What does the symbol t mean in this query?

Question

SQL

select max(cnt) from (select count(recruitmental_id) as cnt from recruitment_for_the_program group by program_id) t
I'm guessing t is an abbreviation for the table name, but I haven't seen it assigned. Perhaps the matter is in cnt, which, in theory, is just a name too. Please clarify

Answer 1

t is short for expression as tthat assigns a name to the result of the subquery.