Php MySQL表连接取决于条件

我有四张这样的桌子： 表1：考试

-----------+--------------+---------
examID     |    examName  | session |
-----------+--------------+---------

表2：课程

-----------+--------------+---------
courseID   |     title    |  credit |
-----------+--------------+---------

表3：审查员

-------------+----------+-------------+------------+--------+
examinerID   |  examID  |  teacherID  |  courseID  |   part |
-------------+----------+-------------+------------+--------+
   1         |    1     |   3         |    5       | A or B |
-------------+----------+-------------+------------+--------+

表4：标记

---------+--------------+-------------+-----------+------
markID   |  examinerID  |  studentID  |  courseID | mark |
---------+--------------+-------------+-----------+------

我想在这些表上运行一些查询，以便根据examID生成课程表单考官表的php数组，如下所示：-

$marks['courseID'] = array(
          'course'     => array(),//array of course details 
          'part_a_mark'=> array(),// array of marks of part A of that courseID 
          'part_B_mark'=> array(),// array of marks of part B of that courseID 
     );

---

使用SQL语句无法直接获得预期的输出。您需要在php循环语句中处理查询结果，然后通过遍历结果形成数组。

没有SQL语句会为您提供php数组。