php - Can I use a subquery's result as well? -


i have 2 tables:

ads: fields id, a, b , c:

+----+---+-------+------+ | id | | b     | c    | +----+---+-------+------+ |  1 | x | y     | z    | |  2 | c | v     | b    | |  3 | n | n     | m    | +----+---+-------+------+

requests: fields id, adid, , status:

+----+------+----------+ | id | adid |  status  | +----+------+----------+ |  3 |    1 | approved | |  4 |    2 | pending  | |  5 |    3 | rejected | +----+------+----------+

id (from ads) = adid (from requests).

i have query:

select * ads id in (select adid requests status = 'approved' or status = 'rejected')

this gives me rows ids 1 , 3 ads. question is, can use 'approved' or 'rejected' subquery well?

so there way can say:

$sql="select * ads id in (select adid requests status = 'approved' or status = 'rejected')"; $result=mysqli_query($con, $sql); while($row = mysqli_fetch_assoc($result)) {     echo $row['status']; //<--- doesn't work right now. want 'approved'/'rejected' }

and works?

a where ... in query filter. can same filtering join:

select  *     ads join    requests r on      a.id = r.adid   r.status in ('approved', 'rejected')

unlike where ... in filter, inner join filter includes columns other table in result.


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