如何在 SQL 服务器中创建 IF

Question

I have a table that contains a lot of requests ( BursaryRequestId ). Some requests have the same identifier because they have an original and modified copy.

I need to write a T-SQL script that will check all the results if the Identifier StatusID of the modified version is equal to the original version. If it's not equal then change the modified version with the original's version StatusID .

You can see on the image that the modified version ( IsOriginal = '0' ) have a StatusId of '1' and that need to be changed to '3' like the original version.

Answer 1

I think you want:

with toupdate as (
      select t.*,
             max(case when isoriginal = 1 then statusid end) over (partition by identifier) as original_statusid
      from t
     )
update toupdate
    set statusid = original_statusid
    where isoriginal = 0 and statusid <> original_statusid;