我是mysql的新手，需要帮助将行转换为mysql数据库中的列 我已经介绍了一些转置的例子，但在使用正确的语法方面有些困惑 一些现有的答案增加了额外的要求，使其略有不同
我的退出表是行，并且行多于共享少数行以供解释
+----------+-----------+--------+----------+-----------+--------+
| Item | YEAR | Sales | Profit | TSV | REC |
+----------+-----------+--------+----------+-----------+--------+
| machine | 2011 | 10| 10 | 20 | 10 |
| machine | 2010 | 8 | 15 | 6 | 2 |
| machine | 2013 | 15| 5 | 11 | 5 |
| machine | 2009 | 3 | 8 | 9 | 13 |
| machine | 2012 | 6 | 12 | 18 | 16 |
| decors | 2010 | 11| 10 | 13 | 22 |
| decors | 2011 | 9 | 9 | 16 | 12 |
| decors | 2012 | 3 | 7 | 11 | 9 |
| decors | 2013 | 13| 23 | 9 | 10 |
| decors | 2009 | 4 | 9 | 10 | 8 |
| sp parts | 2009 | 22| 25 | 17 | 22 |
| sp parts | 2010 | 21| 22 | 11 | 14 |
| sp parts | 2011 | 28| 30 | 29 | 23 |
| sp parts | 2012 | 23| 28 | 12 | 8 |
| sp parts | 2013 | 21| 24 | 24 | 32 |
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和预期表
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| Item machine machine machine machine machine decors decors decors decors decors sp parts sp parts sp parts sp parts sp parts |
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| YEAR 2011 2010 2013 2009 2012 2010 2011 2012 2013 2009 2009 2010 2011 2012 2013 |
| Sales 10 8 15 3 6 11 9 3 13 4 22 21 28 23 21 |
| Profit 10 15 5 8 12 10 9 7 23 9 25 22 30 28 24 |
| TSV 20 6 11 9 18 13 16 11 9 10 17 11 29 12 24 |
| REC 10 2 5 13 16 22 12 9 10 8 22 14 23 8 32 |
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有人可以帮助解决这个问题