+------+------+------------+------+
| id | type| design| location |
+------+------+------------+------+
| 1 | abc | A | Location X |
| 2 | abc | A | Location Y |
| 3 | def | A | Location X |
+------+------+------------+------+
+------+------+------------+------+
| id | ty
阅读背景：
两行中都存在具有值的返回行
来源：互联网
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