Evaluating different conditions in one if statement on a stored proc

Question

I have a stored proc I am trying to write , where I want to evaluate multiple conditions on the different parameters in one go. What is the best syntax for this?

Below is what I have:

AS
BEGIN
    DECLARE @GARRISON nvarchar(255)
    DECLARE @ASSETTYPE nvarchar(255)
    DECLARE @FIVALUE int

    IF (  ( @GARRISON IS NOT 'Netheravon' 
            AND @GARRISON IS NOT 'Ludgershall'
          )
          AND @INTERRUPT >= 5)
        BEGIN

        END
    ELSE

END

Solution

You can use.

IF ((@GARRISON != 'Netheravon' AND @GARRISON != 'Ludgershall') )
AND @INTERRUPT >= 5)

This can be shortened to

IF (@GARRISON NOT IN ('Netheravon', 'Ludgershall' )
AND @INTERRUPT >= 5)

The problem you had was that you have @variable IS NOT 'constant' - this isnt valid SQL Syntax unless checking for null. For equality use =, for non-equality use != or <> (Both work IIRC).

---

Edit: This is the exact sctipt I used for testing, and works exactly as expected. SQL Server 2008

DECLARE @GARRISON nvarchar(255)
DECLARE @INTERRUPT INT

SET @GARRISON = 'Test'
SET @INTERRUPT = 10


IF (@GARRISON NOT IN ('Netheravon' ,'Ludgershall' )
   AND @INTERRUPT >= 5)  
BEGIN
SELECT 1
END

The above correctly outputs "1" as both conditions evaluate true. If I either change @INTERRUPT to 4, or @GARRISON to either Netheravon or Ludgershall then there is no output. This is the exact behaviour I expect.

Note: You can't have an empty BEGIN...END block in SQL, so if that is empty you'll get the error Incorrect syntax near 'END'.