我在一个MySQL数据库中有7列数据。Year1列属于Revenue1列。以下列具有相同的结构。我知道如何在SQL中处理这个问题,但在PDI中却不知道。有谁能描述一下是怎么做的吗?
mySQL表结构
+--------+-------+-------+-------+----------+----------+----------+
| Ticker | Year1 | Year2 | Year3 | Revenue1 | Revenue2 | Revenue3 |
+--------+-------+-------+-------+----------+----------+----------+
| | | | | | | |
| ABC | 2010 | 2011 | 2012 | 250000 | 500000 | 1000000 |
+--------+-------+-------+-------+----------+----------+----------+所需的PDI标准化输出:
+------------+------+-----------+---------+
| Ticker | Year | Keyfigure | Value |
+------------+------+-----------+---------+
| | | | |
| ABC | 2010 | Revenue | 250000 |
| | | | |
| ABC | 2011 | Revenue | 500000 |
| | | | |
| ABC | 2012 | Revenue | 1000000 |
+------------+------+-----------+---------+发布于 2015-01-30 22:18:10
你有没有试过使用行反正规化?
https://stackoverflow.com/questions/27827272
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