Question

I’m looking at some sql code with the following structure:

set @var =
(
    select count(1) from
    (
        select * from table where field = 1
    )
    someVariable
)

It won’t seem to run unless “someVariable” is in the statement. My question is, what does this “someVariable” represent, and why is it in the query? I don’t understand why I can’t set @var to the select count statement outright, so the “someVariable” is really throwing me off.

Answer 1

Derived tables need to have aliases. someVariable is functioning as an alias in this case.