0
請有人建議如何根據表A和表B信息爲下面的結果編寫一個mySQL查詢。MySQL數據庫加入查詢
Table A
=======
ID | Product
------------
1 | A
2 | B
3 | C
Table B
=======
ID | Link | Extra Field | Extra Value
-------------------------------------
1 | 1 | Tax | Yes
2 | 1 | Photo | No
3 | 2 | Tax | Yes
4 | 2 | Photo | Yes
5 | 3 | Tax | No
6 | 3 | Photo | Yes
Result
======
Product | Tax | Photo
---------------------
A | Yes | No
B | Yes | Yes
C | No | Yes