1
查询表以输出结果如下所示的最有效方法是什么?查询结果取决于来自单独查询的结果
表:
+-----+----------+-----+
| PN | date | QTY |
+-----+----------+-----+
| AB1 | 01/12/14 | 4 |
| AB2 | 01/12/14 | 2 |
| AB3 | 01/12/14 | 7 |
| AB1 | 01/22/14 | 8 |
| AB3 | 01/25/14 | 3 |
| AB5 | 01/25/14 | 9 |
+-----+----------+-----+
结果:
+-----+----------+----------+----------+
| | 01/12/14 | 01/22/14 | 01/25/14 |
+-----+----------+----------+----------+
| AB1 | 4 | 8 | 0 |
| AB2 | 2 | 0 | 3 |
| AB5 | 7 | 0 | 9 |
+-----+----------+----------+----------+
'选择PN,日期,数量从表顺序由PN,date' – 2014-01-14 03:24:55
@Dagon这不会转动的数据,在问题中指出。它会简单地命令结果... –
然后可以简单地在PHP输出中完成 – 2014-01-14 03:36:58