我正在尝试在sql server 2005中使用group by with rollup子句但我遇到了一些问题。
这是一个简单的转储
create table group_roll (
id int identity,
id_name int,
fname varchar(50),
surname varchar(50),
qty int
)
go
insert into group_roll (id_name,fname,surname,qty) values (1,'john','smith',10)
insert into group_roll (id_name,fname,surname,qty) values (1,'john','smith',30)
insert into group_roll (id_name,fname,surname,qty) values (2,'frank','white',5)
insert into group_roll (id_name,fname,surname,qty) values (1,'john','smith',8)
insert into group_roll (id_name,fname,surname,qty) values (2,'frank','white',10)
insert into group_roll (id_name,fname,surname,qty) values (3,'rick','black',10)
go
如果我运行这个简单的查询
select id_name,fname,surname,sum(qty) as tot
from group_roll
group by id_name,fname,surname
我得到了
1 john smith 48
2 frank white 15
3 rick black 10
我想要
1 john smith 48
2 frank white 15
3 rick black 10
Total 73
这是我试图实现目标的原因
select
case when grouping(id_name) = 1 then 'My total' else cast(id_name as char) end as Name_id ,
fname,surname,sum(qty) as tot
from group_roll
group by id_name,fname,surname
with rollup
order by case when id_name is null then 1 else 0 end, tot desc
但我的结果是
1 john smith 48
1 john NULL 48
1 NULL NULL 48
2 frank white 15
2 frank NULL 15
2 NULL NULL 15
3 rick black 10
3 rick NULL 10
3 NULL NULL 10
My total NULL NULL 73
我的错误在哪里?
修改即可。 我可以解决我的问题
select * from (
select cast(id_name as char) as id_name,fname,surname,sum(qty) as tot
from group_roll
group by id_name,fname,surname
union
select 'Total',null,null,sum(qty) from group_roll ) as t
order by case when id_name = 'Total' then 1 else 0 end,tot desc
但我想了解汇总是否可以解决我的问题。
答案 0 :(得分:3)
您不能在语句本身内执行此操作,但是您可以过滤除{6}之外的中间汇总的ROLLUP
集合,即分组中的任何一行但不是所有行:
select
case when grouping(id_name) = 1 then 'My total' else cast(id_name as char) end as Name_id,
fname,
surname,
sum(qty) as tot
from group_roll
group by id_name, fname, surname
with rollup
having grouping(id_name) + grouping(fname) + grouping(surname) in (0 , 3)
或类似于您的解决方案,但引用原始查询;
;with T as (
select cast(id_name as varchar(128)) as id_name,fname,surname,sum(qty) as tot
from group_roll
group by id_name,fname,surname
) select * from T union all select 'Total:',null,null, SUM(tot) from T
FWIW SQL 2008允许;
select
case when grouping(id_name) = 1 then 'My total' else cast(id_name as char) end as Name_id,
fname,
surname,
sum(qty) as tot
from group_roll
group by grouping sets((id_name, fname, surname), ())