数据库分页

王朝学院·作者佚名  2016-08-27
窄屏简体版  字體: |||超大  

声明:根据别人改编的

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--准备工作(创建数据库、表、插入二百万数据,建议采用本地数据库)

Create database data_Test

GO

use data_Test

GO

create table tb_TestTable --创建表

(

id int identity(1,1)PRimary key,

userName nvarchar(20) not null,

userPWD nvarchar(20) not null,

userEmail nvarchar(40) null ,

createtime datetime NOT NULL

)

GO

--插入数据:

--qlserver 批量插入记录时,对有标识列的字段要设置 set IDENTITY_INSERT 表名 on,

--然后再执行插入记录操作;插入完毕后恢复为 off 设置

--格式:

-- set IDENTITY_INSERT 表名 on

-- set IDENTITY_INSERT 表名 off

set identity_insert tb_TestTable on

declare @count int

SET @count=1

while @count<=2000000

begin

insert into tb_TestTable(id,userName,userPWD,userEmail,createtime) values(@count,'admin','admin888','lli0077@yahoo.com.cn',getdate())

set @count=@count+1

end

set identity_insert tb_TestTable off

---------------------------------------------分页存储过程------------------------------------------------------------

CREATE PROCEDURE [dbo].[sp_Paging]

(

@Tables nvarchar(1000), --表名/视图名

@PrimaryKey nvarchar(100), --主键

@Sort nvarchar(200) = NULL, --排序字段(不带order by)

@pageindex int = 1, --当前页码

@PageSize int = 10, --每页记录数

@Fields nvarchar(1000) = N'*', --输出字段

@Filter nvarchar(1000) = NULL, --where过滤条件(不带where)

@Group nvarchar(1000) = NULL, --Group语句(不带Group By)

@TotalCount int OUTPUT --总记录数

)

AS

DECLARE @SortTable nvarchar(100)

DECLARE @SortName nvarchar(100)

DECLARE @strSortColumn nvarchar(200)

DECLARE @Operator char(2)

DECLARE @type nvarchar(100)

DECLARE @prec int

--设定排序语句

IF @Sort IS NULL OR @Sort = ''

SET @Sort = @PrimaryKey

IF CHARINDEX('DESC',@Sort) >0

BEGIN

SET @strSortColumn = REPLACE(@Sort, 'DESC', '')

SET @operator = '>='

END

ELSE

BEGIN

SET @strSortColumn = REPLACE(@Sort, 'ASC', '')

SET @operator = '>='

END

IF CHARINDEX('.', @strSortColumn) > 0

BEGIN

SET @SortTable = SUBSTRING(@strSortColumn, 0, CHARINDEX('.',@strSortColumn))

SET @SortName = SUBSTRING(@strSortColumn, CHARINDEX('.',@strSortColumn) + 1, LEN(@strSortColumn))

END

ELSE

BEGIN

SET @SortTable = @Tables

SET @SortName = @strSortColumn

END

--设置排序字段类型和精度

SELECT @type=t.name, @prec=c.prec FROM sysobjects o

JOIN syscolumns c on o.id=c.id

JOIN systypes t on c.xusertype=t.xusertype WHERE o.name = @SortTable AND c.name = @SortName

IF CHARINDEX('char', @type) > 0

SET @type = @type + '(' + CAST(@prec AS varchar) + ')'

DECLARE @strPageSize nvarchar(50)

DECLARE @strStartRow nvarchar(50)

DECLARE @strFilter nvarchar(1000)

DECLARE @strSimpleFilter nvarchar(1000)

DECLARE @strGroup nvarchar(1000)

IF @pageindex <1

SET @pageindex = 1

SET @strPageSize = CAST(@PageSize AS nvarchar(50))

--设置开始分页记录数

SET @strStartRow = CAST(((@pageindex-1)*@PageSize +1) AS nvarchar(50))

--筛选以及分组语句

IF @Filter IS NOT NULL AND @Filter != ''

BEGIN

SET @strFilter = ' WHERE ' + @Filter + ' '

SET @strSimpleFilter = ' AND ' + @Filter + ' '

END

ELSE

BEGIN

SET @strSimpleFilter = ''

SET @strFilter = ''

END

IF @Group IS NOT NULL AND @Group != ''

SET @strGroup = ' GROUP BY '

--计算总记录数

DECLARE @TotalCountSql nvarchar(1000)

SET @TotalCountSql=N'SELECT @TotalCount=COUNT(*)' +N' FROM ' + @Tables + @strFilter

EXEC sp_executesql @TotalCountSql,N'@TotalCount int OUTPUT',@TotalCount OUTPUT

--执行查询语句

EXEC(

'DECLARE @SortColumn ' + @type +

' SET ROWCOUNT ' + @strStartRow +

'SELECT @SortColumn=' + @PrimaryKey + ' FROM ' + @Tables + @strFilter + ' ' + @strGroup + ' ORDER BY ' + @PrimaryKey +

' SET ROWCOUNT ' + @strPageSize +

' SELECT ' + @Fields + ' FROM ' + @Tables + ' WHERE ' + @PrimaryKey + @operator + ' @SortColumn ' + @strSimpleFilter + ' ' + @strGroup + ' ORDER BY ' + @PrimaryKey

)

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--实际执行代码:

DECLARE @sortcolumn nvarchar(100)

SET ROWCOUNT 151

SELECT @sortcolumn=id FROM dbo.tb_TestTable WHERE id>100 ORDER BY createtime

SET ROWCOUNT 15

PRINT @sortcolumn

SELECT * FROM dbo.tb_TestTable WHERE id>= @sortcolumn AND id>100 ORDER BY id

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--执行存储过程:

DECLARE @TotalCount int

--,@return_value int

EXEC [dbo].[sp_Paging]

@Tables = 'tb_TestTable',

@PrimaryKey = 'id',

@Sort = 'id ASC',

@pageindex = 11,

@PageSize = 15,

@Fields = '*',

@Filter = 'id>100',

@Group = NULL,

@TotalCount = @TotalCount OUTPUT

SELECT @TotalCount as N'@TotalCount'

--SELECT 'Return Value' = @return_value

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