我有一个像这样的SQL查询：
SELECT mahasiswa.nim, mahasiswa.nama, nilai_pretest.nilai_pretest, nilai_session.nilai_session FROM nilai_session
INNER JOIN materi ON materi.id_materi=nilai_session.id_materi
INNER JOIN nilai_pretest ON nilai_pretest.id_nilai_pretest=nilai_session.id_nilai_pretest
INNER JOIN pengambilan ON pengambilan.id_pengambilan=nilai_pretest.id_pengambilan
INNER JOIN mahasiswa ON mahasiswa.nim= pengambilan.nim
INNER JOIN pengampu ON pengampu.id_pengampu= pengambilan.id_pengampu
WHERE pengampu.id_pengampu=4
结果是：
+-----------+-------+---------------+---------------+
| nim | nama | nilai_pretest | nilai_session |
+------------+-------+---------------+---------------+
| 1215051173 | nama1 | 70 | 100 |
| 1215051173 | nama1 | 70 | 35 |
| ... | .... | | |
+------------+-------+---------------+---------------+
但我想要这样的结果：
+-----------+-------+---------------+---------+---------+-----------+
| nim | nama | nilai_pretest | materi1 | materi2 | materi... |
+------------+-------+---------------+---------+---------+-----------+
| 1215051173 | nama1 | 70 | 100 | 35 | ... |
| ... | .... | ... | ... | ... | ... |
+------------+-------+---------------+---------+---------+-----------+
我该如何处理？我尝试了很多方法，但仍然无法正常工作。
=============================================== =
我的结构表是：
** nilai_session表
+-----------------+---------------+------------------+-----------+
| id_nilai_session | nilai_session | id_nilai_pretest | id_materi |
+------------------+---------------+------------------+-----------+
| 8 | 100 | 5 | ... |
| 9 | 35 | 5 | ... |
| ... | .... | ... | ... |
+------------------+---------------+------------------+-----------+
** materi table
+-----------+-------------+-----+
| id_materi | judul_materi | ... |
+-----------+--------------+-----+
| 5 | 6 | ... |
| ... | .... | ... |
+-----------+--------------+-----+
** nilai_pretest表
+-----------------+--------------+---------------+
| id_nilai_pretest | id_pengambil | nilai_pretest |
+------------------+--------------+---------------+
| 5 | 6 | 70 |
| ... | .... | ... |
+------------------+--------------+---------------+
** pengambilan表
+---------------+-------------+------------+
| id_pengambilan | id_pengampu | nim |
+----------------+-------------+------------+
| 6 | 4 | 1215051173 |
| ... | .... | ... |
+----------------+-------------+------------+
** mahasiswa table
+-----------+-------+
| nim | nama |
+------------+-------+
| 1215051173 | nama1 |
| 1215051112 | nama2 |
| ... | .... |
+------------+-------+
** pengampu表
+------------+---------------+------+
| id_pengampu | id_matakuliah | ... |
+-------------+---------------+------+
| 4 | TIK1225 | ... |
| 5 | TIK1204 | ... |
| ... | .... | ... |
+-------------+---------------+------+
感谢您的关注。