标签：统计 count 方法 select ble bsp sql sele null
在表中分别统计mt =0 和 mt>0 的个数
方法一：select count(if(mt=0,1,null)) as a,count(if(mt>0,1,null)) as b from table
方法二：select sum(mt=0) as a,sum(mt>0) as b from table
标签：统计 count 方法 select ble bsp sql sele null
原文地址：https://www.cnblogs.com/hapic/p/10341301.html
