Mysql 从重复项中计算唯一值

我的表上有以下数据

Uid | comm | status
-------------------
12    23     eve
15    23     eve
20    23     mon
12    23     mon
20    23     eve
17    23     mon

如何查询以获得下面的结果以避免重复，并确保如果我为“eve”计算uid，并且相同的uid出现在“mon”上，则只为“eve”计算uid

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谢谢你的帮助

您可以使用以下查询来选择每个

Uid

值一次：

SELECT Uid, MIN(status)
FROM mytable
GROUP BY Uid

输出：

Uid MIN(status)
---------------
12  eve
15  eve
17  mon
20  eve

使用上述查询，您可以得到如下所需的结果：

SELECT status, count(*)
from (
   SELECT Uid, MIN(status) AS status
   FROM mytable
   GROUP BY Uid ) AS t
GROUP BY status

---

您可以使用以下查询来选择每个

Uid

值一次：

SELECT Uid, MIN(status)
FROM mytable
GROUP BY Uid

输出：

Uid MIN(status)
---------------
12  eve
15  eve
17  mon
20  eve

使用上述查询，您可以得到如下所需的结果：

SELECT status, count(*)
from (
   SELECT Uid, MIN(status) AS status
   FROM mytable
   GROUP BY Uid ) AS t
GROUP BY status