with rollup 、with cube、grouping CUBE 和 ROLLUP 之间的区别在于： CUBE 生成的结果集显示了所选列中值的所有组合的聚合。 ROLLUP 生成的结果集显示了所选列中值的某一层次结构的聚合。 grouping: 当用 CUBE 或 ROLLUP 运算符添加行时，附加的列输出值为1，当所添加的行不是由 CUBE 或 ROLLUP 产生时，附加列值为0。 -------------------------------------------------------------------------------- 首先创建测试表、添加数据。
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)
insert into #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)
insert into #t values(1,3,3,4,8)
insert into #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。
case when grouping(a)=1 then ‘合计‘ else cast(a as varchar) end a,
sum(b),sum(c),sum(d),sum(e) from #t group by 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。
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 or grouping(a)=1
case 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。
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)=0 then ‘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
case when grouping(a)=1 then ‘合计‘
when grouping(b)=1 then 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
case when grouping(a)=1 then ‘合计‘ else cast(a as varchar) end a,
b,
case when grouping(c)=1 and grouping(b)=0 then ‘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)=1 or grouping(b)=0
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,
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
引用：http://www.cnblogs.com/yiway/archive/2007/11/12/957281.html
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