SQL Query - get row exites some value on other table laravel - php

Question

I have a query
$cartable = DB::table('requests')
->select('requests.*','crequest.*')
->leftJoin('crequest','crequest.id','=','requests.request_id')
->whereRaw("FIND_IN_SET('$userid', crequest.user_allows)")
->orderBy('forms_cartable.id','desc')->get();
my tables:
requests:
+------+-------------+-------------------+-------------------+
| id | request_name | request_priority | request_status |
+------+-------------+-------------------+-------------------+
| 1 | test1 | low | process |
| 2 | test2 | low | process |
| 3 | test3 | low | process |
+------+--------------+------------------+-------------------+
crequest
+------+-------------+----------------+--------------+
| id | request_id | users_allow | c_status |
+------+-------------+----------------+--------------+
| 3 | 1 | 12,13,15 | done |
| 4 | 1 | 12 | done |
| 5 | 1 | 13 | end |
| 6 | 2 | 42,12,35 | done |
| 7 | 2 | 47,65 | done |
| 8 | 3 | 42 | open |
+------+-------------+----------------+--------------+
I want if there was an existing current user ID(Logged
) in crequest.user_allows return request`s only without crequest detail
look like this:
(if current user id 12 )
request table result (after execute query)
+------+-------------+-------------------+-------------------+
| id | request_name | request_priority | request_status |
+------+-------------+-------------------+-------------------+
| 1 | test1 | low | process |
| 2 | test2 | low | process |
+------+--------------+------------------+-------------------+
but query result all record match in table crequest i need only requests rows if have match in crequest table

Answer 1

I don't know php but you can achieve it in MySql in so many ways. These are 3 ways among them..
Method 1:
SELECT DISINCT R.*
FROM requests R
INNER JOIN crequest CR ON R.id = CR.request_id
WHERE FIND_IN_SET ('12', CR.users_allow);
Method 2:
SELECT *
FROM requests R
WHERE EXISTS (SELECT 1 FROM crequest CR WHERE R.id = CR.request_id
AND FIND_IN_SET ('12', CR.users_allow));
Method 3:
SELECT *
FROM requests R
WHERE R.id in (SELECT request_id FROM crequest WHERE FIND_IN_SET ('12', CR.users_allow))