Sql server with as update用法
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create table t1
( id int,[names] varchar(100))
create table t2
( id int,[names] varchar(100))
insert into t1 values(1,‘t1‘);
insert into t1 values(2,‘t2‘);
insert into t1 values(3,‘t3‘);
insert into t2 values(1,‘ttt1‘);
with temp(id,names) as
(
select id,names from t1
)
Merge into temp as a
Using t2 as b on a.id=b.id
when MATCHED THEN
Update SET a.names = b.names;
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