1、查询状态为0的数据，并且>1的
select uid,count(*) as count from fy_timing where `status`=0 group by uid having count>1
在使用聚合函数之前，我们可以通过 where 对查询加限制条件，那么如果在 group by 之后我们要对分组里面的数据再加限制条件怎么办呢？答案是利用 having。
having 子句可以让我们筛选成组后的各组数据。
where 子句在聚合前先筛选记录，也就是说作用在 GROUP BY 子句和 HAVING 子句前。而 having 子句是在聚合后对组记录进行筛选。
having 子句出现的数据必须在 group by 之后，order by 之后。
对 uid 按照出现次数排序之后，我们还想只查出状态为0的数据，可以这样写：
select uid,count(*) as count from fy_timing where `status`=0 group by uid having count>1 order by `count`
SELECT
uid,
count( * ) AS count
FROM
fy_timing
WHERE
`status` = 0
GROUP BY
uid
HAVING
count > 1
ORDER BY
`count`
