Set Variable value in exists condition sql server
Declare @CategoryID as intSET @CategoryID = CASE WHEN EXISTS(SELECT 1 FROM Categories WHERE Categoryname = @CategoryName) THEN 1 ELSE 0 ENDAnother way would be something like ....
IF EXISTS (SELECT 1 FROM Categories WHERE Categoryname = @CategoryName) BEGIN SET @CategoryID = 1; ENDELSE BEGIN SET @CategoryID = 0; END
My 2 cents...
DECLARE @any BIT = 0SELECT TOP 1 @any = 1 FROM Categories WHERE CategoryName = @CategoryNameIF (@any = 1) PRINT 'Yes'ELSE PRINT 'No'
This will return the category id, if it exists, and 0 if it does not.
SET @CategoryID = null;SELECT @CategoryID = t0.CategoryidFROM Categories AS [t0]WHERE [t0].Categoryname = @CategoryName;IF @CategoryID IS NULL SET @CategoryID = 0;SELECT @CategoryID AS [value];However, I would recommend just returning null if it doesn't exist, or returning an additional @Exists (BIT) to indicate if it exists or not.