一个实例带你了解什么是数据库存储过程

发布日期：2016年12月01日文章来源：www.tengways.com

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一个网站到了后期都要面临一个问题，那就是数据过多在读取数据时浏览器的反应变得迟缓，这是就是数据库存储过程需要出马的时候了。编译后的网站执行速度会打打提升因为在数据库中保存的存储过程语句都是编译过的，允许模块化程序设计也就是类似方法的复用，提高系统安全性，减少网络流通量。这么多好处摆在面前还有不用的道理吗？

接下来就贴上自己的步骤和代码吧？

第一步在数据库中新建两个存储过程

1、

<!-set ANSI_NULLS ON

set QUOTED_IDENTIFIER ON

/*********************************************************

* 作用：数据分页(完整SQL分页存储过程（支持多表联接）)

* 使用说明：

1、单表调用方法：EXEC proc_DataPagination @tblName = 'ipa',@fldName = '*',@pageSize =50,@page = 6789,@fldSort = '',@Sort = 1,@strCondition = '',@ID = 'id',@Dist = 0,@pageCount = null,@Counts = NULL

2、多表调用方法：EXEC proc_DataPagination @tblName = 'Info LEFT JOIN InfoType it ON it.typeid=Info.tid',@fldName = 'info.*,it.tname',@pageSize =50,@page = 1806,@fldSort = '',@Sort = 0,@strCondition = '',@ID = 'id',@Dist = 0, @pageCount = null,@Counts = NULL

* 多表联合查询使用需注意：1、多表中的主键字段不能为相同的名称。2、多表中不能允许具有相同名称的字段，如果存在相同名称的字段你可以使用AS重命名

*********************************************************/

create PROCEDURE [dbo].[proc_DataPagination]

(

@TableName VARCHAR(200), --表名

@FieldList VARCHAR(2000), --显示列名，如果是全部字段则为*

@PrimaryKey VARCHAR(100), --单一主键或唯一值键

@Where VARCHAR(2000), --查询条件不含'where'字符，如id>10 and len(userid)>9

@Order VARCHAR(1000), --排序不含'order by'字符，如id asc,userid desc，必须指定asc或desc

--注意当@SortType=3时生效，记住一定要在最后加上主键，否则会让你比较郁闷

@SortType INT, --排序规则 1:正序asc 2:倒序desc 3:多列排序方法

@RecorderCount INT, --记录总数 0:会返回总记录

@PageSize INT, --每页输出的记录数

@PageIndex INT, --当前页数

@TotalCount INT OUTPUT, --记返回总记录

@TotalPageCount INT OUTPUT --返回总页数

)

SET NOCOUNT ON

IF ISNULL(@TotalCount,'') = '' SET @TotalCount = 0

SET @Order = RTRIM(LTRIM(@Order))

SET @PrimaryKey = RTRIM(LTRIM(@PrimaryKey))

SET @FieldList = REPLACE(RTRIM(LTRIM(@FieldList)),' ','')

WHILE CHARINDEX(', ',@Order) > 0 OR CHARINDEX(' ,',@Order) > 0

BEGIN

SET @Order = REPLACE(@Order,', ',',')

SET @Order = REPLACE(@Order,' ,',',')

END

IF ISNULL(@TableName,'') = '' OR ISNULL(@FieldList,'') = ''

OR ISNULL(@PrimaryKey,'') = ''

OR @SortType < 1 OR @SortType >3

OR @RecorderCount < 0 OR @PageSize < 0 OR @PageIndex < 0

BEGIN

PRINT('ERR_00')

RETURN

END

IF @SortType = 3

BEGIN

IF (UPPER(RIGHT(@Order,4))!=' ASC' AND UPPER(RIGHT(@Order,5))!=' DESC')

BEGIN PRINT('ERR_02') RETURN END

END

DECLARE @new_where1 VARCHAR(1000)

DECLARE @new_where2 VARCHAR(1000)

DECLARE @new_order1 VARCHAR(1000)

DECLARE @new_order2 VARCHAR(1000)

DECLARE @new_order3 VARCHAR(1000)

DECLARE @Sql VARCHAR(8000)

DECLARE @SqlCount NVARCHAR(4000)

IF ISNULL(@where,'') = ''

BEGIN

SET @new_where1 = ' '

SET @new_where2 = ' WHERE '

END

ELSE

BEGIN

SET @new_where1 = ' WHERE ' + @where

SET @new_where2 = ' WHERE ' + @where + ' AND '

END

IF ISNULL(@order,'') = '' OR @SortType = 1 OR @SortType = 2

BEGIN

IF @SortType = 1

BEGIN

SET @new_order1 = ' ORDER BY ' + @PrimaryKey + ' ASC'

SET @new_order2 = ' ORDER BY ' + @PrimaryKey + ' DESC'

END

IF @SortType = 2

BEGIN

SET @new_order1 = ' ORDER BY ' + @PrimaryKey + ' DESC'

SET @new_order2 = ' ORDER BY ' + @PrimaryKey + ' ASC'

END

ELSE

BEGIN

SET @new_order1 = ' ORDER BY ' + @Order

END

IF @SortType = 3 AND CHARINDEX(','+@PrimaryKey+' ',','+@Order)>0

BEGIN

SET @new_order1 = ' ORDER BY ' + @Order

SET @new_order2 = @Order + ','

SET @new_order2 = REPLACE(REPLACE(@new_order2,'ASC,','{ASC},'),'DESC,','{DESC},')

SET @new_order2 = REPLACE(REPLACE(@new_order2,'{ASC},','DESC,'),'{DESC},','ASC,')

SET @new_order2 = ' ORDER BY ' + SUBSTRING(@new_order2,1,LEN(@new_order2)-1)

IF @FieldList <> '*'

BEGIN

SET @new_order3 = REPLACE(REPLACE(@Order + ',','ASC,',','),'DESC,',',')

SET @FieldList = ',' + @FieldList

WHILE CHARINDEX(',',@new_order3)>0

BEGIN

IF CHARINDEX(SUBSTRING(','+@new_order3,1,CHARINDEX(',',@new_order3)),','+@FieldList+',')>0

BEGIN

SET @FieldList =

@FieldList + ',' + SUBSTRING(@new_order3,1,CHARINDEX(',',@new_order3))

END

SET @new_order3 =

SUBSTRING(@new_order3,CHARINDEX(',',@new_order3)+1,LEN(@new_order3))

END

SET @FieldList = SUBSTRING(@FieldList,2,LEN(@FieldList))

END

SET @SqlCount = 'SELECT @TotalCount=COUNT(*),@TotalPageCount=CEILING((COUNT(*)+0.0)/'

+ CAST(@PageSize AS VARCHAR)+') FROM ' + @TableName + @new_where1

IF @RecorderCount = 0

BEGIN

EXEC SP_EXECUTESQL @SqlCount,N'@TotalCount INT OUTPUT,@TotalPageCount INT OUTPUT',

@TotalCount OUTPUT,@TotalPageCount OUTPUT

END

ELSE

BEGIN

SELECT @TotalCount = @RecorderCount

END

IF @PageIndex > CEILING((@TotalCount+0.0)/@PageSize)

BEGIN

SET @PageIndex = CEILING((@TotalCount+0.0)/@PageSize)

END

IF @PageIndex = 1 OR @PageIndex >= CEILING((@TotalCount+0.0)/@PageSize)

BEGIN

IF @PageIndex = 1 --返回第一页数据

BEGIN

SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM '

+ @TableName + @new_where1 + @new_order1

END

IF @PageIndex >= CEILING((@TotalCount+0.0)/@PageSize) --返回最后一页数据

BEGIN

SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ('

+ 'SELECT TOP ' + STR(ABS(@PageSize*@PageIndex-@TotalCount-@PageSize))

+ ' ' + @FieldList + ' FROM '

+ @TableName + @new_where1 + @new_order2 + ' ) AS TMP '

+ @new_order1

END

ELSE

BEGIN

IF @SortType = 1 --仅主键正序排序

BEGIN

IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2 --正向检索

BEGIN

SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM '

+ @TableName + @new_where2 + @PrimaryKey + ' > '

+ '(SELECT MAX(' + @PrimaryKey + ') FROM (SELECT TOP '

+ STR(@PageSize*(@PageIndex-1)) + ' ' + @PrimaryKey

+ ' FROM ' + @TableName

+ @new_where1 + @new_order1 +' ) AS TMP) '+ @new_order1

END

ELSE --反向检索

BEGIN

SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ('

+ 'SELECT TOP ' + STR(@PageSize) + ' '

+ @FieldList + ' FROM '

+ @TableName + @new_where2 + @PrimaryKey + ' < '

+ '(SELECT MIN(' + @PrimaryKey + ') FROM (SELECT TOP '

+ STR(@TotalCount-@PageSize*@PageIndex) + ' ' + @PrimaryKey

+ ' FROM ' + @TableName

+ @new_where1 + @new_order2 +' ) AS TMP) '+ @new_order2

+ ' ) AS TMP ' + @new_order1

END

IF @SortType = 2 --仅主键反序排序

BEGIN

IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2 --正向检索

BEGIN

SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM '

+ @TableName + @new_where2 + @PrimaryKey + ' < '

+ '(SELECT MIN(' + @PrimaryKey + ') FROM (SELECT TOP '

+ STR(@PageSize*(@PageIndex-1)) + ' ' + @PrimaryKey

+' FROM '+ @TableName

+ @new_where1 + @new_order1 + ') AS TMP) '+ @new_order1

END

ELSE --反向检索

BEGIN

SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ('

+ 'SELECT TOP ' + STR(@PageSize) + ' '

+ @FieldList + ' FROM '

+ @TableName + @new_where2 + @PrimaryKey + ' > '

+ '(SELECT MAX(' + @PrimaryKey + ') FROM (SELECT TOP '

+ STR(@TotalCount-@PageSize*@PageIndex) + ' ' + @PrimaryKey

+ ' FROM ' + @TableName

+ @new_where1 + @new_order2 +' ) AS TMP) '+ @new_order2

+ ' ) AS TMP ' + @new_order1

END

IF @SortType = 3 --多列排序，必须包含主键，且放置最后，否则不处理

BEGIN

IF CHARINDEX(',' + @PrimaryKey + ' ',',' + @Order) = 0

BEGIN PRINT('ERR_02') RETURN END

IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2 --正向检索

BEGIN

SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '

+ 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '

+ ' SELECT TOP ' + STR(@PageSize*@PageIndex) + ' ' + @FieldList

+ ' FROM ' + @TableName + @new_where1 + @new_order1 + ' ) AS TMP '

+ @new_order2 + ' ) AS TMP ' + @new_order1

END

ELSE --反向检索

BEGIN

SET @Sql = 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '

+ 'SELECT TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '

+ ' SELECT TOP ' + STR(@TotalCount-@PageSize*@PageIndex+@PageSize) + ' ' + @FieldList

+ ' FROM ' + @TableName + @new_where1 + @new_order2 + ' ) AS TMP '

+ @new_order1 + ' ) AS TMP ' + @new_order1

END

PRINT(@Sql)

EXEC(@Sql)->

2、

<!-set ANSI_NULLS ON

set QUOTED_IDENTIFIER ON

ALTER PROCEDURE [dbo].[getPagerTopMAX] (

@tblNamenvarchar(2000), ----要显示的表或多个表的连接,如："myTable"

@IDnvarchar(150), ----主表的主键，如："id"

@pageint = 1, ----要显示那一页的记录

@pageSizeint = 10, ----每页显示的记录个数

@fldNamenvarchar(500) = '*', ----要显示的字段列表,如："id, cdsinger, cdsingertype, area, cdsingerreadme"

@fldSortnvarchar(200) = @ID, ----排序字段列表或条件

@Sortint = 1, ----排序方法，0为升序，1为降序(如果是多字段排列Sort指代最后一个排序字段的排列顺序(最后一个排序字段不加排序标记)--程序传参如：' SortA Asc,SortB Desc,SortC ')

@strConditionnvarchar(1000) = null, ----查询条件,不需where,如："and a=1 and b=2"

@Dist int = 0, ----是否添加查询字段的 DISTINCT 默认0不添加/1添加

@Countsint = 1 output, ----查询到的记录数

@pageCountint = 1 output ----查询结果分页后的总页数

)

AS begin

SET NOCOUNT ON

Declare @sqlTmp nvarchar(3000) ----存放动态生成的SQL语句

Declare @strTmp nvarchar(3000) ----存放取得查询结果总数的查询语句

Declare @strID nvarchar(3000) ----存放取得查询开头或结尾ID的查询语句

Declare @strSortType nvarchar(10) ----数据排序规则A

Declare @strFSortType nvarchar(10) ----数据排序规则B

Declare @SqlSelect nvarchar(50) ----对含有DISTINCT的查询进行SQL构造

Declare @SqlCounts nvarchar(50) ----对含有DISTINCT的总数查询进行SQL构造

if @Dist = 0

begin

set @SqlSelect = 'select '

set @SqlCounts = 'Count(*)'

end

else

begin

set @SqlSelect = 'select distinct '

set @SqlCounts = 'Count(DISTINCT '+@ID+')'

end

if @Sort=0

begin

set @strFSortType=' ASC '

set @strSortType=' DESC '

end

else

begin

set @strFSortType=' DESC '

set @strSortType=' ASC '

end

--------生成查询语句--------

--此处@strTmp为取得查询结果数量的语句

if @strCondition is null or @strCondition='' --没有设置显示条件

begin

set @sqlTmp = @fldName + ' From ' + @tblName

set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName

set @strID = ' From ' + @tblName

end

else

begin

set @sqlTmp = + @fldName + 'From ' + @tblName + ' where (1>0) ' + @strCondition

set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName + ' where (1>0) ' + @strCondition

set @strID = ' From ' + @tblName + ' where (1>0) ' + @strCondition

end

----取得查询结果总数量-----

exec sp_executesql @strTmp,N'@Counts int out ',@Counts out

declare @tmpCounts int

if @Counts = 0

set @tmpCounts = 1

else

set @tmpCounts = @Counts

--取得分页总数

set @pageCount=(@tmpCounts+@pageSize-1)/@pageSize

/**//**当前页大于总页数取最后一页**/

if @page>@pageCount

set @page=@pageCount

--/*-----数据分页2分处理-------*/

declare @pageIndex int --总数/页大小

declare @lastcount int --总数%页大小

set @pageIndex = @tmpCounts/@pageSize

set @lastcount = @tmpCounts%@pageSize

if @lastcount > 0

set @pageIndex = @pageIndex + 1

else

set @lastcount = @pagesize

--//***显示分页

if @strCondition is null or @strCondition='' --没有设置显示条件

begin

if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2 --前半部分数据处理

begin

if @page=1

set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName

+' order by '+ @fldSort +' '+ @strFSortType

else

begin

set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName

+' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'

+' order by '+ @fldSort +' '+ @strFSortType

end

else

begin

set @page = @pageIndex-@page+1 --后半部分数据处理

if @page <= 1 --最后一页数据显示

set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(20))+' '+ @fldName+' from '+@tblName

+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType

else

set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName

+' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'

+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType

end

else --有查询条件

begin

if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2 --前半部分数据处理

begin

if @page=1

set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName

+' where 1=1 ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType

else

begin

set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName

+' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'

+' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType

end

else

begin

set @page = @pageIndex-@page+1 --后半部分数据处理

if @page <= 1 --最后一页数据显示

set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(20))+' '+ @fldName+' from '+@tblName

+' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType

else

set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName

+' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName

+' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'

+' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType

end

------返回查询结果-----

--print @strTmp

exec (@strTmp)

SET NOCOUNT OFF

end

做的这步差不多已经结束了，接下来就是贴出自己需要的代码.

<!-

DataSet ds;

int iPageCount = 0, iCounts = 0, iPageIndex = 0;

iPageIndex = Grid1.PageIndex == 0 ? 1 : Grid1.PageIndex + 1;

sql = "and (Mark<>'2' and Mark<>'1')";

if (!string.IsNullOrEmpty(txtsearch1.Text.Trim()) || !string.IsNullOrEmpty(txtsearch2.Text.Trim()))

{

sql += " and ( REQ between '" + txtsearch1.Text.Trim() + "' and '" + txtsearch2.Text.Trim() + "')";

}

if (!string.IsNullOrEmpty(TextBox1.Text.Trim()))

{

sql += "and Contact like'%" + TextBox1.Text.Trim() + "%' ";

}

if (!string.IsNullOrEmpty(TextBox2.Text.Trim()))

{

sql += "and Tel like'%" + TextBox2.Text.Trim() + "%'";

}

if (ddlUpID2.SelectedValue == "3")

{

}

else

{

switch (ddlUpID2.SelectedValue)

{

case "0":

sql += " and (biaoji ='0' or biaoji is null) ";

break;

case "1":

sql += " and biaoji = '1' ";

break;

}

ds = PubConstant.SelectByPage("GuestBook", "*", "FaqID", sql, " AddTime desc,FaqID desc", 3, Grid1.PageSize, Grid1.PageIndex + 1, out iCounts, out iPageCount);

// 输出分页合计结果

Grid1.DataSource = ds;

Grid1.DataBind();

Grid1.RecordCount = iCounts;

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一个实例带你了解什么是数据库存储过程