四大排序函数

 row_number() over(partition by clause order by filed asc|desc )----连续的从1开始到n的排序号

 rank() over ( partition by clause order by filed asc|desc)---不连续的可以出现重复排序号
 

dense_rank() over (partition by clause order by filed asc|desc)--连续的可以出现重复排序号
 

ntile (integer_expression) over (partition by clause order by  filed asc|desc )--连续的可以分组排序并且排序号是连续的

----案例

create table tb (
[year] [int] NOT NULL,
[week] [int] NOT NULL,
[base_goods_id] [int] NOT NULL,
[uid] [bigint] NOT NULL,
[amount] [money] NOT NULL,
[count] [int] NOT NULL,
[bean] [money] NOT NULL
)
insert tb  
select 2013,2,6577,20087,32640.00,1088,26112.00
union all
select 2013,2,6577,20211,39420.00,1314,31536.00
union all
select 2013,2,6577,20220,60.00,2,111.00
union all
select 2013,2,6577,20457,60.00,2,48.00
union all
select 2013,2,6577,20458,60.00,2,48.00
go
select * from tb 
/*
2013	2	6577	20087	32640.00	1088	26112.00
2013	2	6577	20211	39420.00	1314	31536.00
2013	2	6577	20220	60.00	2	111.00
2013	2	6577	20457	60.00	2	48.00
2013	2	6577	20458	60.00	2	48.00
*/

select ROW_NUMBER() over(partition by base_goods_id order by count)rn,* from tb 

/*
rn	year	week	base_goods_id	uid	amount	count	bean
1	2013	2	6577	20220	60.00	2	111.00
2	2013	2	6577	20457	60.00	2	48.00
3	2013	2	6577	20458	60.00	2	48.00
4	2013	2	6577	20087	32640.00	1088	26112.00
5	2013	2	6577	20211	39420.00	1314	31536.00
*/

select dense_rank()over(partition by base_goods_id order by count )rn,* from tb 
/*
rn	year	week	base_goods_id	uid	amount	count	bean
1	2013	2	6577	20220	60.00	2	111.00
1	2013	2	6577	20457	60.00	2	48.00
1	2013	2	6577	20458	60.00	2	48.00
2	2013	2	6577	20087	32640.00	1088	26112.00
3	2013	2	6577	20211	39420.00	1314	31536.00
*/

select rank()over(partition by base_goods_id order by count )rn,* from tb 

/*
1	2013	2	6577	20220	60.00	2	111.00
1	2013	2	6577	20457	60.00	2	48.00
1	2013	2	6577	20458	60.00	2	48.00
4	2013	2	6577	20087	32640.00	1088	26112.00
5	2013	2	6577	20211	39420.00	1314	31536.00
*/

select ntile(2)over(partition by base_goods_id order by count )rn,* from tb 

/*
rn	year	week	base_goods_id	uid	amount	count	bean
1	2013	2	6577	20220	60.00	2	111.00
1	2013	2	6577	20457	60.00	2	48.00
1	2013	2	6577	20458	60.00	2	48.00
2	2013	2	6577	20087	32640.00	1088	26112.00
2	2013	2	6577	20211	39420.00	1314	31536.00
*/