SQL内置函数（pivot）纵转横简析

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SQL内置函数（pivot）纵转横简析

1.创建表：

create table test(id int,name varchar(20),quarter int,profile int))

insert into test values(1,'a',1,1000);

insert into test values(1,'a',2,1000);

insert into test values(1,'a',3,1000);

insert into test values(1,'a',4,1000);

insert into test values(2,'a',1,1000);

insert into test values(2,'a',2,1000);

insert into test values(2,'a',3,1000);

insert into test values(2,'a',4,1000);

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2. Pivot 用法

select id,name,[1] as '1th Season',[2] as '2th Season',[3] as '3th Season',[4] as '4th Season'

from test

pivot

(

sum(profile)

for quarter in ([1],[2],[3],[4])

)as pvt

select * from test

3.Unpivot

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select * from test2

select id,name,quarters,profiles

from test2

unpivot

(

profiles

for quarters in ([Q1],[Q2],[Q3],[Q4])

)

as unpvt

作者 newegg2009