有什么办法可以在mysql中将许多列转换为行？
表如下所示：
+----+---------+-----------+-----------+-------------+-------------+-----------+-----------+
| id | style | process_1 | process_2 | time_proc_1 | time_proc_2 | machine_1 | machine_2 |
+----+---------+-----------+-----------+-------------+-------------+-----------+-----------+
| 1 | WW102 | abcdefghi | jklmnopqr | 0.1 | 0.2 | HF-101 | HF-102 |
| 2 | 70AAG76 | abcdefghi | jklmnopqr | 0.1 | 0.2 | HF-101 | HF-102 |
| 3 | 37542851| jklmnopqr | stuvwxyz0 | 0.2 | 0.3 | HF-102 | HF-103 |
+----+---------+-----------+-----------+-------------+-------------+-----------+-----------+
已经尝试使用此查询
SELECT style,'process_1' AS process, process_1 AS process_desc FROM process_table
UNION ALL
SELECT style,'process_2' AS process, process_2 AS process_desc FROM process_table
UNION ALL
SELECT style,'time_proc_1' AS time, time_proc_1 AS time_min FROM process_table
UNION ALL
SELECT style,'time_proc_2' AS time, time_proc_1 AS time_min FROM process_table
UNION ALL
SELECT style,'machine_1' AS machine, machine_1 AS machine_type FROM process_table
UNION ALL
SELECT style,'machine_2' AS machine, machine_2 AS machine_type FROM process_table
ORDER BY style
结果是：
+---------+-------------+-------------+
| style | process | process_desc|
+---------+-------------+-------------+
| WW102 | process_1 | abcdefghi |
| WW102 | process_2 | jklmnopqr |
| WW102 | time_proc_1 | 0.1 |
| WW102 | time_proc_2 | 0.2 |
| WW102 | machine_1 | HF-101 |
| WW102 | machine_2 | HF-102 |
| 70AAG76 | process_1 | abcdefghi |
| 70AAG76 | process_2 | jklmnopqr |
| 70AAG76 | time_proc_1 | 0.1 |
| 70AAG76 | time_proc_2 | 0.2 |
| 70AAG76 | machine_1 | HF-101 |
| 70AAG76 | machine_2 | HF-102 |
| 37542851| process_1 | jklmnopqr |
| 37542851| process_2 | stuvwxyz0 |
| 37542851| time_proc_1 | 0.2 |
| 37542851| time_proc_2 | 0.3 |
| 37542851| machine_1 | HF-102 |
| 37542851| machine_2 | HF-103 |
+---------+-------------+-------------+
我寻找的结果是这样的：
+---------+-----------+-----------+---------+
| style | process | time_proc | machine |
+---------+-----------+-----------+---------+
| WW102 | abcdefghi | 0.1 | HF-101 |
| WW102 | jklmnopqr | 0.2 | HF-102 |
| 70AAG76 | abcdefghi | 0.1 | HF-101 |
| 70AAG76 | jklmnopqr | 0.2 | HF-102 |
| 37542851| jklmnopqr | 0.2 | HF-102 |
| 37542851| stuvwxyz0 | 0.3 | HF-103 |
+---------+-----------+-----------+---------+
我对mysql的了解有限，所以非常感谢任何帮助。谢谢你