IN Operator SQL

Question

I have a table called NUMS with a single column n.
And I fill values 1,2,3,4,5,null in it.

Now a query

SELECT n FROM Nums 
 WHERE n IN (1, 2,         


        

Answer 1

You cannot compare directly with null. To find whether the value of a column is null, you must use something along the lines of this:

SELECT n
FROM Nums
WHERE n IS NULL