跟随Mysql query to dynamically convert rows to columns on the basis of two columns， 我有4个表将dinamiacally行转换为列为RESULT
表A
| id | stages |
-----+----------
| 1 | Stage A |
| 2 | Stage B |
| 3 | Stage C |
表B
| id_b | code | lessons |
-------+------+--------------
| 10 | FIS | Physics |
| 11 | MAT | Mathematics |
| 12 | KIM | Chemistry |
| 13 | BIO | Biology |
表C
|id_c| students |
-----+-------------
| 20 | student 20 |
| 21 | student 21 |
| 22 | student 22 |
| 23 | student 23 |
| 24 | student 24 |
| 25 | student 25 |
| 26 | student 26 |
| 27 | student 27 |
表D
| id_d | id_a | id_b | id_c | value_m | value_n |
-------+------+------+------+---------+----------
| 201 | 1 | 11 | 20 | 71 | 73 |
| 203 | 1 | 13 | 20 | 80 | 87 |
| 204 | 2 | 10 | 21 | 72 | 75 |
| 206 | 2 | 13 | 21 | 76 | 78 |
| 208 | 2 | 12 | 22 | 72 | 78 |
| 209 | 2 | 13 | 22 | 76 | 80 |
| 210 | 3 | 11 | 23 | 73 | 71 |
| 211 | 3 | 12 | 23 | 71 | 77 |
| 212 | 3 | 13 | 23 | 78 | 81 |
| 213 | 3 | 10 | 24 | 70 | 81 |
| 214 | 3 | 11 | 25 | 71 | 82 |
| 215 | 3 | 12 | 26 | 74 | 83 |
| 215 | 3 | 13 | 27 | 78 | 80 |
RESULT
| students | FIS_1 | MAT_1 | KIM_1 | BIO_1 | FIS_2 | MAT_2 | KIM_2 | BIO_2 | FIS_3 | MAT_3 | KIM_3 | BIO_3 |
-------------+-------+-------+-------+-------+--------+------+-------+-------+-------+-------+-------+--------
| student 20 | | 71,73 | | 80,87 | | | | | | | | |
| student 21 | | | | | 72,75 | 76,78 | | | | | | |
| student 22 | | | | | | | 72,78 | 76,80 | | | | |
| student 23 | | | | | | | | | | 73,71 | 71,77 | 78,81 |
| student 24 | | | | | | | | | 70,81 | | | |
| student 25 | | | | | | | | | | 71,82 | | |
| student 26 | | | | | | | | | | | 74,83 | |
| student 27 | | | | | | | | | | | | 78,80 |
其中 FIS_1，MAT_1，... FIS_2，MAT_2 ..，FIS_3，MAT_3 .. CONCAT 来自表B kode和TABLE A id，
和值 MAT_1，BIO_1 ...来自表D的CONCAT value_m和value_n
它的可用性？我怎么能用GROUP_CONCAT mysql查询呢？我已经尝试了但仍未成功..
感谢您的推进..