行转列,列转行
oracle:
----------------------------- 行转列 --------------------------------
select * from demo
create table demo(id int,name varchar(20),nums int); ---- 创建表
insert into demo values(1, ‘苹果‘, 1000);
insert into demo values(2, ‘苹果‘, 2000);
insert into demo values(3, ‘苹果‘, 4000);
insert into demo values(4, ‘橘子‘, 5000);
insert into demo values(5, ‘橘子‘, 3000);
insert into demo values(6, ‘葡萄‘, 3500);
insert into demo values(7, ‘芒果‘, 4200);
insert into demo values(8, ‘芒果‘, 5500);
select * from (select name, nums from demo) pivot (sum(nums) for name in (‘苹果‘ 苹果, ‘橘子‘, ‘葡萄‘, ‘芒果‘));
----------------- 列转行 ----------------------
create table Fruit(id int,name varchar(20), Q1 int, Q2 int, Q3 int, Q4 int);
insert into Fruit values(1,‘苹果‘,1000,2000,3300,5000);
insert into Fruit values(2,‘橘子‘,3000,3000,3200,1500);
insert into Fruit values(3,‘香蕉‘,2500,3500,2200,2500);
insert into Fruit values(4,‘葡萄‘,1500,2500,1200,3500);select * from Fruit
select id , name, jidu, xiaoshou from Fruit unpivot (xiaoshou for jidu in (q1, q2, q3, q4) )
来源: http://www.bubuko.com/infodetail-1980465.html