选择已发生三次以上的行

Question

我有一个表active_users，从那里我想选择user_id发生超过2次并且通知= 0的行。只有单个结果

需要查询结果

Id   User_id   Mobile      last_seen              notified
1    25853     XXXXXXXX    14-May-2016 17:11:12   0

Answer 1

SELECT *
FROM active_users
WHERE notified = 0
GROUP BY user_id
HAVING COUNT(id) >2

Answer 2

只需按user_id（以及任何其他可选属性）计算和分组，以及having子句：

SELECT
    user_id,
    mobile,
    max(last_seen) AS last_seen,
    notified,
    count(user_id) AS number_of_records
FROM
    active_users
WHERE
    notified = 0
GROUP BY
    user_id,
    mobile,
    notified
HAVING
    count(user_id) > 2

这将使您所有用户在表格中出现3次以上。