2对输出子句的更新语句

Question

UPDATE b
SET  b.update_flag=0 
from table1 a
inner join table2 b on a.user_code=b.user_code 
where a.pin_number IS NULL

UPDATE a
SET a.pin_number = Adinfo.dbo.udf_ad_Encrypt(b.pin_number)
from table1 a
inner join table2 b on a.user_code=b.user_code 
where a.pin_number IS NULL 

Can someone help me how can I write this with output clause in sql server

Answer 1

I see what the problem is: I should use output keyword and get the values from the second update statement and get those values inserted in first update statement. It can be done by using output clause. – Durga I should use output keyword and get the values from the second update statement and get those values inserted in first update statement. It can be done by using output clause. – Durga

You just have to change your update statements' places.
At first you update pin_number in table "b" and then set to "1" all update_flag in table "a".

Then you wouldn't need output at all. Only one restriction: you have to wrap it inside of transaction.

BEGIN TRANSACTION 

UPDATE a
SET a.pin_number = Adinfo.dbo.udf_ad_Encrypt(b.pin_number)
from table1 a
inner join table2 b on a.user_code=b.user_code 
where a.pin_number IS NULL

UPDATE b
SET  b.update_flag=0 
from table1 a
inner join table2 b on a.user_code=b.user_code 
where a.pin_number IS NULL

COMMIT TRANSACTION