 1987-4-19     3000.00               20
 7839 KING       PRESIDENT       1981-11-17    5000.00               10
 7844 TURNER     SALESMAN   7698 1981-9-8      1500.00      0.00     30
 7876 ADAMS      CLERK      7788 1987-5-23     1100.00               20
 7900 JAMES      CLERK      7698 1981-12-3      950.00               30
 7902 FORD       ANALYST    7566 1981-12-3     3000.00               20
 7934 MILLER     CLERK      7782 1982-1-23     1300.00               10

14 行 已选择

SQL> spool off;
被停止脱机到 d:bb.sql

SQL> select*from dept;

DEPTNO DNAME          LOC
------ -------------- -------------
    10 ACCOUNTING     NEW YORK
    20 RESEARCH       DALLAS
    30 SALES          CHICAGO
    40 OPERATIONS     BOSTON

SQL> spool d:bb.sql;
被开始脱机到 d:bb.sql

SQL> select*from dept;

DEPTNO DNAME          LOC
------ -------------- -------------
    10 ACCOUNTING     NEW YORK
    20 RESEARCH       DALLAS
    30 SALES          CHICAGO
    40 OPERATIONS     BOSTON

SQL> spool off;
被停止脱机到 d:bb.sql

SQL> edit d:bb.sql;
未知的对象: d:bb.sql

SQL> @d:bb.sql;
  7 
SQL> @d:123.sql;
User is "scott"

SQL> show user;
User is "scott"

SQL>
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> creat user xiaogang identified by 123;

creat user xiaogang identified by 123

ORA-00900: 无效 SQL 语句

SQL> create user xiaogang identified by 123;

create user xiaogang identified by 123

ORA-01031: 权限不足

SQL> create user xiaogang identified by m123;

create user xiaogang identified by m123

ORA-01031: 权限不足

SQL> conn system/LIjun521
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 system

SQL> create user xiaogang identified by 123;

用户被创建

SQL> password xiaogang;
SQL> alter user xiaogang identified by LIjun521;

用户已改变

SQL> show user;
User is "system"

SQL> conn xiaogang/LIjun521;
没有登录

SQL> conn system/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 system

SQL> drop user xiaogang;

用户被删掉

SQL> show user'
SQL> show user;
User is "system"

SQL> create user xiaogang identified by 123;

用户被创建

SQL> grant connect to xiaogang;

授予成功

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL>
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select *from emp;

select *from emp

ORA-00942: 表或视图不存在

SQL> conn xiaoming/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaoming

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> conn system/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 system

SQL> grant resource to xiaogang;

授予成功

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> create table test(userId varchar2(30),userName varchar2(30));

表被创建

SQL> conn xiaoming/LIjun521;
没有登录

SQL> conn xiaoming/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaoming

SQL> create table test(userId varchar2(30),userName varchar2(30));

create table test(userId varchar2(30),userName varchar2(30))

ORA-00955: 名称已由现有对象使用

SQL> create table test1(userId varchar2(30),userName varchar2(30));

表被创建

SQL> conn system/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 system

SQL> create user xiaojun identified by 123;

用户被创建

SQL> conn xiaojun/123;
没有登录

SQL> conn system/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 system

SQL> grant conn to xiaojun;

grant conn to xiaojun

ORA-01919: 角色 'CONN' 不存在

SQL> grant connect to xiaojun;

授予成功

SQL> conn xiaojun/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaojun

SQL> create table test2(userId varchar2(30),userName varchar2(30));

create table test2(userId varchar2(30),userName varchar2(30))

ORA-01031: 权限不足

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select *from text;

select *from text

ORA-00942: 表或视图不存在

SQL> select *from test;

USERID                         USERNAME
------------------------------ ------------------------------

SQL> desc test;
Name     Type         Nullable Default Comments
-------- ------------ -------- ------- --------
USERID   VARCHAR2(30) Y                        
USERNAME VARCHAR2(30) Y                        

SQL> select *from emp;

select *from emp

ORA-00942: 表或视图不存在

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> grant select on emp to xiaogang;

授予成功

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select *from emp;

select *from emp

ORA-00942: 表或视图不存在

SQL> select*from emp on scott;

select*from emp on scott

ORA-00933: SQL 命令未正确结束

SQL> select*from emp scott.emp
  2  select*from emp scott.emp;

select*from emp scott.emp
select*from emp scott.emp

ORA-00933: SQL 命令未正确结束

SQL> select*from emp scott.emp;

select*from emp scott.emp

ORA-00933: SQL 命令未正确结束

SQL> select * from emp scott.emp;

select * from emp scott.emp

ORA-00933: SQL 命令未正确结束

SQL> select * from  scott.emp;

EMPNO ENAME      JOB         MGR HIREDATE          SAL      COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
 7369 SMITH      CLERK      7902 1980-12-17     800.00               20
 7499 ALLEN      SALESMAN   7698 1981-2-20     1600.00    300.00     30
 7521 WARD       SALESMAN   7698 1981-2-22     1250.00    500.00     30
 7566 JONES      MANAGER    7839 1981-4-2      2975.00               20
 7654 MARTIN     SALESMAN   7698 1981-9-28     1250.00   1400.00     30
 7698 BLAKE      MANAGER    7839 1981-5-1      2850.00               30
 7782 CLARK      MANAGER    7839 1981-6-9      2450.00               10
 7788 SCOTT      ANALYST    7566 1987-4-19     3000.00               20
 7839 KING       PRESIDENT       1981-11-17    5000.00               10
 7844 TURNER     SALESMAN   7698 1981-9-8      1500.00      0.00     30
 7876 ADAMS      CLERK      7788 1987-5-23     1100.00               20
 7900 JAMES      CLERK      7698 1981-12-3      950.00               30
 7902 FORD       ANALYST    7566 1981-12-3     3000.00               20
 7934 MILLER     CLERK      7782 1982-1-23     1300.00               10

14 行 已选择

SQL> creat table test(userID varchar2(30),userName varchar2(30));

creat table test(userID varchar2(30),userName varchar2(30))

ORA-00900: 无效 SQL 语句

SQL> create table test(userID varchar2(30),userName varchar2(30));

create table test(userID varchar2(30),userName varchar2(30))

ORA-00955: 名称已由现有对象使用

SQL> create table emp(userID varchar2(30),userName varchar2(30));

表被创建

SQL> show user
User is "xiaogang"

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> grant update on emp to xiaogang;

授予成功

SQL> grant all on emp to xiaogang;

授予成功

SQL> revoke select on emp to xiaogang;

revoke select on emp to xiaogang

ORA-00905: 缺失关键字

SQL> revoke select on emp from xiaogang;

撤回成功

SQL> revoke update on emp from xiaogang;

撤回成功

SQL> revoke all on emp from xiaogang;

撤回成功

SQL> conn xiaogang /123;
没有登录

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select*from scott.emp;

select*from scott.emp

ORA-00942: 表或视图不存在

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> grant select on emp to xiaogang;

授予成功

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select*from scott.emp;

EMPNO ENAME      JOB         MGR HIREDATE          SAL      COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
 7369 SMITH      CLERK      7902 1980-12-17     800.00               20
 7499 ALLEN      SALESMAN   7698 1981-2-20     1600.00    300.00     30
 7521 WARD       SALESMAN   7698 1981-2-22     1250.00    500.00     30
 7566 JONES      MANAGER    7839 1981-4-2      2975.00               20
 7654 MARTIN     SALESMAN   7698 1981-9-28     1250.00   1400.00     30
 7698 BLAKE      MANAGER    7839 1981-5-1      2850.00               30
 7782 CLARK      MANAGER    7839 1981-6-9      2450.00               10
 7788 SCOTT      ANALYST    7566 1987-4-19     3000.00               20
 7839 KING       PRESIDENT       1981-11-17    5000.00               10
 7844 TURNER     SALESMAN   7698 1981-9-8      1500.00      0.00     30
 7876 ADAMS      CLERK      7788 1987-5-23     1100.00               20
 7900 JAMES      CLERK      7698 1981-12-3      950.00               30
 7902 FORD       ANALYST    7566 1981-12-3     3000.00               20
 7934 MILLER     CLERK      7782 1982-1-23     1300.00               10

14 行 已选择

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> revoke select on emp from xiaogang;

撤回成功

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select*from scott.emp;

select*from scott.emp

ORA-00942: 表或视图不存在

SQL> select*from scott.emp;

select*from scott.emp

ORA-00942: 表或视图不存在

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> grant select on emp to xiaogang with grant option;

授予成功

SQL> conn xiaojun/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaojun

SQL> select *from scott.emp;

select *from scott.emp

ORA-00942: 表或视图不存在

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> grant select on scott.emp to xiaojun;

授予成功

SQL> conn xiaojun/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaojun

SQL> select *from scott.emp;

EMPNO ENAME      JOB         MGR HIREDATE          SAL      COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
 7369 SMITH      CLERK      7902 1980-12-17     800.00               20
 7499 ALLEN      SALESMAN   7698 1981-2-20     1600.00    300.00     30
 7521 WARD       SALESMAN   7698 1981-2-22     1250.00    500.00     30
 7566 JONES      MANAGER    7839 1981-4-2      2975.00               20
 7654 MARTIN     SALESMAN   7698 1981-9-28     1250.00   1400.00     30
 7698 BLAKE      MANAGER    7839 1981-5-1      2850.00               30
 7782 CLARK      MANAGER    7839 1981-6-9      2450.00               10
 7788 SCOTT      ANALYST    7566 1987-4-19     3000.00               20
 7839 KING       PRESIDENT       1981-11-17    5000.00               10
 7844 TURNER     SALESMAN   7698 1981-9-8      1500.00      0.00     30
 7876 ADAMS      CLERK      7788 1987-5-23     1100.00               20
 7900 JAMES      CLERK      7698 1981-12-3      950.00               30
 7902 FORD       ANALYST    7566 1981-12-3     3000.00               20
 7934 MILLER     CLERK      7782 1982-1-23     1300.00               10

14 行 已选择

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> revoke select on emp from xiaogang;

撤回成功

SQL> conn xiaojun/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaojun

SQL> select*from scott.emp;

select*from scott.emp

ORA-00942: 表或视图不存在

SQL> show user;
User is "xiaojun"

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select*from scott.emp;

select*from scott.emp

ORA-00942: 表或视图不存在

SQL>
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select *from emp;

select *from emp

ORA-00942: 表或视图不存在

SQL> conn xiaoming/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaoming

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> conn system/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 system

SQL> grant resource to xiaogang;

授予成功

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> create table test(userId varchar2(30),userName varchar2(30));

表被创建

SQL> conn xiaoming/LIjun521;
没有登录

SQL> conn xiaoming/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaoming

SQL> create table test(userId varchar2(30),userName varchar2(30));

create table test(userId varchar2(30),userName varchar2(30))

ORA-00955: 名称已由现有对象使用

SQL> create table test1(userId varchar2(30),userName varchar2(30));

表被创建

SQL> conn system/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 system

SQL> create user xiaojun identified by 123;

用户被创建

SQL> conn xiaojun/123;
没有登录

SQL> conn system/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 system

SQL> grant conn to xiaojun;

grant conn to xiaojun

ORA-01919: 角色 'CONN' 不存在

SQL> grant connect to xiaojun;

授予成功

SQL> conn xiaojun/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaojun

SQL> create table test2(userId varchar2(30),userName varchar2(30));

create table test2(userId varchar2(30),userName varchar2(30))

ORA-01031: 权限不足

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select *from text;

select *from text

ORA-00942: 表或视图不存在

SQL> select *from test;

USERID                         USERNAME
------------------------------ ------------------------------

SQL> desc test;
Name     Type         Nullable Default Comments
-------- ------------ -------- ------- --------
USERID   VARCHAR2(30) Y                        
USERNAME VARCHAR2(30) Y                        

SQL> select *from emp;

select *from emp

ORA-00942: 表或视图不存在

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> grant select on emp to xiaogang;

授予成功

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select *from emp;

select *from emp

ORA-00942: 表或视图不存在

SQL> select*from emp on scott;

select*from emp on scott

ORA-00933: SQL 命令未正确结束

SQL> select*from emp scott.emp
  2  select*from emp scott.emp;

select*from emp scott.emp
select*from emp scott.emp

ORA-00933: SQL 命令未正确结束

SQL> select*from emp scott.emp;

select*from emp scott.emp

ORA-00933: SQL 命令未正确结束

SQL> select * from emp scott.emp;

select * from emp scott.emp

ORA-00933: SQL 命令未正确结束

SQL> select * from  scott.emp;

EMPNO ENAME      JOB         MGR HIREDATE          SAL      COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
 7369 SMITH      CLERK      7902 1980-12-17     800.00               20
 7499 ALLEN      SALESMAN   7698 1981-2-20     1600.00    300.00     30
 7521 WARD       SALESMAN   7698 1981-2-22     1250.00    500.00     30
 7566 JONES      MANAGER    7839 1981-4-2      2975.00               20
 7654 MARTIN     SALESMAN   7698 1981-9-28     1250.00   1400.00     30
 7698 BLAKE      MANAGER    7839 1981-5-1      2850.00               30
 7782 CLARK      MANAGER    7839 1981-6-9      2450.00               10
 7788 SCOTT      ANALYST    7566 1987-4-19     3000.00               20
 7839 KING       PRESIDENT       1981-11-17    5000.00               10
 7844 TURNER     SALESMAN   7698 1981-9-8      1500.00      0.00     30
 7876 ADAMS      CLERK      7788 1987-5-23     1100.00               20
 7900 JAMES      CLERK      7698 1981-12-3      950.00               30
 7902 FORD       ANALYST    7566 1981-12-3     3000.00               20
 7934 MILLER     CLERK      7782 1982-1-23     1300.00               10

14 行 已选择

SQL> creat table test(userID varchar2(30),userName varchar2(30));

creat table test(userID varchar2(30),userName varchar2(30))

ORA-00900: 无效 SQL 语句

SQL> create table test(userID varchar2(30),userName varchar2(30));

create table test(userID varchar2(30),userName varchar2(30))

ORA-00955: 名称已由现有对象使用

SQL> create table emp(userID varchar2(30),userName varchar2(30));

表被创建

SQL> show user
User is "xiaogang"

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> grant update on emp to xiaogang;

授予成功

SQL> grant all on emp to xiaogang;

授予成功

SQL> revoke select on emp to xiaogang;

revoke select on emp to xiaogang

ORA-00905: 缺失关键字

SQL> revoke select on emp from xiaogang;

撤回成功

SQL> revoke update on emp from xiaogang;

撤回成功

SQL> revoke all on emp from xiaogang;

撤回成功

SQL> conn xiaogang /123;
没有登录

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select*from scott.emp;

select*from scott.emp

ORA-00942: 表或视图不存在

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> grant select on emp to xiaogang;

授予成功

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select*from scott.emp;

EMPNO ENAME      JOB         MGR HIREDATE          SAL      COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
 7369 SMITH      CLERK      7902 1980-12-17     800.00               20
 7499 ALLEN      SALESMAN   7698 1981-2-20     1600.00    300.00     30
 7521 WARD       SALESMAN   7698 1981-2-22     1250.00    500.00     30
 7566 JONES      MANAGER    7839 1981-4-2      2975.00               20
 7654 MARTIN     SALESMAN   7698 1981-9-28     1250.00   1400.00     30
 7698 BLAKE      MANAGER    7839 1981-5-1      2850.00               30
 7782 CLARK      MANAGER    7839 1981-6-9      2450.00               10
 7788 SCOTT      ANALYST    7566 1987-4-19     3000.00               20
 7839 KING       PRESIDENT       1981-11-17    5000.00               10
 7844 TURNER     SALESMAN   7698 1981-9-8      1500.00      0.00     30
 7876 ADAMS      CLERK      7788 1987-5-23     1100.00               20
 7900 JAMES      CLERK      7698 1981-12-3      950.00               30
 7902 FORD       ANALYST    7566 1981-12-3     3000.00               20
 7934 MILLER     CLERK      7782 1982-1-23     1300.00               10

14 行 已选择

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> revoke select on emp from xiaogang;

撤回成功

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select*from scott.emp;

select*from scott.emp

ORA-00942: 表或视图不存在

SQL> select*from scott.emp;

select*from scott.emp

ORA-00942: 表或视图不存在

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> grant select on emp to xiaogang with grant option;

授予成功

SQL> conn xiaojun/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaojun

SQL> select *from scott.emp;

select *from scott.emp

ORA-00942: 表或视图不存在

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> grant select on scott.emp to xiaojun;

授予成功

SQL> conn xiaojun/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaojun

SQL> select *from scott.emp;

EMPNO ENAME      JOB         MGR HIREDATE          SAL      COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
 7369 SMITH      CLERK      7902 1980-12-17     800.00               20
 7499 ALLEN      SALESMAN   7698 1981-2-20     1600.00    300.00     30
 7521 WARD       SALESMAN   7698 1981-2-22     1250.00    500.00     30
 7566 JONES      MANAGER    7839 1981-4-2      2975.00               20
 7654 MARTIN     SALESMAN   7698 1981-9-28     1250.00   1400.00     30
 7698 BLAKE      MANAGER    7839 1981-5-1      2850.00               30
 7782 CLARK      MANAGER    7839 1981-6-9      2450.00               10
 7788 SCOTT      ANALYST    7566 1987-4-19     3000.00               20
 7839 KING       PRESIDENT       1981-11-17    5000.00               10
 7844 TURNER     SALESMAN   7698 1981-9-8      1500.00      0.00     30
 7876 ADAMS      CLERK      7788 1987-5-23     1100.00               20
 7900 JAMES      CLERK      7698 1981-12-3      950.00               30
 7902 FORD       ANALYST    7566 1981-12-3     3000.00               20
 7934 MILLER     CLERK      7782 1982-1-23     1300.00               10

14 行 已选择

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> revoke select on emp from xiaogang;

撤回成功

SQL> conn xiaojun/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaojun

SQL> select*from scott.emp;

select*from scott.emp

ORA-00942: 表或视图不存在

SQL> show user;
User is "xiaojun"

SQL> conn xiaogang/123;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 xiaogang

SQL> select*from scott.emp;

select*from scott.emp

ORA-00942: 表或视图不存在

SQL>
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 system

SQL> create profile www limit failed_login_attempts 3 password_lock_time 2;

配置文件被创建

SQL> alter user scott profile www;

用户已改变

SQL> create profile wwww limit password_life_time 10 password_grace_time 2;

配置文件被创建

SQL> alter user scott profile wwww;

用户已改变

SQL> create profile ssss limit password_life_time 10 password_grace_time 2 password_reuse_time 10;

配置文件被创建

SQL> alter user scott profile ssss;

用户已改变

SQL> drop profile wwww;

配置文件被删掉

SQL>
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 system

SQL> conn scott/LIjun521;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> create table users(userName char(2001));

create table users(userName char(2001))

ORA-00910: 指定的长度对于数据类型而言过长

SQL> create table users(userName char(200));

表被创建

SQL> select*from users
  2  ;

USERNAME
--------------------------------------------------------------------------------

SQL> drop table users;

表被删掉

SQL> create table users(userName char(2000));

表被创建

SQL> create table users(userName char(2001));

create table users(userName char(2001))

ORA-00910: 指定的长度对于数据类型而言过长

SQL> create table users(userName char(2000));

create table users(userName char(2000))

ORA-00955: 名称已由现有对象使用

SQL> create table student(
  2  xh number(4),
  3  xm varchar2(20),
  4  xm varchar2(20),
  5  sex char(2),
  6  birthday date,
  7  sal number(7,2),
  8  );

create table student(
xh number(4),
xm varchar2(20),
xm varchar2(20),
sex char(2),
birthday date,
sal number(7,2),
)

ORA-00957: 重复的列名

SQL> create table student(
  2  xh number(4),
  3  xm varchar2(20),
  4  sex char(2),
  5  birthday date,
  6  sal number(7,2),
  7  );

create table student(
xh number(4),
xm varchar2(20),
sex char(2),
birthday date,
sal number(7,2),
)

ORA-00904: : 标识符无效

SQL>
SQL> create table student(
  2  xh number(4),
  3  xm varchar2(20),
  4  sex char(2),
  5  birthday date,
  6  sal number(7,2),
  7  )
  8  ;

create table student(
xh number(4),
xm varchar2(20),
sex char(2),
birthday date,
sal number(7,2),
)

ORA-00904: : 标识符无效

SQL>
SQL> create table student(
  2  xh number(4),
  3  xm varchar2(20),
  4  sex char(2),
  5  birthday date,
  6  sal number(7,2),
  7  )
  8 
SQL>
SQL>
SQL> create table student(
  2  xh number(4),
  3  xm varchar2(20),
  4  sex char(2),
  5  birthday date,
  6  sal number(7,2)
  7  );

create table student(
xh number(4),
xm varchar2(20),
sex char(2),
birthday date,
sal number(7,2)
)

ORA-00955: 名称已由现有对象使用

SQL> drop table student;

表被删掉

SQL>
SQL> create table student(
  2  xh number(4),
  3  xm varchar2(20),
  4  sex char(2),
  5  birthday date,
  6  sal number(7,2)
  7  )
  8 
SQL>
SQL>
SQL> create table student(
  2  xh number(4),
  3  xm varchar2(20),
  4  sex char(2),
  5  birthday date,
  6  sal number(7,2)
  7  );

表被创建

SQL> create table classes(
  2  classId number(2),
  3  cname varchar2(20)
  4  );

create table classes(
classId number(2),
cname varchar2(20)
)

ORA-00955: 名称已由现有对象使用

SQL> desc student;
Name     Type         Nullable Default Comments
-------- ------------ -------- ------- --------
XH       NUMBER(4)    Y                        
XM       VARCHAR2(20) Y                        
SEX      CHAR(2)      Y                        
BIRTHDAY DATE         Y                        
SAL      NUMBER(7,2)  Y                        

SQL> alter table student add(classId varchar(20));

表被改变

SQL> desc student
Name     Type         Nullable Default Comments
-------- ------------ -------- ------- --------
XH       NUMBER(4)    Y                        
XM       VARCHAR2(20) Y                        
SEX      CHAR(2)      Y                        
BIRTHDAY DATE         Y                        
SAL      NUMBER(7,2)  Y                        
CLASSID  VARCHAR2(20) Y                        

SQL> insert into student values(1,'小明','男','11-12月-1997',2345.23，'A102')
  2  ;

1 行 已插入

SQL> alter session set nls_date_format='yyyy-mm-dd';

会话被改变

SQL> insert into student values(1,'小明','男','1988-12-3',2345.23，'A102')
  2  ;

1 行 已插入

SQL> select*from student;

   XH XM                   SEX BIRTHDAY          SAL CLASSID
----- -------------------- --- ----------- --------- --------------------
    1 小明                 男  1997-12-11    2345.23 A102
    1 小明                 男  1988-12-3     2345.23 A102

SQL>
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> desc student;
Name     Type         Nullable Default Comments
-------- ------------ -------- ------- --------
XH       NUMBER(4)    Y                        
XM       VARCHAR2(20) Y                        
SEX      CHAR(2)      Y                        
BIRTHDAY DATE         Y                        
SAL      NUMBER(7,2)  Y                        
CLASSID  VARCHAR2(20) Y                        

SQL> insert into student(xh,xm,sex,birthday) values(3,'aa','女'，null);

1 行 已插入

SQL> select*from student;

   XH XM                   SEX BIRTHDAY          SAL CLASSID
----- -------------------- --- ----------- --------- --------------------
    1 小明                 男  1997-12-11    2345.23 A102
    1 小明                 男  1988-12-3     2345.23 A102
    3 aa                   女                       

SQL> select*from student where birthday=null;

   XH XM                   SEX BIRTHDAY          SAL CLASSID
----- -------------------- --- ----------- --------- --------------------

SQL> select*from student where birthday is null;

   XH XM                   SEX BIRTHDAY          SAL CLASSID
----- -------------------- --- ----------- --------- --------------------
    3 aa                   女                       

SQL> select*from student where birthday is not null;

   XH XM                   SEX BIRTHDAY          SAL CLASSID
----- -------------------- --- ----------- --------- --------------------
    1 小明                 男  1997-12-11    2345.23 A102
    1 小明                 男  1988-12-3     2345.23 A102

SQL> 已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> update student set sal=sal/2 where sex='男'
  2  ；
  3  select*from student;

update student set sal=sal/2 where sex='男'
；
select*from student

ORA-00911: 无效字符

SQL> desc student;
Name     Type         Nullable Default Comments
-------- ------------ -------- ------- --------
XH       NUMBER(4)    Y                        
XM       VARCHAR2(20) Y                        
SEX      CHAR(2)      Y                        
BIRTHDAY DATE         Y                        
SAL      NUMBER(7,2)  Y                        
CLASSID  VARCHAR2(20) Y                        

SQL> update student set sal=sal/2 where sex='男';

2 行 已更新

SQL> select*from student;

   XH XM                   SEX BIRTHDAY          SAL CLASSID
----- -------------------- --- ----------- --------- --------------------
    1 小明                 男  1997-12-11    1172.62 A102
    1 小明                 男  1988-12-3     1172.62 A102
    3 aa                   女                       

SQL> delete from student;

3 行 已删除

SQL> select*from student;

   XH XM                   SEX BIRTHDAY          SAL CLASSID
----- -------------------- --- ----------- --------- --------------------

SQL> rollback;

回滚完成

SQL> insert into student(xh,xm,sex,birthday) values(3,'aa','女'，null);

1 行 已插入

SQL> select*from student;

   XH XM                   SEX BIRTHDAY          SAL CLASSID
----- -------------------- --- ----------- --------- --------------------
    3 aa                   女                       

SQL> savepoint aa;

保存点被创建

SQL> delete from student;

1 行 已删除

SQL> select*from student;

   XH XM                   SEX BIRTHDAY          SAL CLASSID
----- -------------------- --- ----------- --------- --------------------

SQL> rollback to aa;

回滚完成

SQL> select*from student;

   XH XM                   SEX BIRTHDAY          SAL CLASSID
----- -------------------- --- ----------- --------- --------------------
    3 aa                   女                       

SQL>
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> select*from emp;

EMPNO ENAME      JOB         MGR HIREDATE          SAL      COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
 7369 SMITH      CLERK      7902 1980-12-17     800.00               20
 7499 ALLEN      SALESMAN   7698 1981-2-20     1600.00    300.00     30
 7521 WARD       SALESMAN   7698 1981-2-22     1250.00    500.00     30
 7566 JONES      MANAGER    7839 1981-4-2      2975.00               20
 7654 MARTIN     SALESMAN   7698 1981-9-28     1250.00   1400.00     30
 7698 BLAKE      MANAGER    7839 1981-5-1      2850.00               30
 7782 CLARK      MANAGER    7839 1981-6-9      2450.00               10
 7788 SCOTT      ANALYST    7566 1987-4-19     3000.00               20
 7839 KING       PRESIDENT       1981-11-17    5000.00               10
 7844 TURNER     SALESMAN   7698 1981-9-8      1500.00      0.00     30
 7876 ADAMS      CLERK      7788 1987-5-23     1100.00               20
 7900 JAMES      CLERK      7698 1981-12-3      950.00               30
 7902 FORD       ANALYST    7566 1981-12-3     3000.00               20
 7934 MILLER     CLERK      7782 1982-1-23     1300.00               10

14 行 已选择

SQL> desc dept;
Name   Type         Nullable Default Comments
------ ------------ -------- ------- --------
DEPTNO NUMBER(2)                             
DNAME  VARCHAR2(14) Y                        
LOC    VARCHAR2(13) Y                        

SQL> select ename,sal,job,deptno from emp;

ENAME            SAL JOB       DEPTNO
---------- --------- --------- ------
SMITH         800.00 CLERK         20
ALLEN        1600.00 SALESMAN      30
WARD         1250.00 SALESMAN      30
JONES        2975.00 MANAGER       20
MARTIN       1250.00 SALESMAN      30
BLAKE        2850.00 MANAGER       30
CLARK        2450.00 MANAGER       10
SCOTT        3000.00 ANALYST       20
KING         5000.00 PRESIDENT     10
TURNER       1500.00 SALESMAN      30
ADAMS        1100.00 CLERK         20
JAMES         950.00 CLERK         30
FORD         3000.00 ANALYST       20
MILLER       1300.00 CLERK         10

14 行 已选择

SQL> select distinct job,deptno from emp;

JOB       DEPTNO
--------- ------
MANAGER       20
PRESIDENT     10
CLERK         10
SALESMAN      30
ANALYST       20
MANAGER       30
MANAGER       10
CLERK         30
CLERK         20

9 行 已选择

SQL> set timing on;
SQL> select distinct job,deptno from emp;

JOB       DEPTNO
--------- ------
MANAGER       20
PRESIDENT     10
CLERK         10
SALESMAN      30
ANALYST       20
MANAGER       30
MANAGER       10
CLERK         30
CLERK         20

9 行 已选择

已执行耗时 0.109 秒

SQL> select ename,sal,job,deptno from emp;

ENAME            SAL JOB       DEPTNO
---------- --------- --------- ------
SMITH         800.00 CLERK         20
ALLEN        1600.00 SALESMAN      30
WARD         1250.00 SALESMAN      30
JONES        2975.00 MANAGER       20
MARTIN       1250.00 SALESMAN      30
BLAKE        2850.00 MANAGER       30
CLARK        2450.00 MANAGER       10
SCOTT        3000.00 ANALYST       20
KING         5000.00 PRESIDENT     10
TURNER       1500.00 SALESMAN      30
ADAMS        1100.00 CLERK         20
JAMES         950.00 CLERK         30
FORD         3000.00 ANALYST       20
MILLER       1300.00 CLERK         10

14 行 已选择

已执行耗时 0.157 秒

SQL> select*from emp;

EMPNO ENAME      JOB         MGR HIREDATE          SAL      COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
 7369 SMITH      CLERK      7902 1980-12-17     800.00               20
 7499 ALLEN      SALESMAN   7698 1981-2-20     1600.00    300.00     30
 7521 WARD       SALESMAN   7698 1981-2-22     1250.00    500.00     30
 7566 JONES      MANAGER    7839 1981-4-2      2975.00               20
 7654 MARTIN     SALESMAN   7698 1981-9-28     1250.00   1400.00     30
 7698 BLAKE      MANAGER    7839 1981-5-1      2850.00               30
 7782 CLARK      MANAGER    7839 1981-6-9      2450.00               10
 7788 SCOTT      ANALYST    7566 1987-4-19     3000.00               20
 7839 KING       PRESIDENT       1981-11-17    5000.00               10
 7844 TURNER     SALESMAN   7698 1981-9-8      1500.00      0.00     30
 7876 ADAMS      CLERK      7788 1987-5-23     1100.00               20
 7900 JAMES      CLERK      7698 1981-12-3      950.00               30
 7902 FORD       ANALYST    7566 1981-12-3     3000.00               20
 7934 MILLER     CLERK      7782 1982-1-23     1300.00               10

14 行 已选择

已执行耗时 0.187 秒

SQL> create table users1(userId varchar2(20),userName varchar2(30),userPss varchar2(30));

表被创建

已执行耗时 0.094 秒

SQL> insert into users1('a0001','韩顺平哈哈哈奥','shunping@sohu.com')
  2  ;

insert into users1('a0001','韩顺平哈哈哈奥','shunping@sohu.com')

ORA-00928: 缺失 SELECT 关键字

SQL> insert into users1 values('a0001','韩顺平哈哈哈奥','shunping@sohu.com');

1 行 已插入

已执行耗时 0.141 秒

SQL> select *from users1;

USERID               USERNAME                       USERPSS
-------------------- ------------------------------ ------------------------------
a0001                韩顺平哈哈哈奥                 shunping@sohu.com

已执行耗时 0.031 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

1 行 已插入

已执行耗时 0.047 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

2 行 已插入

已执行耗时 0.015 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

4 行 已插入

已执行耗时 0 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

8 行 已插入

已执行耗时 0.047 秒

SQL>
SQL> insert into users1(userId,userName,userPss) select*from users1;

16 行 已插入

已执行耗时 0 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

32 行 已插入

已执行耗时 0.016 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

64 行 已插入

已执行耗时 0.062 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

128 行 已插入

已执行耗时 0.062 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

256 行 已插入

已执行耗时 0.078 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

512 行 已插入

已执行耗时 0.14 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

1024 行 已插入

已执行耗时 0.062 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

2048 行 已插入

已执行耗时 0.203 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

4096 行 已插入

已执行耗时 0.344 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

8192 行 已插入

已执行耗时 0.281 秒

SQL>
SQL> insert into users1(userId,userName,userPss) select*from users1;
现在不能执行命令

SQL>

16384 行 已插入

已执行耗时 1.391 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

32768 行 已插入

已执行耗时 1 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

65536 行 已插入

已执行耗时 3 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

131072 行 已插入

已执行耗时 3.75 秒

SQL> insert into users1(userId,userName,userPss) select*from users1;

262144 行 已插入

已执行耗时 6.094 秒

SQL> select*from users
  2  ;

USERNAME
--------------------------------------------------------------------------------

已执行耗时 0.047 秒

SQL> select*from users1;
已连接到 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
已连接为 scott

SQL> select distinct job from emp;

JOB
---------
CLERK
SALESMAN
PRESIDENT
MANAGER
ANALYST

已执行耗时 0.031 秒

SQL> select distinct job,empno from emp;

JOB       EMPNO
--------- -----
CLERK      7369
SALESMAN   7499
SALESMAN   7521
MANAGER    7566
SALESMAN   7654
MANAGER    7698
MANAGER    7782
ANALYST    7788
PRESIDENT  7839
SALESMAN   7844
CLERK      7876
CLERK      7900
ANALYST    7902
CLERK      7934

14 行 已选择

已执行耗时 0.203 秒

SQL> select deptno,job from emp;

DEPTNO JOB
------ ---------
    20 CLERK
    30 SALESMAN
    30 SALESMAN
    20 MANAGER
    30 SALESMAN
    30 MANAGER
    10 MANAGER
    20 ANALYST
    10 PRESIDENT
    30 SALESMAN
    20 CLERK
    30 CLERK
    20 ANALYST
    10 CLERK

14 行 已选择

已执行耗时 0.125 秒

SQL> select distinct empno,job from emp;

EMPNO JOB
----- ---------
 7369 CLERK
 7499 SALESMAN
 7521 SALESMAN
 7566 MANAGER
 7654 SALESMAN
 7698 MANAGER
 7782 MANAGER
 7788 ANALYST
 7839 PRESIDENT
 7844 SALESMAN
 7876 CLERK
 7900 CLERK
 7902 ANALYST
 7934 CLERK

14 行 已选择

已执行耗时 0.141 秒

SQL> select distinct deptno,job from emp;

DEPTNO JOB
------ ---------
    20 CLERK
    30 SALESMAN
    20 MANAGER
    30 CLERK
    10 PRESIDENT
    30 MANAGER
    10 CLERK
    10 MANAGER
    20 ANALYST

9 行 已选择

已执行耗时 0.109 秒

SQL> desc dept;
Name   Type         Nullable Default Comments
------ ------------ -------- ------- --------
DEPTNO NUMBER(2)                             
DNAME  VARCHAR2(14) Y                        
LOC    VARCHAR2(13) Y                        

SQL> desc emp;
Name     Type         Nullable Default Comments
-------- ------------ -------- ------- --------
EMPNO    NUMBER(4)                             
ENAME    VARCHAR2(10) Y                        
JOB      VARCHAR2(9)  Y                        
MGR      NUMBER(4)    Y                        
HIREDATE DATE         Y                        
SAL      NUMBER(7,2)  Y                        
COMM     NUMBER(7,2)  Y                        
DEPTNO   NUMBER(2)    Y                        

SQL> select sal,job,depno from emp;

select sal,job,depno from emp

ORA-00904: "DEPNO": 标识符无效

SQL> select sal,job,deptno from emp;

      SAL JOB       DEPTNO
--------- --------- ------
   800.00 CLERK         20
  1600.00 SALESMAN      30
  1250.00 SALESMAN      30
  2975.00 MANAGER       20
  1250.00 SALESMAN      30
  2850.00 MANAGER       30
  2450.00 MANAGER       10
  3000.00 ANALYST       20
  5000.00 PRESIDENT     10
  1500.00 SALESMAN      30
  1100.00 CLERK         20
   950.00 CLERK         30
  3000.00 ANALYST       20
  1300.00 CLERK         10

14 行 已选择

已执行耗时 0.141 秒

SQL> select sal,job,deptno from emp where ename='smith';

      SAL JOB       DEPTNO
--------- --------- ------

已执行耗时 0.016 秒

SQL> select sal,job,deptno from emp where ename='SMITH';

      SAL JOB       DEPTNO
--------- --------- ------
   800.00 CLERK         20

已执行耗时 0.031 秒

SQL> select SAL,job,deptno from emp where ename='SMITH';

      SAL JOB       DEPTNO
--------- --------- ------
   800.00 CLERK         20

已执行耗时 0.047 秒

SQL> desc dep
对象 dep 不存在.

SQL>
SQL> desc dept;
Name   Type         Nullable Default Comments
------ ------------ -------- ------- --------
DEPTNO NUMBER(2)                             
DNAME  VARCHAR2(14) Y                        
LOC    VARCHAR2(13) Y                        

SQL> desc emp;
Name     Type         Nullable Default Comments
-------- ------------ -------- ------- --------
EMPNO    NUMBER(4)                             
ENAME    VARCHAR2(10) Y                        
JOB      VARCHAR2(9)  Y                        
MGR      NUMBER(4)    Y                        
HIREDATE DATE         Y                        
SAL      NUMBER(7,2)  Y                        
COMM     NUMBER(7,2)  Y                        
DEPTNO   NUMBER(2)    Y                        

SQL>