求语句一条
表1:id主键 username 表2:id主键 myid(关注者ID 外键) hid(被关注者ID 外键)给定某一用户ID 查询他关注的人有多少关注者。结果:username number(被关注的数量)
select c.username, COUNT(*) as numberfrom 表2 as ainner join 表2 as b on a.hid=b.myidinner join 表1 as c on c.ID=b.myidwhere a.myid='用户ID'--这用户名时group by c.username
[解决办法]