新学习的命令

标签：varchar   targe   creat   var   create   int   date   ble   when   

1.Merge

create table sourceTable(id int ,val varchar(20))
create table targetTable (id int,val varchar(20))
insert into targetTable values(1,‘a‘),(2,‘b‘),(3,‘c‘)
insert into sourceTable values(3,‘c‘),(4,‘d‘),(4,‘d‘)

----

MERGE INTO TargetTable AS T
USING SourceTable AS S
ON T.id=S.ID
WHEN MATCHED
THEN
UPDATE SET t.Val=s.val
WHEN NOT MATCHED
THEN INSERT VALUES(s.id,s.val)
WHEN NOT MATCHED BY SOURCE
THEN DELETE;

新学习的命令

标签：varchar   targe   creat   var   create   int   date   ble   when   

原文地址：http://www.cnblogs.com/jobnet/p/7112734.html