Category "isnull"

MySQL One-to-many association with where clause and null check

A fiddle of the question below can be found here. I'm attempting to get a list of all articles regardless of their joined association. Let's say we have the fol

SQL Server - NULL vs blank in IF condition - ISNULL vs COALESCE

I am expecting ELSE part to be printed in this case. But it doesn't. It works if the input is blank ''. But for null, it fails. Even with ISNULL and COALESCE, i