T-SQL排序，重复数据的剔除保留，分页存储过程

select * from score

--剔除重复项

select distinct(score) from score

--保留重复项(注意：with ties 必须和 top...order by 一起使用)

select top 1 with ties score from score

order by score desc

-- newid()

select newid() as '新ID',* from score

-- 根据‘成绩’字段的降序排列生成‘行号’

select row_number() over(order by Score desc) as '行号',

stuID as '学号',Score as '成绩' from Score

-- 根据临时表 temp_Score 的‘行号’rowNum，获得‘行号’在 1-20之间的记录。

with temp_Score as

(

select row_number() over(order by Score desc) as rowNum,

stuID,Score from Score

)

select rowNum as '行号',stuID as '学号',Score as '成绩'

from temp_Score where rowNum between 1 and 20;

-- 按照分数进行排名。(分数相同的并列名次,下一个名次降一名。)

select StuID,Score,

rank() over(order by Score desc) as '名次'

from Score

-- 按照分数进行排名。(分数相同的并列名次,下一个名次不降一名。)

select StuID,Score,

dense_rank() over(order by Score desc) as '名次'

from Score

-- ntile(页数)：用来将整个表进行分页(或分组),

-- 并指定每条记录属于哪一页。

select stuID,Score,

ntile(3) over(order by Score desc) as '页码'

from Score

order by Score Desc

--===================================

-- 使用ntile(页数)分页的存储过程

--===================================

-- 删除存储过程

drop procedure up_Page

go

-- 创建存储过程

create procedure up_Page

@pageCount int, -- 定义每页显示的数据个数

@currentPage int -- 选择当前要显示的数据页

as

select * from (

select ntile((select count(*)/@pageCount from Score))

over(order by StuID) as Page,* from Score

) a where Page=@currentPage

go

--查看结果

exec up_Page 2,3

-- 表示：每页显示2条数据，当前显示第3页。