我想获取多行之间的时间差
Sl_id ID ShortLeave createddate
15 8 2015-10-02 13:10:07 2015-02-11 16:08:01
16 8 2015-10-02 14:05:07 2015-02-11 16:08:01
我需要通过 where Id=1
获取短假差异过滤器。我试过了
SELECT timediff(A.shortleave,B.shortleave) AS timedifference
FROM shortL A JOIN shortL B ON B.id = A.id
where A.Id=1
group by A.ID,A.ShortLeave ;
但我有两行
'00:00:00'
'00:55:00'
发生这种情况是因为Sl_id
。所以请帮助我如何为多行只获取一行。
最佳答案
我改变了我的查询
SELECT timediff(A.shortleave,B.shortleave) AS timedifference
FROM shortL A JOIN shortL B ON B.id = A.id
where A.Id=1
group by A.ID,A.ShortLeave order by timedifference desc limit 1;
通过这样做,我总是能得到最新的专栏。在此我只得到 '00:55:00'
结果,没关系。
关于mysql - 按行的时差,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28452450/