使用多种条件从表中选择

Question

我有下表：

| id | market | source | event |
+----+--------+--------+-------+
| 1  |   1    |   1    |   1   |
| 2  |   1    |   2    |   1   |
| 3  |   2    |   1    |   1   |
| 4  |   3    |   1    |   2   |
| 5  |   1    |   3    |   1   |

我希望能够选择行（市场= 1 AND事件= 1）以及行（市场= 3 AND事件= 2）的行。 有人可以指出我正确的方向吗？

Answer 1

这应该是您需要的选择：

select * from `table` where  (market = 1 AND event = 1) or (market = 3 AND event = 2)

Answer 2

其中（市场= 1 AND事件= 1）还可以将上述（市场= 3 AND事件= 2）转换为

WHERE (market = 1 AND event = 1)  OR (market = 3 AND event = 2)

Answer 3

在此处将t_table替换为您的表名：

Select * from t_table where (market = 1 and event = 1) or (market = 3 and event = 2)

Answer 4

尝试这个：

SELECT source 
FROM tableA 
WHERE (market = 1 AND event = 1)  OR 
      (market = 3 AND event = 2) 
GROUP BY source 
HAVING COUNT(1) = 2;