使用 case when 配合 sum来统计。
如图表a2
语句如下:sum部分大意:当时间在区间内sl参加SUM计算,否则sl以0参加SUM计算
select
sum(case when rq >='2015-1-1' and rq < '2015-2-1' then sl else 0 end) as '1月份',
sum(case when rq >='2015-2-1' and rq < '2015-3-1' then sl else 0 end) as '2月份',
sum(case when rq >='2015-3-1' and rq < '2015-4-1' then sl else 0 end) as '3月份'
from a2;
运行结果:
以列方式统计,更为简单:把rq 转换为年+月 格式,再分组即可以。
select year(rq) * 100 + month(rq) as rq, sum(sl) as 'sl'
from a2
group by year(rq) * 100 + month(rq);
select year(trandate) * 100 + month(trandate) as trandate, sum(tranamount) as tranamount
from normaltran
group by year(trandate) * 100 + month(trandate)
结果:
200801 140
200802 45
。。。
如果一定要 2008-01这种格式也可以,作相应的就该就行。
cast(year(trandate) as varchar(5)) + '-' + cast(month(trandate) as varchar(2))
给你个思路 :
08年一月份:
select sum(tranamount) from normaltran where year(trandate)='2008' and month(trandate)='1'and day(trandate)>0 and day(trandate)<32
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SELECT
CAST(YEAR(trandate) as varchar) + '-' + CAST(MONTH(trandate) as varchar) AS trandate ,
SUM( tranamount ) AS tranamount
FROM
normaltran
GROUP BY
CAST(YEAR(trandate) as varchar) + '-' + CAST(MONTH(trandate) as varchar)
select CONVERT(VARCHAR(6),trandate,111) as trandate,sum(tranamount) as tranamount
from normaltran
group by CONVERT(VARCHAR(6),trandate,111)