mysql统计每类图书的价格总和怎么算

selecti.uid,sum(ifnull(deposit,0)+ifnull(ddeposit,0)+ifnull(money,0))asallmoney

frompw_memberinfoileftjoinpw_membersmonm.uid=i.uidleftjoinpw_memberdatadoni.uid=d.uid

whereifnull(deposit,0)+ifnull(ddeposit,0)+ifnull(money,0)>2000

1、创建测试表，

create table test_person(id int, RMB int)

2、插入测试数据

insert into test_person values(1,180)

insert into test_person values(2,170)

insert into test_person values(3,290)

insert into test_person values(4,160)

insert into test_person values(5,299)

insert into test_person values(6,266)

insert into test_person values(7,155)

3、查询表中所有记录，select t.* from test_person t，

4、编写sql，汇总每个vip类型的用户数，

select vip_type, count(distinct id)

from (select case when RMB>100 and RMB<200 then 'VIP1' when RMB>200 then 'VIP2' end as vip_type, id

        from test_person) t

group by vip_type

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