Oracle专题

定时任务：JOB文件夹

监视执行过的SQL 语句 

select * from v$sqlarea a where module='PL/SQL Developer' order by a.FIRST_LOAD_TIME desc

导出命令：exp

https://blog.csdn.net/jiushancunmonkeyking/article/details/78851461   

exp的参数文件 ：  https://blog.csdn.net/IndexMan/article/details/102534974
 

数据库导出注意事项

如不能整个库导出，单独导出表、触发器、序列，Oracle中使用序列产生的自增列，注意序列的当前值问题

查看数据库大小

Linsener.log文件太大

Oracle函数--字符串拼接

select WM_CONCAT(COLUMN_NAME )  AS SCORE表的列名 from user_tab_columns WHERE TABLE_NAME = 'T_BC_QH'; 

oracle常用系统表

语句：

INSERT INTO T_BD_FXXX(BT) VALUES((select to_char(sysdate, 'yyyy-mm-dd hh24:mi:ss') from dual)||' '||'BEGIN_PRO_XSQ_MSFHFHFH');   -- 字符串连接不用+，而是||
lsbNo number;
select count(*) into lsbNo from all_tables where TABLE_NAME = 'PD_TMP';     --  变量赋值

后来发现PL/SQL中在SQL窗口下是不能执行EXEC命令的，要用BEGIN END包起来，改成这样后马上执行成功

BEGIN

INSERTINFO;

END;

SQL窗口中：

declare r varchar(90);begin

-- Call the procedure
--sayremotehello;
execute immediate 'begin sayHello@hsmzj(:a); end;' using out r;
dbms_output.put_line(r);
end;

存储过程中

create or replace procedure "SAYREMOTEHELLO" authid current_user as
sqlstr varchar(1000);
r varchar(100);
begin
--sqlstr:='drop database link tlink';
-- execute immediate sqlstr;
-- sqlstr:= 'create database link tlink connect to scott identified by fj1234 using ''(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.70)(PORT = 1521)))(CONNECT_DATA = (SERVICE_NAME = orcl)))''';
-- SERVICE_NAME 使用 SELECT * FROM GLOBAL_NAME; 可查，默认为orcl
-- sqlstr:= 'create database link tlink connect to '||name||' identified by '||pwd||' using ''(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = '||ip|| ')(PORT = 1521)))(CONNECT_DATA = (SERVICE_NAME = orcl)))''';

-- execute immediate sqlstr;
sqlstr:='begin sayHello@hsmzj(:a); end;';    -- 注意ORACLE中的等于 ：=
execute immediate sqlStr using out r;   --存储过程返回值赋值

dbms_output.put_line(r);
end SAYREMOTEHELLO;

execute immediate sqlStr into 变量

oracle 写declare例子

oracle 的存储过程里没有declare的语法，触发器和plsql块才是declare
如果要定义变量，后面直接跟as的
CREATE OR REPLACE PROCEDURE c(xxx)
aS
para number;
BEGIN
end;

 

存储过程一个总结的非常全的博客

http://www.cnblogs.com/chinafine/archive/2010/07/12/1776102.html