当Merge into
使用insert
以下语句时,Scope_Identity
返回正确的代理键信息。但是,当update
两者都执行Scope_Identity
并@@Identity
返回下一个可用的代理键时。当我添加 时,我在和output
上都得到了一个空值。update
insert
如何在update
和上返回代理键insert
?
DECLARE @Surrogate_KEY bigint
MERGE INTO [dbo].[MyTable] ChangeSet
USING (SELECT @NaturalKey1 AS NaturalKey1,
@NaturalKey2 AS NaturalKey2,
@NaturalKey3 AS NaturalKey3,
@Surrogate_KEY AS Surrogate_KEY) CurrentSet
ON ChangeSet.NaturalKey1 = CurrentSet.NaturalKey1 AND
ChangeSet.NaturalKey2 = CurrentSet.NaturalKey2 AND
ChangeSet.NaturalKey3 = CurrentSet.NaturalKey3
WHEN MATCHED THEN
UPDATE SET blah, blah, blah
WHEN NOT MATCHED
THEN INSERT VALUES
(
blah, blah, blah
)
output CurrentSet.*, @Surrogate_KEY ;
print @Surrogate_KEY
print @@IDENTITY
print SCOPE_IDENTITY()