mysql一条sql查询多个表数据量

时间：2017-09-06 13:50:03 收藏：0 阅读：592

select
(select count(*) from device0 where status != 0),
(select count(*) from device1 where status != 0),
(select count(*) from device2 where status != 0),
(select count(*) from device3 where status != 0),
(select count(*) from device4 where status != 0),
(select count(*) from device5 where status != 0),
(select count(*) from device6 where status != 0),
(select count(*) from device7 where status != 0),
(select count(*) from device8 where status != 0),
(select count(*) from device9 where status != 0)
as count

select
(select count(*) from device0 where status != 0)+
(select count(*) from device1 where status != 0)+
(select count(*) from device2 where status != 0)+
(select count(*) from device3 where status != 0)+
(select count(*) from device4 where status != 0)+
(select count(*) from device5 where status != 0)+
(select count(*) from device6 where status != 0)+
(select count(*) from device7 where status != 0)+
(select count(*) from device8 where status != 0)+
(select count(*) from device9 where status != 0)
as count

原文：http://www.cnblogs.com/changfengSven/p/7484024.html