SQL Server中Rollup关键字使用技巧

首先创建测试表、添加数据。

createtable #t(a int,b int,c int,d int,e int)
insertinto #t values(1,2,3,4,5)
insertinto #t values(1,2,3,4,6)
insertinto #t values(1,2,3,4,7)
insertinto #t values(1,2,3,4,8)
insertinto #t values(1,3,3,4,5)
insertinto #t values(1,3,3,4,6)
insertinto #t values(1,3,3,4,8)
insertinto #t values(1,3,3,4,7)

insertinto #t values(2,2,2,4,5)
insertinto #t values(2,2,3,4,6)
insertinto #t values(2,2,4,4,7)
insertinto #t values(2,2,5,4,8)
insertinto #t values(2,3,6,4,5)
insertinto #t values(2,3,3,4,6)
insertinto #t values(2,3,3,4,8)
insertinto #t values(2,3,3,4,7)

情况一：只有一个分类汇总列时，只需要一个合计。只需要增加with rollup即可。

selectcasewhengrouping(a)=1then'合计'elsecast(a asvarchar) end a,
sum(b),sum(c),sum(d),sum(e) from #t groupby a with rollup

情况二:有多个分类汇总列，只需要一个合计.增加rollup之后，需要增加判断。

selectcasewhengrouping(a)=1then'合计'elsecast(a asvarchar) end a,
b,
sum(c),sum(d),sum(e) from #t
groupby a,b with rollup
havinggrouping(b)=0orgrouping(a)=1

selectcasewhengrouping(a)=1then'合计'elsecast(a asvarchar) end a,
b,
c,
sum(d),sum(e) from #t
groupby a,b,c with rollup
havinggrouping(c)=0orgrouping(a)=1

情况三：有多个分类汇总列，需要全部的小计和合计。

selectcasewhengrouping(a)=1then'合计'elsecast(a asvarchar) end a,
casewhengrouping(b)=1andgrouping(a)=0then'小计'elsecast(b asvarchar) end b,
casewhengrouping(c)=1andgrouping(b)=0then'小计'elsecast(c asvarchar) end c,
sum(d),sum(e) from #t
groupby a,b,c with rollup

另外一种显示小计的方式

selectcasewhengrouping(a)=1then'合计'
whengrouping(b)=1thencast(a asvarchar)+'小计'
elsecast(a asvarchar) end a,
casewhengrouping(b)=0andgrouping(c)=1
thencast(b asvarchar)+'小计'elsecast(b asvarchar) end b,
casewhengrouping(c)=1andgrouping(b)=0
then''elsecast(c asvarchar) end c,
sum(d),sum(e) from #t
groupby a,b,c with rollup

情况四：有多个分类汇总列，需要部分的小计和合计

selectcasewhengrouping(a)=1then'合计'elsecast(a asvarchar) end a,
b,
casewhengrouping(c)=1andgrouping(b)=0then'小计'elsecast(c asvarchar) end c,
sum(d),sum(e) from #t
groupby a,b,c with rollup
havinggrouping(a)=1orgrouping(b)=0

selectcasewhengrouping(a)=1then'合计'elsecast(a asvarchar) end a,
casewhengrouping(b)=1andgrouping(a)=0then'小计'elsecast(b asvarchar) end b,
c,
sum(d),sum(e) from #t
groupby a,b,c with rollup
havinggrouping(a)=1orgrouping(b)=1orgrouping(c)=0

 

本文转自：http://www.cnblogs.com/yiway/archive/2007/11/12/957281.html