Question

Trying to setup a SQL stored procedure that if the variable passed to it equals the keyword ‘All’ It negates the column ‘PlatformName’ from the WHERE clause and returns everything in PlatformName and the variable in @Title.

My SQL code is below.

WHERE PlatformName = CASE @Platform 
                       WHEN 'All' THEN '' 
                       ELSE @Platform 
                     END 
AND Title LIKE '%' + @Title + '%'

The ” is not returning anything.

Table
PlatformName   Title
XBox 360       Foobar
PS3            Foobar

Answer 1

One way to do exactly what you are trying to do is:

WHERE PlatformName = CASE @Platform 
                       WHEN 'All' THEN PlatformName
                       ELSE @Platform 
                     END 
AND Title LIKE '%' + @Title + '%'

Another common way you’ll see used is:

WHERE (PlatformName = @Platform OR @Platform = 'All')
    AND ...

I’d recommend testing those for performance.