MYSQL Left Join how do I select NULL values?

Question

This is a follow up question to my last question about table joins in MySQL

I need to be able to select the NULL values from the left joined table.

Here\'s m

Answer 1

To compare NULL values you have to use the IS NULL predicate, like this:

SELECT table1.*, table2.*
FROM table1
LEFT JOIN table2 ON table1.id=table2.id
WHERE table2.surname IS NULL