【MySql】存储过程实现循环查询
一、需求查询累计时间段去重的结果select max(date),count(DISTINCT type) '种类数' ,sum(num) '合计' from delwhere date>='2019-10-1' and date<='2019-10-1';select max(date),count(DISTINCT type) '种类数' ,sum(num) '合计' ...
