tb_AA
Id counts
a001 80
a002 80
a003 80
a002 80
a003 80
a003 80
a002 80
a002 80
a002 80
a001 80得到的样式如下;
先是按id 分类汇总 后,再统一求和
tb_AA
ID counts
a001 160
a002 400
a003 240
合计 800能不能用一条sql语句显示出来?
Id counts
a001 80
a002 80
a003 80
a002 80
a003 80
a003 80
a002 80
a002 80
a002 80
a001 80得到的样式如下;
先是按id 分类汇总 后,再统一求和
tb_AA
ID counts
a001 160
a002 400
a003 240
合计 800能不能用一条sql语句显示出来?
from tb_AA
group by Id,with rollup
go
create table [tb_AA]([Id] varchar(4),[counts] int)
insert [tb_AA]
select 'a001',80 union all
select 'a002',80 union all
select 'a003',80 union all
select 'a002',80 union all
select 'a003',80 union all
select 'a003',80 union all
select 'a002',80 union all
select 'a002',80 union all
select 'a002',80 union all
select 'a001',80
go
--select * from [tb_AA]select id=isnull(id,'合计'),counts=sum(counts)
from tb_AA
group by id with rollup
/*
id counts
---- -----------
a001 160
a002 400
a003 240
合计 800(4 行受影响)
*/
select isnull(rtrim(Id),'合计') as Id,sum(counts) as counts
from tb_AA
group by Id with rollup
GROUP by id
union all
select '合计' as id,sum(counts) as counts from tb_aa
union
select '合计' as id ,(select sum(counts) as counts from tb_AA) as counts
if object_id('[tb_AA]') is not null drop table [tb_AA]
go
create table [tb_AA]([Id] varchar(4),[counts] int)
insert [tb_AA]
select 'a001',80 union all
select 'a002',80 union all
select 'a003',80 union all
select 'a002',80 union all
select 'a003',80 union all
select 'a003',80 union all
select 'a002',80 union all
select 'a002',80 union all
select 'a002',80 union all
select 'a001',80
goselect ID=ISNULL(Id,'合计'),SUM(counts)as counts from tb_AA group by Id with rolluprollup是做汇总来用的
from tb_AA
group by id with rollup
用 ROLLUP 汇总数据
在生成包含小计和合计的报表时,ROLLUP 运算符很有用。ROLLUP 运算符生成的结果集类似于 CUBE 运算符所生成的结果集。有关更多信息.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。
例如,简单表 Inventory 中包含:
Item Color Quantity
-------------------- -------------------- --------------------------
Table Blue 124
Table Red 223
Chair Blue 101
Chair Red 210
下列查询将生成小计报表:
SELECT CASE WHEN (GROUPING(Item) = 1) THEN 'ALL'
ELSE ISNULL(Item, 'UNKNOWN')
END AS Item,
CASE WHEN (GROUPING(Color) = 1) THEN 'ALL'
ELSE ISNULL(Color, 'UNKNOWN')
END AS Color,
SUM(Quantity) AS QtySum
FROM Inventory
GROUP BY Item, Color WITH ROLLUPItem Color QtySum
-------------------- -------------------- --------------------------
Chair Blue 101.00
Chair Red 210.00
Chair ALL 311.00
Table Blue 124.00
Table Red 223.00
Table ALL 347.00
ALL ALL 658.00 (7 row(s) affected)
如果查询中的 ROLLUP 关键字更改为 CUBE,那么 CUBE 结果集与上述结果相同,只是在结果集的末尾还会返回下列两行:
ALL Blue 225.00
ALL Red 433.00
CUBE 操作为 Item 和 Color 中值的可能组合生成行。例如,CUBE 不仅报告与 Item 值 Chair 相组合的 Color 值的所有可能组合(Red、Blue 和 Red + Blue),而且报告与 Color 值 Red 相组合的 Item 值的所有可能组合(Chair、Table 和 Chair + Table)。 对于 GROUP BY 子句中右边的列中的每个值,ROLLUP 操作并不报告左边一列(或左边各列)中值的所有可能组合。例如,ROLLUP 并不对每个 Color 值报告 Item 值的所有可能组合。 ROLLUP 操作的结果集具有类似于 COMPUTE BY 所返回结果集的功能;然而,ROLLUP 具有下列优点: ROLLUP 返回单个结果集;COMPUTE BY 返回多个结果集,而多个结果集会增加应用程序代码的复杂性。
ROLLUP 可以在服务器游标中使用;COMPUTE BY 不可以。
有时,查询优化器为 ROLLUP 生成的执行计划比为 COMPUTE BY 生成的更为高效。
from tb_AA
group by Id,with rollup
insert into @tb_AA([Id],[counts])
select 'a001',80 union all
select 'a002',80 union all
select 'a003',80 union all
select 'a002',80 union all
select 'a003',80 union all
select 'a003',80 union all
select 'a002',80 union all
select 'a002',80 union all
select 'a002',80 union all
select 'a001',80select [Id],sum([counts]) as [counts] from @tb_AA group by [Id]
union
select '合计',sum([counts]) from @tb_AA Id counts
a001 160
a002 400
a003 240
合计 800