表结构
id date customiD
1 2014-07-08 001
1 2014-07-08 002
1 2014-07-08 003
1 2014-07-09 003
怎么从该表中得出每日的顾客数量?谢谢
------解决思路----------------------
SELECT date,
COUNT(DISTINCT customiD) 不重复顾客数量,
COUNT(*) 顾客人次
FROM table1
GROUP BY date
你要哪个数量自己挑。
------解决思路----------------------
SELECT id,date,COUNT(customiD)人次
,COUNT(DISTINCT customiD)人数
FROM GROUP BY id,date
------解决思路----------------------
create table #TT(
[id] int not null,
[date] date not null,
[customid] varchar(10) not null
)
insert into #TT
select 1,'2014-07-08','001' union all
select 1,'2014-07-08','002' union all
select 1,'2014-07-08','003' union all
select 1,'2014-07-09','003'
select [date],count(distinct customid) as qty from #TT group by [date]
/* 结果
date qty
2014-07-08 3
2014-07-09 1
*/
------解决思路----------------------
LZ 可能是要的是人次,一个会员天来 8 回,就算 8 个。
------解决思路----------------------
with a(id,date,customid) as
(select 1,'2014-07-08','001' union all
select 1,'2014-07-08','002' union all
select 1,'2014-07-08','003' union all
select 1,'2014-07-09','003')
select date,customid,COUNT(*) pty from a group by customid,date
------解决思路----------------------
SELECT
date
,COUNT(DISTINCT customiD) 人数
,COUNT(*) 人次
FROM tb1
GROUP BY date