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  • oracle经典建表语句--scott建表

     
    create table EMP
    (
    EMPNO NUMBER(4) PRIMARY KEY,
    ENAME VARCHAR2(10),
    JOB VARCHAR2(9),
    MGR NUMBER(4),
    HIREDATE DATE,
    SAL NUMBER(7,2),
    COMM NUMBER(7,2),
    DEPNO NUMBER(4)
    );
    CREATE TABLE Dept(
    DEPTNO NUMBER(4),
    DNAME VARCHAR2(14),
    LOC VARCHAR2(13)
    );
    CREATE TABLE Salgrade
    (
    GRADE NUMBER,
    LOSAL  NUMBER,
    HISAL NUMBER 
    );
    CREATE TABLE Bonus
    (
    ENAME VARCHAR(10),
    JOB VARCHAR2(9),
    SAL NUMBER,
    COMM NUMBER
    );
    INSERT INTO Dept VALUES (10,'ACCOUNTING','NEW YORK');
    INSERT INTO Dept VALUES (20,'RESEARCH','DALLAS');
    INSERT INTO Dept VALUES (30,'SALES','CHICAGO');
    INSERT INTO Dept VALUES (40,'OPERATIONS','BOSTON');
    SELECT * FROM DEPT;
    INSERT INTO EMP VALUES
    (7369,'SMITH','CLERK',7902,to_date('17-12-1980','dd-mm-yyyy'),800,null,20);
    INSERT INTO EMP VALUES
    (7499,'ALLEN','SALESMAN',7698,to_date('20-2-1981','dd-mm-yyyy'),1600,300,30);
    INSERT INTO EMP VALUES
    (7521,'WARD','SALESMAN',7698,to_date('22-2-1981','dd-mm-yyyy'),1250,500,30);
    INSERT INTO EMP VALUES
    (7566,'JONES','MANAGER',7839,to_date('2-4-1981','dd-mm-yyyy'),2975,NULL,20);
    INSERT INTO EMP VALUES
    (7654,'MARTIN','SALESMAN',7698,to_date('28-9-1981','dd-mm-yyyy'),1250,1400,30);
    INSERT INTO EMP VALUES
    (7698,'BLAKE','MANAGER',7839,to_date('1-5-1981','dd-mm-yyyy'),2850,NULL,30);
    INSERT INTO EMP VALUES
    (7782,'CLARK','MANAGER',7839,to_date('9-6-1981','dd-mm-yyyy'),2450,NULL,10);
    INSERT INTO EMP VALUES
    (7839,'KING','PRESIDENT',NULL,to_date('17-11-1981','dd-mm-yyyy'),5000,NULL,10);
    INSERT INTO EMP VALUES
    (7844,'TURNER','SALESMAN',7698,to_date('8-9-1981','dd-mm-yyyy'),1500,0,30);
    INSERT INTO EMP VALUES
    (7900,'JAMES','CLERK',7698,to_date('3-12-1981','dd-mm-yyyy'),950,NULL,30);
    INSERT INTO EMP VALUES
    (7902,'FORD','ANALYST',7566,to_date('3-12-1981','dd-mm-yyyy'),3000,NULL,20);
    INSERT INTO EMP VALUES
    (7934,'MILLER','CLERK',7782,to_date('23-1-1982','dd-mm-yyyy'),1300,NULL,10);
    select * from emp;
    INSERT INTO SALGRADE VALUES (1,700,1200);
    INSERT INTO SALGRADE VALUES (2,1201,1400);
    INSERT INTO SALGRADE VALUES (3,1401,2000);
    INSERT INTO SALGRADE VALUES (4,2001,3000);
    INSERT INTO SALGRADE VALUES (5,3001,9999);
    select * from salgrade;
    commit;
    
     
    --外键约束
    CREATE TABLE QQ(
        GARDE NUMBER(3) PRIMARY KEY,
        GNAME VARCHAR2(20)
    );
    CREATE TABLE FIREND(
        FID NUMBER(3),
        NAME VARCHAR2(20),
        GRADE NUMBER(3),
        FOREIGN KEY(GRADE) REFERENCES QQ(GARDE) ON DELETE CASCADE
    );
     
     
     
    
    
    
    
    
    
    
    
     
    
    创表时创建外键:
      FOREIGN KEY(列名) REFERENCES  引用外键表名(列名) ON DELETE CASCADE
    
    创表后添加外键:
    alter TABLE 表名 ADD constraint   外键约束名 FOREIGN KEY(列名) REFERENCES   引用外键表(列名) 
    ON UPDATE RESTRICT    //同步更新
    ON DELETE RESTRICT  //  同步删除;
    .....................................................................................................
    oracle实现主键id自增
    
    
     
    -- 创建表
    CREATE TABLE t_module (
      module_id   INT NOT NULL ,
        module_code   varchar(32) NOT NULL,
        module_name   varchar(32) NOT NULL,
        isnew   INT DEFAULT  0 ,
      PRIMARY KEY (module_id)
    )
    --  为 表 创建 序列
    -- 从1 开始, 每次 加1
    CREATE SEQUENCE SEQ_MODULE START WITH 1 INCREMENT BY 1;
     --查询 下一个 id
     select seq_module.nextval from dual
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  • 原文地址:https://www.cnblogs.com/chenglc/p/6923197.html
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