MYSQL单表中各记录总和统计 适用于报表

用case when then else 语句，用法如同if. select sum(if(id<500,1,0)) as A,sum(if(id>=500 && id<1000,1,0)) as B from customer;  +---+-----+ | A | B   | +---+-----+ | 4 | 204 | +---+-----+ 1 row in setspa     这样是

>>阅读原文<<