Home/ Questions/Q 649813
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-13T21:59:06+00:00

SELECT A, B, C FROM TUser UNION IF EXISTS(SELECT dataUserId FROM TUserData WHERE DataId

  • 0
SELECT A, B, C FROM TUser

UNION

IF EXISTS(SELECT dataUserId FROM TUserData WHERE DataId = @dataId AND UserId = @userId)
  BEGIN
    SELECT @dataUserId  = dataUserId FROM TUserData WHERE DataId = @dataId AND UserId = @userId

    SELECT A, B, C FROM TUser WHERE UserId = dataUserId 
  END
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    You can transform it like that:

    SELECT @dataUserId  = dataUserId FROM TUserData
WHERE DataId = @dataId AND UserId = @userId

IF (@dataUserId IS NOT NULL)
  BEGIN
    SELECT A, B, C FROM TUser
    UNION
    SELECT A, B, C FROM TUser WHERE UserId = @dataUserId 
  END
ELSE
  SELECT A, B, C FROM TUser
    • 0