Question

I want to write a query that returns all non-empty cells in column X AND whose values are not 2, 5, OR 8. Am I doing this right? Because my results sure look wrong.

SELECT *
FROM [Example].[dbo].[table]
WHERE X <> '' AND (X <> '2' OR X <> '5' OR X <> '8');  

Answer 1

by empty, you mean NULL (nothing) and empty string is not equal to null so you should use special condition to filter out non-NULL values using IS NOT NULL

WHERE X IS NOT NULL AND 
      X NOT IN('', '2', '5', '8');