SQL Server中Rollup关键字使用技巧

SQL Server中Rollup关键字使用技巧

首先创建测试表、添加数据。


create table #t(a int,b int,c int,d int,e int)


insert into #t values(1,2,3,4,5)


insert into #t values(1,2,3,4,6)


inser tinto #t values(1,2,3,4,7)


insert into #t values(1,2,3,4,8)


insert into #t values(1,3,3,4,5)


insert into #t values(1,3,3,4,6)


inser tinto #t values(1,3,3,4,8)


inser tinto #t values(1,3,3,4,7)




insert into #t values(2,2,2,4,5)


insert into #t values(2,2,3,4,6)


insert into #t values(2,2,4,4,7)


insert into #t values(2,2,5,4,8)


insert into #t values(2,3,6,4,5)


insert into #t values(2,3,3,4,6)


insert into #t values(2,3,3,4,8)


insert into #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。


select case when grouping(a)=1then'合计'else cast(a as varchar) 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。


select case when grouping(a)=1 then'合计'else cast(a as varchar) end a,


b,


sum(c),sum(d),sum(e) from #t


group by a,b with rollup


having grouping(b)=0 o rgrouping(a)=1

selec tcase when grouping(a)=1 then '合计' else cast(a as varchar) end a,


b,


c,


sum(d),sum(e) from #t


group by a,b,c with rollup


having grouping(c)=0 or grouping(a)=1
情况三：有多个分类汇总列，需要全部的小计和合计。


select case when grouping(a)=1 then '合计 ' else cast(a as varchar) end a,


case when grouping(b)=1 and grouping(a)=0 then'小计'else cast(b as varchar) end b,


case when grouping(c)=1 and grouping(b)=0then'小计'else cast(c as varchar) end c,


sum(d),sum(e) from #t


group by a,b,c with rollup
另外一种显示小计的方式


selectc ase when grouping(a)=1then'合计'


when grouping(b)=1then cast(a as varchar)+'小计'


else cast(a as varchar) end a,


case when grouping(b)=0 and grouping(c)=1


then cast(b as varchar)+'小计'else cast(b as varchar) end b,


case when grouping(c)=1 and grouping(b)=0


then ''else cast(c as varchar) end c,


sum(d),sum(e) from #t


group by 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


select cas ewhen grouping(a)=1 then'合计'else cast(a as varchar) end a,


b,


case when grouping(c)=1and grouping(b)=0then'小计'else cast(c as varchar) end c,


sum(d),sum(e) from #t


group by a,b,c with rollup


having grouping(a)=1or grouping(b)=0


select case when grouping(a)=1then'合计'else cast(a as varchar) end a,


case when grouping(b)=1and grouping(a)=0 then'小计'else cast(b as varchar) end b,


c,


sum(d),sum(e) from #t


group by a,b,c with rollup


having grouping(a)=1 or grouping(b)=1 or grouping(c)=0