日期:2014-05-16 浏览次数:20835 次
字段如下: id system_Id log_date 1 1021 2012-06-27 15:21:29 2 1021 2012-07-01 12:21:30 3 1021 2012-07-02 17:21:31 4 12 2011-06-27 15:21:30 5 12 2012-06-02 13:29:11 6 12 2012-07-02 13:29:11 7 12 2012-07-02 13:29:11 8 218211 2012-07-02 13:29:11 9 218211 2012-07-02 13:29:12 10 218211 2012-07-02 13:29:13 11 218211 2012-07-02 13:29:14 12 218211 2012-07-02 13:29:15 查询条件为 system_id 当前时间 system_id 为1021 的记录当天、当月、当季度分别有多个行。 system_id 为12的记录当天、当月、当季度分别有多个行。 system_id 为218211的记录当天、当月、当季度分别有多个行。 显示结果为:根据当前时间(2012-06-27)判断 log_date时间 system_id days months quarters 1021 1 1 3 12 1 2 4 218211 0 0 5
select a.system_Id,d,m,q from (select system_Id,count(*) as d from tabl1 where log_date>curdate() group by system_Id) a, (select system_Id,count(*) as m from tabl1 where log_date>curdate() -interval day(curdate())+1 group by system_Id) b, (select system_Id,count(*) as q from tabl1 where quarter(log_date)=quarter(curdate()) group by system_Id) c where a.system_Id=b.system_Id and a.system_Id=c.system_Id