按 COUNT(*) 过滤?

Filter by COUNT(*)?(按 COUNT(*) 过滤?)

问题描述

是否可以对结果进行分组，然后按组中的行数进行过滤?

Is it possible to group results and then filter by how many rows are in the group?

像这样:

SELECT * FROM mytable WHERE COUNT(*) > 1 GROUP BY name

推荐答案

您想使用 HAVING 对聚合函数进行过滤.

You want to use HAVING to filter on the aggregate function.

SELECT name, COUNT(*)
    FROM mytable
    GROUP BY name
    HAVING COUNT(*) > 1

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