SQL点滴16—SQL分页语句总结

原文: SQL点滴16—SQL分页语句总结

今天对分页语句做一个简单的总结，他们大同小异的，只要理解其中一个其他的就很好理解了。

　　

使用top选项

select top 10 * from Orders

a where a.orderid not in ( select top 10 orderid from Orders order by orderid) order by a.orderid

　　

使用max函数

这种方法的前提是有唯一值的一个列。

select top 10 * from Orders a

  where a.orderid > ( select MAX (orderid) from ( select top 10 orderid from Orders order by orderid) as orderid)

  order by orderid

　　

使用row_number()

select * from ( select ROW_NUMBER() over ( order by orderid) as rownumber, * from Orders) myresult
where rownumber between 10 and 20

select top 10 * from ( select ROW_NUMBER() over ( order by orderid) as rownumber, * from Orders) myresult
where rownumber > 10

with OrderedResult as (
select * ,ROW_NUMBER() over ( Order by orderid) as rownumber from Orders)
select * from OrderedResult where rownumber between 10 and 20

　　　　

使用rowcount设置

begin
declare @first_id varchar ( 18 ), @startrow int
set rowcount 10
select @first_id = orderid from Orders order by orderid
select * from Orders where orderid > @first_id order by orderid
set rowcount 0
end

　　

使用临时表

begin
declare @pagelowerbound int
declare @pageupperbound int
set @pagelowerbound = 10
set @pageupperbound = 20

create table #pageindex( [ indexid ] int identity ( 1 , 1 ) not null , [ id ] varchar ( 18 ))
declare @sql nvarchar ( 2000 )
set @sql = ' insert into #pageindex([id]) select top ' + CONVERT ( nvarchar , @pageupperbound )
set @sql = @sql + ' orderid from Orders '
execute sp_executesql @sql
select a. * from Orders a inner join #pageindex b on a.orderid = b.id where b.indexid > @pagelowerbound order by b.indexid
drop table #pageindex
end

　　

使用动态存SQL语句

一个分页存储过程，支持多表连接的情况。原理还是使用主键。

USE [PressErp]

GO

/****** Object:  StoredProcedure [dbo].[UP_GetRecordByPageIndex]    Script Date: 05/06/2013 22:00:50 ******/

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

--用途：分页存储过程(对有主键的表效率极高) 

ALTER PROCEDURE [dbo].[UP_GetRecordByPageIndex]

    @tblName      varchar(255),       -- 表名

    @fldName      varchar(255),       -- 主键字段名

    @PageSize     int = 10,           -- 页尺寸

    @PageIndex    int = 1,            -- 页码

    @IsReCount    bit = 0,            -- 返回记录总数, 非 0 值则返回

    @OrderType    bit = 0,            -- 设置排序类型, 非 0 值则降序

    @strWhere     varchar(1000) = '' -- 查询条件 (注意: 不要加 where)

AS

declare @strSQL   varchar(6000)       -- 主语句

declare @strTmp   varchar(100)        -- 临时变量(查询条件过长时可能会出错，可修改100为1000)

declare @strOrder varchar(400)        -- 排序类型

if @OrderType != 0

begin

    set @strTmp = '<(select min'

    set @strOrder = ' order by [' + @fldName +'] desc'

end

else

begin

    set @strTmp = '>(select max'

    set @strOrder = ' order by [' + @fldName +'] asc'

end

set @strSQL = 'select top ' + str(@PageSize) + ' * from ['

    + @tblName + '] where [' + @fldName + ']' + @strTmp + '(['

    + @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' ['

    + @fldName + '] from [' + @tblName + ']' + @strOrder + ') as tblTmp)'

    + @strOrder

if @strWhere != ''

    set @strSQL = 'select top ' + str(@PageSize) + ' * from ['

        + @tblName + '] where [' + @fldName + ']' + @strTmp + '(['

        + @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' ['

        + @fldName + '] from [' + @tblName + '] where ' + @strWhere + ' '

        + @strOrder + ') as tblTmp) and ' + @strWhere + ' ' + @strOrder

if @PageIndex = 1

begin

    set @strTmp =''

    if @strWhere != ''

        set @strTmp = ' where ' + @strWhere

    set @strSQL = 'select top ' + str(@PageSize) + ' * from ['

        + @tblName + ']' + @strTmp + ' ' + @strOrder

end

if @IsReCount != 0

    set @strSQL = 'select count(*) as Total from [' + @tblName + ']'+' where ' + @strWhere

exec (@strSQL)

 

USE [Press]

GO



/****** Object:  StoredProcedure [dbo].[UP_GetRecordByPage]    Script Date: 09/16/2012 00:26:26 ******/

SET ANSI_NULLS ON

GO



SET QUOTED_IDENTIFIER ON

GO







--用途：支持任意排序的分页存储过程 

CREATE PROCEDURE [dbo].[UP_GetRecordByPage]

@tblName1 varchar(255),   -- 主表名 School

@tblName2 varchar(500),        -- 次表以及连接School left join City on School.CityID=City.ID left join County on School.CountyID=County.ID

@fldName varchar(255),   -- 显示字段名 

@OrderfldName varchar(255), -- 排序字段名,只能与一个排序字段名School.ID 

@PageSize int = 10,   -- 页尺寸 

@PageIndex int = 1,   -- 页码 

@IsReCount bit = 1,  -- 返回记录总数, 非 0 值则返回 

@OrderType bit = 0,   -- 设置排序类型, 非 0 值则降序 

@strWhere varchar(1000)='', -- 查询条件 (注意: 不要加 where) 'School.SchoolName like ''%浙江%'''

@IsPrint bit=0       --是否打印

AS



declare @strSQL varchar(6000) -- 主语句 

declare @strTmp varchar(1000)   -- 临时变量(查询条件过长时可能会出错，可修改100为1000)

declare @strOrder varchar(400) -- 排序类型



if @OrderType != 0 

    begin 

    set @strTmp = '<(select min' 

    set @strOrder = ' order by  ' + @OrderfldName +'  desc' 

    end 

else 

begin 

    set @strTmp = '>(select max' 

    set @strOrder = ' order by  ' + @OrderfldName +'  asc' 

end

set @strSQL = 'select top ' + str(@PageSize) + ' ' + @fldName + ' from  ' 

+ @tblName2 + '  where  ' + @OrderfldName + ' ' + @strTmp + '( ' 

+ replace(@OrderfldName,@tblName1,'tblTmp') + ' ) from (select top ' + str((@PageIndex-1)*@PageSize) + '  ' 

+ @OrderfldName + '  from  ' + @tblName2 + ' ' + @strOrder + ') as tblTmp)' 

+ @strOrder

if @strWhere != '' 

set @strSQL = 'select top ' + str(@PageSize) + ' ' + @fldName + ' from  ' 

+ @tblName2 + '  where  ' + @OrderfldName + ' ' + @strTmp + '( ' 

+ replace(@OrderfldName,@tblName1,'tblTmp') + ' ) from (select top ' + str((@PageIndex-1)*@PageSize) + '  ' 

+ @OrderfldName + '  from  ' + @tblName2 + '  where ' + @strWhere + ' ' 

+ @strOrder + ') as tblTmp) ' + @strOrder

if @PageIndex = 1 

begin 

set @strTmp = '' 

    if @strWhere != '' 

    set @strTmp = ' where ' + @strWhere

    set @strSQL = 'select top ' + str(@PageSize) + ' ' + @fldName + ' from  ' 

    + @tblName2 + ' ' + @strTmp + ' ' + @strOrder 

end

if @IsReCount != 0 

    set @strSQL = @strSQL  +'/*----*/'+' select count(1) as Total from  ' + @tblName2 + ' '

if @IsPrint<>0

    print (@strSQL)

exec (@strSQL)



GO