http://www.jbxue.com/db/2292.html
--> 測試數據：[tb]
if object_id('[tb]') is not null drop table [tb]
go
create table [tb]([姓名] varchar(1),[部門] varchar(4),[學歷] varchar(4),[出生年月] datetime)
insert [tb]
select 'A','後勤','高中','1986-1-1' union all
select 'B','後勤','初中','1984-3-7' union all
select 'C','管理','本科','1987-2-1' union all
select 'D','操作','專科','1976-2-1' union all
select 'E','操作','專科','1943-2-1'
--------------開始查詢--------------------------
declare @sql varchar(8000)
set @sql = 'select 部門,dbo.AgeLevel([出生年月]) as 年齡段'
select @sql = @sql + ' , sum(case 學歷 when ''' + 學歷 + ''' then 1 else 0 end) [' + 學歷 + ']'
from (select distinct 學歷 from tb) as a
set @sql = @sql + ' from tb group by 部門,dbo.AgeLevel([出生年月])'
exec(@sql)
/*
部門 年齡段 本科 初中 高中 專科
---- ---------- ----------- ----------- ----------- -----------
管理 21－30 1 0 0 0
後勤 21－30 0 1 1 0
操作 31－40 0 0 0 1
操作 50以上 0 0 0 1
(4 行受影響)
*/
drop function AgeLevel
go
--獲取年齡段
create function AgeLevel(@birthday datetime)
returns varchar(10)
as
begin
declare @AgeLevel varchar(10)
select @AgeLevel=case((datediff(year,@birthday,getdate())-1)/10) when 2 then '21－30' when 3 then '31－40' when 4 then'41－50' else '50以上' end
return @AgeLevel
end
go
select * ,dbo.AgeLevel([出生年月]) as 年齡段 from tb
/*
姓名 部門 學歷 出生年月 年齡段
---- ---- ---- ----------------------- ----------
A 後勤 高中 1986-01-01 00:00:00.000 21－30
B 後勤 初中 1984-03-07 00:00:00.000 21－30
C 管理 本科 1987-02-01 00:00:00.000 21－30
D 操作 專科 1976-02-01 00:00:00.000 31－40
E 操作 專科 1943-02-01 00:00:00.000 50以上
*/
select N'年齡段'=(
case((datediff(year,[出生年月],getdate())-1)/10)
when 2 then '21－30'
when 3 then '31－40'
when 4 then'41－50'
else '50以上'
end),
count(*) as count
from tb
group by (
case((datediff(year,[出生年月],getdate())-1)/10)
when 2 then '21－30'
when 3 then '31－40'
when 4 then'41－50'
else '50以上'
end )
/*
年齡段 count
------ -----------
21－30 3
31－40 1
50以上 1
(3 行受影響)
*/
--以10歲爲遞增
select
cast(f1*10+1 as varchar(3))+'-'+cast(f1*10+10 as varchar(3)) as 年齡段,f2 as 人數
from
(
select datediff(d,[出生年月],getdate())/365/10 as f1,
count(*) as f2
from tb
group by datediff(d,[出生年月],getdate())/365/10) a
order by cast(f1*10+1 as varchar(3))+'-'+cast(f1*10+10 as varchar(3))
/*
年齡段 人數
------- -----------
21-30 3
31-40 1
61-70 1
(3 行受影響)
*/
SELECT
SUM(
CASE WHEN datediff(year, [出生年月], getdate()) BETWEEN 16 AND 20 THEN 1 ELSE 0 END) AS '16-20',
SUM(CASE WHEN datediff(year, [出生年月], getdate()) BETWEEN 21 AND 30 THEN 1 ELSE 0 END) AS '21-30',
SUM(CASE WHEN datediff(year, [出生年月], getdate()) BETWEEN 31 AND 40 THEN 1 ELSE 0 END) AS '31-40',
SUM(CASE WHEN datediff(year, [出生年月], getdate()) BETWEEN 41 AND 50 THEN 1 ELSE 0 END) AS '41-50',
SUM(CASE WHEN datediff(year, [出生年月], getdate()) BETWEEN 51 AND 60 THEN 1 ELSE 0 END) AS '51-60',
SUM(CASE WHEN datediff(year, [出生年月], getdate()) BETWEEN 61 AND 70 THEN 1 ELSE 0 END) AS '61-70'
FROM tb
/*
16-20 21-30 31-40 41-50 51-60 61-70
----------- ----------- ----------- ----------- ----------- -----------
0 3 1 0 0 1
(1 行受影響)
*/
insert into brands values(1 ,'聯想', '北京')
insert into brands values(2 ,'惠普', '美國')
insert into brands values(3 ,'神舟', '深圳')
create table products(id int, brand int, name varchar(10))
insert into products values(1 ,1, '聯想1')
insert into products values(2 ,1, '聯想2')
insert into products values(3 ,2, '惠普1')
insert into products values(4 ,2, '惠普2'
) insertinto products
values(5 ,1,
'聯想3')
insertinto products
values(6 ,3,
'神舟1')
insertinto products
values(7 ,1,
'聯想4')
go
select ID=row_number()over(order by getdate()),
b.產品數量,
a.[brand],
a.[address]
from brands a,
(select [brand],
count([brand])產品數量
from products
group by [brand] )b
where a.[ID]=b.[brand]
order by b.產品數量 desc
select b.id,b1.cnt as 產品數量,b.brand,b.address
from brands b
join
(
select brand,count(brand) cnt
from products
group by brand
) b1
on b1.brand=b.id
id 產品數量 brand address
----------- ----------- ------------------------------ ------------------------------
1 4 聯想 北京
2 2 惠普 美國
3 1 神舟 深圳
(3 行受影響)
select
sum(case when 字段名>=4000 and 字段名<8000 then 1 else 0 end) 別名,
sum(case when 字段名>=8000 then 1 else 0 end) 別名 ,
count(*) as total
from 表名
