php - SQL 查询 - 获取行退出其他表 laravel 上的一些值

Question

我有一个问题

$cartable = DB::table('requests')
        ->select('requests.*','crequest.*')
        ->leftJoin('crequest','crequest.id','=','requests.request_id')
        ->whereRaw("FIND_IN_SET('$userid', crequest.user_allows)")
        ->orderBy('forms_cartable.id','desc')->get();

我的表:

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         |
+------+-------------+----------------+--------------+

我想如果有一个现有的当前用户 ID(Logged) 在 crequest.user_allows 中仅返回请求而没有 crequest 详细信息

看起来像这样:

(如果当前用户 ID 为 12)请求表结果(执行查询后)

+------+-------------+-------------------+-------------------+
| id   | request_name | request_priority | request_status    |
+------+-------------+-------------------+-------------------+
|  1   |    test1     |         low      |      process      |
|  2   |    test2     |         low      |      process      |
+------+--------------+------------------+-------------------+

但是查询结果所有记录在表crequest中匹配我只需要请求行如果在crequest表中匹配

Answer 1

我不知道 php 但您可以通过多种方式在 MySql 中实现它。这是其中的3种方式..

方法一:

SELECT DISINCT R.*
FROM requests R
INNER JOIN crequest CR ON R.id = CR.request_id
WHERE FIND_IN_SET ('12', CR.users_allow);

方法二:

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));

方法三:

SELECT *
FROM requests R
WHERE R.id in (SELECT request_id FROM crequest WHERE FIND_IN_SET ('12', CR.users_allow))