创建实验环境表:
create table a(
code int,
cname varchar(10)
)
create table b(
zID int identity,
code int,
iDate datetime,
days float
)insert into a values(1,'aaa')
insert into a values(2,'bbb')
insert into a values(3,'ccc')insert into b values(1,'2007-4-12',0.5)
insert into b values(2,'2007-4-25',0.5)
insert into b values(3,'2007-6-12',4)
insert into b values(1,'2007-5-13',25)
insert into b values(2,'2007-3-12',14)
insert into b values(3,'2007-7-12',14)
insert into b values(1,'2007-2-20',7)
insert into b values(2,'2007-4-12',6)
insert into b values(3,'2007-6-12',4)
insert into b values(3,'2007-5-12',8)我现在想得到的一个查询结果集的样式是
code, cname,1月份天数,2月天数,...一直到12月, 天数合计
我这样写只能得到汇总的总和,怎么改一下呢?
select a.code,m.days from a left join
(
select code,days=sum(days) from b group by code --这里先把B表的资料汇总起来,然后
--实现和a表的查询...
)m on a.code=m.code
create table a(
code int,
cname varchar(10)
)
create table b(
zID int identity,
code int,
iDate datetime,
days float
)insert into a values(1,'aaa')
insert into a values(2,'bbb')
insert into a values(3,'ccc')insert into b values(1,'2007-4-12',0.5)
insert into b values(2,'2007-4-25',0.5)
insert into b values(3,'2007-6-12',4)
insert into b values(1,'2007-5-13',25)
insert into b values(2,'2007-3-12',14)
insert into b values(3,'2007-7-12',14)
insert into b values(1,'2007-2-20',7)
insert into b values(2,'2007-4-12',6)
insert into b values(3,'2007-6-12',4)
insert into b values(3,'2007-5-12',8)我现在想得到的一个查询结果集的样式是
code, cname,1月份天数,2月天数,...一直到12月, 天数合计
我这样写只能得到汇总的总和,怎么改一下呢?
select a.code,m.days from a left join
(
select code,days=sum(days) from b group by code --这里先把B表的资料汇总起来,然后
--实现和a表的查询...
)m on a.code=m.code
a.code,
a.cname,
SUM(Case Month(iDate) When 1 Then 1 Else 0 End) As [1月份天数],
SUM(Case Month(iDate) When 2 Then 1 Else 0 End) As [2月份天数],
SUM(Case Month(iDate) When 3 Then 1 Else 0 End) As [3月份天数],
SUM(Case Month(iDate) When 4 Then 1 Else 0 End) As [4月份天数],
SUM(Case Month(iDate) When 5 Then 1 Else 0 End) As [5月份天数],
SUM(Case Month(iDate) When 6 Then 1 Else 0 End) As [6月份天数],
SUM(Case Month(iDate) When 7 Then 1 Else 0 End) As [7月份天数],
SUM(Case Month(iDate) When 8 Then 1 Else 0 End) As [8月份天数],
SUM(Case Month(iDate) When 9 Then 1 Else 0 End) As [9月份天数],
SUM(Case Month(iDate) When 10 Then 1 Else 0 End) As [10月份天数],
SUM(Case Month(iDate) When 11 Then 1 Else 0 End) As [11月份天数],
SUM(Case Month(iDate) When 12 Then 1 Else 0 End) As [12月份天数],
Count(*) As [天数合计]
From
a
Inner Join
b
On
A.code = B.code
Group By
a.code,
a.cname
code int,
cname varchar(10)
)
create table b(
zID int identity,
code int,
iDate datetime,
days float
)insert into a values(1,'aaa')
insert into a values(2,'bbb')
insert into a values(3,'ccc')insert into b values(1,'2007-4-12',0.5)
insert into b values(2,'2007-4-25',0.5)
insert into b values(3,'2007-6-12',4)
insert into b values(1,'2007-5-13',25)
insert into b values(2,'2007-3-12',14)
insert into b values(3,'2007-7-12',14)
insert into b values(1,'2007-2-20',7)
insert into b values(2,'2007-4-12',6)
insert into b values(3,'2007-6-12',4)
insert into b values(3,'2007-5-12',8)
GO
Select
a.code,
a.cname,
SUM(Case Month(iDate) When 1 Then 1 Else 0 End) As [1月份天数],
SUM(Case Month(iDate) When 2 Then 1 Else 0 End) As [2月份天数],
SUM(Case Month(iDate) When 3 Then 1 Else 0 End) As [3月份天数],
SUM(Case Month(iDate) When 4 Then 1 Else 0 End) As [4月份天数],
SUM(Case Month(iDate) When 5 Then 1 Else 0 End) As [5月份天数],
SUM(Case Month(iDate) When 6 Then 1 Else 0 End) As [6月份天数],
SUM(Case Month(iDate) When 7 Then 1 Else 0 End) As [7月份天数],
SUM(Case Month(iDate) When 8 Then 1 Else 0 End) As [8月份天数],
SUM(Case Month(iDate) When 9 Then 1 Else 0 End) As [9月份天数],
SUM(Case Month(iDate) When 10 Then 1 Else 0 End) As [10月份天数],
SUM(Case Month(iDate) When 11 Then 1 Else 0 End) As [11月份天数],
SUM(Case Month(iDate) When 12 Then 1 Else 0 End) As [12月份天数],
Count(*) As [天数合计]
From
a
Inner Join
b
On
A.code = B.code
Group By
a.code,
a.cname
GO
Drop Table a, b
--Result
/*
code cname 1月份天数 2月份天数 3月份天数 4月份天数 5月份天数 6月份天数 7月份天数 ... 天数合计
1 aaa 0 1 0 1 1 0 0 ... 3
2 bbb 0 0 1 2 0 0 0 ... 3
3 ccc 0 0 0 0 1 2 1 ... 4
*/
paoluo(一天到晚游泳的鱼)
我先看看
不是要写100句 "SUM(Case Month(iDate) When 12 Then 1 Else 0 End) As [12月份天数]"
paoluo(一天到晚游泳的鱼)
是我想要的,
我咋没想到呢?
'1月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=1 and c.code = d.code),
'2月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=2 and c.code = d.code),
'3月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=3 and c.code = d.code),
'4月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=4 and c.code = d.code),
'5月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=5 and c.code = d.code),
'6月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=6 and c.code = d.code),
'7月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=7 and c.code = d.code),
'8月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=8 and c.code = d.code),
'9月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=9 and c.code = d.code),
'10月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=10 and c.code = d.code),
'11月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=11 and c.code = d.code),
'12月份天数'=(select sum(days) from b as d where datename(mm,d.iDate)=12 and c.code = d.code)
from a as c left join b as e on c.code = e.code