Question

I want to filter a record….

If statusid is null, filter the record (where statusId is not null)

If statusid is not null, filter the record where statusid is equal to the specified statusid.

How do I do this?

Answer 1

Just like you said

select * from tbl where statusid is null

or

select * from tbl where statusid is not null

If your statusid is not null, then it will be selected just fine when you have an actual value, no need for any “if” logic if that is what you were thinking

select * from tbl where statusid = 123 -- the record(s) returned will not have null statusid

if you want to select where it is null or a value, try

select * from tbl where statusid = 123 or statusid is null