SELECT count(DISTINCT type) as count ,dms_warehouse_id as whId from bms_warehouse_supplies where dms_warehouse_id in (1,2,3) GROUP BY dms_warehouse_id mysql版本需要4.0以上 来源：博客园作者：DD1024链接：https://www.cnblogs.com/ODOD/p/11532633.html 标签 mysql mysql去重
