一些SQL语句示例

2018-06-24

SQL

如:
表:consume_record
字段:consume (money类型)
date (datetime类型)

请问怎么写四条sql语句分别按日,按周,按月,按季统计消费总量.
如:1月 1200元
2月 3400元
3月 2800元

--按日 
select sum(consume),day([date]) 
 from consume_record where year([date]) = '2006' 
group by day([date]) 

--按周quarter 
select sum(consume),datename(week,[date]) 
from consume_record where year([date]) = '2006' 
group by datename(week,[date]) 

--按月 
select sum(consume),month([date]) 
from consume_record where year([date]) = '2006' 
group by month([date]) 

--按季 
select sum(consume),datename(quarter,[date]) 
from consume_record where year([date]) = '2006' 
group by datename(quarter,[date]) 

 

--指定日期你就看上面的例子变通下呀，无非就是一个聚合函数和Group by 

select [date],sum(consume) from consume_record 
where [date] between '2006-06-01' and '2006-07-10' 
group by [date] 

--2011年每月注册的人数
SELECT CONVERT(CHAR(7), joindate,120), COUNT(*) 
FROM member 
where year(joindate)=2011 
GROUP BY CONVERT(CHAR(7), joindate,120)

--2011年3月每天注册的人数
SELECT CONVERT(CHAR(10), joindate,120), COUNT(*) 
FROM member 
where year(joindate)=2011 and month(joindate)=3 
GROUP BY CONVERT(CHAR(10), joindate,120)


--获取每家公司前一百条新闻的ID
select a.WebNewsID from WebNews as a
where a.WebNewsID in (select top 100 WebNewsID 
from WebNews where Code=a.Code 
order by PageGetTime desc) 
group by a.WebNewsID,a.Code  order by a.Code

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