MySQL - 使用group by（数据透视表）行到列（动态）

Question

我有下表'draftWorker'

select * from draftWorker;

+--------+----------+
| draftID| WorkerID | 
+--------+----------+
|      7 | 8280     |      
|      7 | 7794     |       
|      7 | 4633     |       
|    587 | 8280     |
|    587 | 4633     |
+--------+----------+

以下查询给出了以下结果。

SELECT draftID, GROUP_CONCAT(DISTINCT CONCAT(WorkerID)) AS Workers FROM 
draftWorker
GROUP BY draftID;

+-----------+----------------+
| draftID   | Workers        | 
+-----------+----------------+
|      7    | 8280,7794,4633 |      
|     587   | 8280,4633      |
+-----------+----------------+

但实际上我需要这个

+-----------+---------+---------+---------+
| draftID   | Worker1 | Worker2 | Worker3 |
+-----------+---------+---------+---------+
|      7    | 8280    | 7794    | 4633    |
|     587   | 8280    | 4633    |         |
+-----------+---------+-------------------+

有什么想法吗？

[编辑]

还尝试了以下sql。还有很长的路要走。

SELECT draftID, Workers From (
SELECT  @position := 0, draftID, 
GROUP_CONCAT(DISTINCT CONCAT(WorkerID, ' As WorkerID', (@position := 
@position + 1) )) As Workers
FROM draftWorker
GROUP BY draftID) AS C;

+-----------+--------------------------------------------------------+
| draftID   | Workers                                                | 
+-----------+--------------------------------------------------------+
|      7    | 8280 As WorkerID1,7794 As WorkerID2,4633 As WorkerID3  |      
|     587   | 8280 As WorkerID1,4633 As WorkerID2                    |
+-----------+--------------------------------------------------------+

Answer 1

看看这个：

MySQL pivot row into dynamic number of columns

而且：

http://www.boynux.com/creating-pivot-reports-in-mysql/

就我所知，MySQL还没有PIVOT功能。

如果您在使用这些方法时需要任何帮助，请留下评论，我可以在有空的时候添加示例。