Postgres NOT IN (null) gives no result

Question

I\'m using Postgres with this query

select 
*
from Entity this_ 
where 
(this_.ID not in (null))

Why does this give me no results? I would expe

Answer 1

select * 
from Entity this_ 
where (this_.ID not in (null))

"IN" or "NOT IN" do not select NULL values You can write

select * 
from Entity this_ 
where (this_.ID not in (1))

And your selection will not contains null values