Trying to set a variable in a SQL Statement from with the SELECT?

What I need to do is assign the value from "createdBy_ID" to a variable @user_ID but not sure how to do it. Where can I find some good tutorials on PL-SQL? Also, I'm using SQL Server 2012 instead of 2008.

Thanks!

        DECLARE @user_ID               INT=NULL

	IF EXISTS(SELECT userAccount_ID, createdBy_ID FROM USER_Permissions WHERE userAccount_ID = @userAccount_ID AND menuItem_ID = @menuItem_ID)
		BEGIN
			UPDATE	USER_Permissions
			   SET	allowUpdate = @iUpdate
					,allowView = @iView
                                        ,createdBy_ID = @user_ID
					,updatedBy_ID = @updatedBy_ID
					,dateUpdated = GETDATE()
			 WHERE	userAccount_ID = @userAccount_ID AND menuItem_ID = @menuItem_ID
		END
	ELSE

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BlakeMcKennaAsked:
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Haris DulicCommented:
here is the requested code

        DECLARE @user_ID               INT=NULL

	IF EXISTS(SELECT userAccount_ID, createdBy_ID FROM USER_Permissions WHERE userAccount_ID = @userAccount_ID AND menuItem_ID = @menuItem_ID)
		BEGIN
		
		set @user_ID =(SELECT  createdBy_ID FROM USER_Permissions WHERE userAccount_ID = @userAccount_ID AND menuItem_ID = @menuItem_ID)
			UPDATE	USER_Permissions
			   SET	allowUpdate = @iUpdate
					,allowView = @iView
                    ,createdBy_ID = @user_ID
					,updatedBy_ID = @updatedBy_ID
					,dateUpdated = GETDATE()
			 WHERE	userAccount_ID = @userAccount_ID AND menuItem_ID = @menuItem_ID
		END
	ELSE

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slubekCommented:
I'm not sure what are you trying to achieve, but what about

...
,createdBy_id = SYSTEM_USER
...

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?
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Shaun KlineLead Software EngineerCommented:
If all you are doing is setting the CreatedBy field to the existing value, you can just exclude that field from your update statement.
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Scott PletcherSenior DBACommented:
>> Where can I find some good tutorials on PL-SQL? <<

Hmm, since PL/SQL is Oracle's language, presumably an Oracle site?

SQL's code, as you've written, is T-SQL (Transact SQL).


@user_ID, and the other variables, needs a value assigned or you will just INSERT NULL values.  You need to either pass those variables as parameters to the proc or assign them values in the proc.

Then, you can just issue the UPDATE without checking first: if there's no matching row, none will be UPDATEd.


UPDATE      USER_Permissions
   SET      allowUpdate = @iUpdate
            ,allowView = @iView
            ,createdBy_ID = @user_ID
            ,updatedBy_ID = @updatedBy_ID
            ,dateUpdated = GETDATE()
  WHERE      userAccount_ID = @userAccount_ID AND menuItem_ID = @menuItem_ID
0
BlakeMcKennaAuthor Commented:
This is what I was looking for. The other answers made sense but the logic of the program is such that I need to handle it in the SP.

Thanks samo!
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Microsoft SQL Server 2008

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