Question

Ok first the query I will be displaying is very rough looking. Pointers on how to optimize it would be great but that is not my main purpose right now I need something that works. I will post the query and the results

    SELECT u.[UserName]
      ,u.[LoweredUserName]
      ,m.[BarCode]
      ,m.[MemberID]
      ,d.[FirstName]
      ,d.[LastName]
  FROM [sqlmdstgbiz02].[WebDB].[dbo].[aspnet_Users] u,
  [mdsqlst].[CMS_PRODUCTION].[dbo].[memMember] me,
  [mdsqlst].[CMS_PRODUCTION].[dbo].[Demographics] d,
  [sqlmd05stg\sqlmd05stg].EntranceControl.dbo.MemberBarCodes m
  where
  (substring(u.UserName, len(u.UserName)-12,13) = m.Barcode or
  substring(u.UserName, len(u.UserName)-11,12)  = m.Barcode or
  substring(u.UserName, len(u.UserName)-10,11)  = m.Barcode or
  substring(u.UserName, len(u.UserName)-9,10)  = m.Barcode or
  substring(u.UserName, len(u.UserName)-8,9) = m.Barcode) and
  me.MemberID = m.MemberID and me.DemographicsID = d.DemographicsID

The results of the code are

UserName          BarCode        MemberID      FirstName   LastName
down120000008     120000008      8300100364005 TOUCH       DOWN
test120000009     120000009      8300100606009 KET TAG     TEST
abbott123567567   123567567      8300100635008 HENRY       ABBOTT

Now as you can see the UserName is simple the Lastname and the BarCode combined together. What I need to do is update the UserName with the LastName and MemberID but in a way that will allow me to update hundreds of UserName with one script. All of this information is on different servers so I know I have to do a Linked Server which the DBA is setting up right now. Any more information please ask.

Answer 1

Assuming this is SQL Server, you can use UPDATE FROM to perform the update.

 BEGIN TRAN

 UPDATE u 
 SET    UserName = d.FirstName + m.MemberID
 OUTPUT INSERTED.*
 FROM   [sqlmdstgbiz02].[WebDB].[dbo].[aspnet_Users] u
        , [mdsqlst].[CMS_PRODUCTION].[dbo].[memMember] me
        , [mdsqlst].[CMS_PRODUCTION].[dbo].[Demographics] d
        , [sqlmd05stg\sqlmd05stg].EntranceControl.dbo.MemberBarCodes m
 WHERE  (substring(u.UserName, len(u.UserName)-12,13) = m.Barcode 
          or substring(u.UserName, len(u.UserName)-11,12)  = m.Barcode 
          or substring(u.UserName, len(u.UserName)-10,11)  = m.Barcode 
          or substring(u.UserName, len(u.UserName)-9,10)  = m.Barcode 
          or substring(u.UserName, len(u.UserName)-8,9) = m.Barcode
        ) 
        and me.MemberID = m.MemberID 
        and me.DemographicsID = d.DemographicsID

 ROLLBACK TRAN

Edit

As HLGEM correctly points out, you should replace the implicit syntax with proper INNER JOIN statements.

 BEGIN TRAN

 UPDATE u
 SET    UserName = d.FirstName + m.MemberID
 OUTPUT INSERTED.*
 FROM   [mdsqlst].[CMS_PRODUCTION].[dbo].[memMember] me
        INNER JOIN [mdsqlst].[CMS_PRODUCTION].[dbo].[Demographics] d ON d.DemographicsID = me.DemographicsID
        INNER JOIN [sqlmd05stg\sqlmd05stg].EntranceControl.dbo.MemberBarCodes m ON m.MemberID = me.MemberID
        INNER JOIN [sqlmdstgbiz02].[WebDB].[dbo].[aspnet_Users] u ON u.UserName LIKE '%' + m.Barcode

 ROLLBACK TRAN