我想查看的这3个是 SceneId,UsersSex = '男'的用户人数,UsersSex = '女'的用户人数。
补充说明一下UsersName是UsersInfo主键,还是ApplyInfo外键。SceneId是ApplyInfo外键
之前发过一个了 = = 求各位大神帮忙
------解决方案--------------------
try
- SQL code
select b.SceneId, 男用户人数=sum(case when a.UsersSex='男' then 1 else 0 end), 女用户人数=sum(case when a.UsersSex='女' then 1 else 0 end)from (select distinct SceneId,username from applyinfo) bjoin usersinfo a on a.a.username=b.usernamegroup by b.SceneId