Oracle 批量插入数据

多表的insert语句

• 语法

  INSERT [ALL] [conditional_insert_clause][insert_into_clause values_clause] (subquery)

• conditional_insert_clause
  

  [ALL] [FIRST][WHEN condition THEN] [insert_into_clause values_clause][ELSE] [insert_into_clause values_clause]

无条件的 INSERT ALL

insert all    into test1 (empno,ename) values(empno,ename)    into test1(ename,sal) values(ename,sal)    select * from emp;

有条件的INSERT ALL语句(对于每一行数据，对每一个when条件都进行检查，如果满足条件就执行插入操作)

-- 有条件的INSERT ALL语句insert all        when sal>1000 theninto test1 (empno,sal,mgr) values (empno,sal,mgr) when comm<500 theninto test1 (empno,comm,mgr) values(empno,comm,mgr)select empno,sal,mgr,comm from emp;

有条件的 FIRST INSERT语句(对于每一行数据，只插入到第一个when条件成立的表，不继续检查其他条件)

-- 有条件的 FIRST INSERT语句-- 对于每一行数据，只插入到第一个when条件成立的表，不继续检查其他条件。insert firstwhen sal>1000 theninto test1 (empno,sal,mgr) values (empno,sal,mgr) when comm<500 theninto test1 (empno,comm,mgr) values(empno,comm,mgr)select empno,sal,mgr,comm from emp;

INSERT ALL 和INSERT FIRST对比

SQL> -- 有条件的INSERT ALL语句SQL> insert all  2          when sal>1000 then  3  into test1 (empno,sal,mgr) values (empno,sal,mgr)  4  when comm<500 then  5  into test1 (empno,comm,mgr) values(empno,comm,mgr)  6  select empno,sal,mgr,comm  7  from emp;已创建14行。SQL> -- 有条件的 FIRST INSERT语句SQL> -- 对于每一行数据，只插入到第一个when条件成立的表，不继续检查其他条件。SQL> insert first  2  when sal>1000 then  3  into test1 (empno,sal,mgr) values (empno,sal,mgr)  4  when comm<500 then  5  into test1 (empno,comm,mgr) values(empno,comm,mgr)  6  select empno,sal,mgr,comm  7  from emp;已创建12行。

旋转INSERT (行转列插入）

-- 旋转INSERT (行转列插入)insert all  into sales_info values(employee_id,week_id,sales_mon)  into sales_info values(employee_id,week_id,sales_tue)  into sales_info values(employee_id,week_id,sales_wed)  into sales_info values(employee_id,week_id,sales_thur)  into sales_info values(employee_id,week_id,sales_fri)  select employee_id,week_id,sales_mon,sales_tue,  sales_wed,sales_thur,sales_fri  from sales_source_data;  

效果：

--原表select * from sales_source_data;  EMPLOYEE_ID    WEEK_ID  SALES_MON  SALES_TUE  SALES_WED SALES_THUR  SALES_FRI  ----------- ---------- ---------- ---------- ---------- ---------- ----------          176          6       2000       3000       4000       5000       6000  

-- 转存后的表select * from sales_info;  EMPLOYEE_ID       WEEK      SALES  ----------- ---------- ----------          176          6       2000          176          6       3000          176          6       4000          176          6       5000          176          6       6000