oracle中合并insert、update语句

UpSert功能：

MERGE INTO
USING
ON ()
WHEN MATCHED THEN
WHEN NOT MATCHED THEN ;

 

 

 eg: 

create table ww_test(

id number,

name varchar2(30),

age number

);

create table ww_test2(

id2 number,

name varchar2(30),

age number

);

--将ww_test2中的记录合并到ww_test中（相同id的更新name，没有的插入）

merge into ww_test a

using ww_test2 b

on (a.id = b.id)

when matched then

update set a.name = b.name

when not matched then

insert values(b.id,b.name,b.age);