I have a column in my table that has a few different values, of

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Editorial Team

Asked: May 22, 20262026-05-22T23:16:46+00:00 2026-05-22T23:16:46+00:00

I have a column in my table that has a few different values, of which I verified by using a group by.

When I do something like this it returns a number amount:

SELECT COUNT(*) FROM table WHERE age='';

However when I do this it always returns 0 even though that is incorrect:

SELECT COUNT(*) FROM table WHERE age=NULL;

Any idea why this is returning 0 when it should be returning the correct result?

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Editorial Team · Answer 1 · 2026-05-22T23:16:47+00:00

Editorial Team

SELECT COUNT(*) FROM table WHERE age IS NULL;

To test for NULL, you cannot use the
arithmetic comparison operators such
as =, <, or <>.

Use the IS NULL
and IS NOT NULL operators instead:

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