利用表变量实现分页
一、
- 代码
- CREATE PROCEDURE [dbo].[GetRecordFromPage]
- @SelectList VARCHAR(2000), --欲选择字段列表
- @TableSource VARCHAR(100), --表名或视图表
- @SearchCondition VARCHAR(2000), --查询条件
- @OrderExpression VARCHAR(1000), --排序表达式
- @PageIndex INT = 1, --页号,从0开始
- @PageSize INT = 10 --页尺寸
- AS
- BEGIN
- IF @SelectList IS NULL OR LTRIM(RTRIM(@SelectList)) = ''
- BEGIN
- SET @SelectList = '*'
- END
- PRINT @SelectList
- SET @SearchCondition = ISNULL(@SearchCondition,'')
- SET @SearchCondition = LTRIM(RTRIM(@SearchCondition))
- IF @SearchCondition <> ''
- BEGIN
- IF UPPER(SUBSTRING(@SearchCondition,1,5)) <> 'WHERE'
- BEGIN
- SET @SearchCondition = 'WHERE ' + @SearchCondition
- END
- END
- PRINT @SearchCondition
- SET @OrderExpression = ISNULL(@OrderExpression,'')
- SET @OrderExpression = LTRIM(RTRIM(@OrderExpression))
- IF @OrderExpression <> ''
- BEGIN
- IF UPPER(SUBSTRING(@OrderExpression,1,5)) <> 'WHERE'
- BEGIN
- SET @OrderExpression = 'ORDER BY ' + @OrderExpression
- END
- END
- PRINT @OrderExpression
- IF @PageIndex IS NULL OR @PageIndex < 1
- BEGIN
- SET @PageIndex = 1
- END
- PRINT @PageIndex
- IF @PageSize IS NULL OR @PageSize < 1
- BEGIN
- SET @PageSize = 10
- END
- PRINT @PageSize
- DECLARE @SqlQuery VARCHAR(4000)
- SET @SqlQuery='SELECT '+@SelectList+',RowNumber
- FROM
- (SELECT ' + @SelectList + ',ROW_NUMBER() OVER( '+ @OrderExpression +') AS RowNumber
- FROM '+@TableSource+' '+ @SearchCondition +') AS RowNumberTableSource
- WHERE RowNumber BETWEEN ' + CAST(((@PageIndex - 1)* @PageSize+1) AS VARCHAR)
- + ' AND ' +
- CAST((@PageIndex * @PageSize) AS VARCHAR)
- PRINT @SqlQuery
- SET NOCOUNT ON
- EXECUTE(@SqlQuery)
- SET NOCOUNT OFF
- RETURN @@RowCount
- END
二
- 代码
- CREATE PROCEDURE [dbo].[GetRecordFromPage]
- @SelectList VARCHAR(2000), --欲选择字段列表
- @TableSource VARCHAR(100), --表名或视图表
- @SearchCondition VARCHAR(2000), --查询条件
- @OrderExpression VARCHAR(1000), --排序表达式
- @PageIndex INT = 1, --页号,从0开始
- @PageSize INT = 10 --页尺寸
- AS
- BEGIN
- IF @SelectList IS NULL OR LTRIM(RTRIM(@SelectList)) = ''
- BEGIN
- SET @SelectList = '*'
- END
- PRINT @SelectList
- SET @SearchCondition = ISNULL(@SearchCondition,'')
- SET @SearchCondition = LTRIM(RTRIM(@SearchCondition))
- IF @SearchCondition <> ''
- BEGIN
- IF UPPER(SUBSTRING(@SearchCondition,1,5)) <> 'WHERE'
- BEGIN
- SET @SearchCondition = 'WHERE ' + @SearchCondition
- END
- END
- PRINT @SearchCondition
- SET @OrderExpression = ISNULL(@OrderExpression,'')
- SET @OrderExpression = LTRIM(RTRIM(@OrderExpression))
- IF @OrderExpression <> ''
- BEGIN
- IF UPPER(SUBSTRING(@OrderExpression,1,5)) <> 'WHERE'
- BEGIN
- SET @OrderExpression = 'ORDER BY ' + @OrderExpression
- END
- END
- PRINT @OrderExpression
- IF @PageIndex IS NULL OR @PageIndex < 1
- BEGIN
- SET @PageIndex = 1
- END
- PRINT @PageIndex
- IF @PageSize IS NULL OR @PageSize < 1
- BEGIN
- SET @PageSize = 10
- END
- PRINT @PageSize
- DECLARE @SqlQuery VARCHAR(4000)
- SET @SqlQuery='SELECT '+@SelectList+',RowNumber
- FROM
- (SELECT ' + @SelectList + ',ROW_NUMBER() OVER( '+ @OrderExpression +') AS RowNumber
- FROM '+@TableSource+' '+ @SearchCondition +') AS RowNumberTableSource
- WHERE RowNumber BETWEEN ' + CAST(((@PageIndex - 1)* @PageSize+1) AS VARCHAR)
- + ' AND ' +
- CAST((@PageIndex * @PageSize) AS VARCHAR)
- PRINT @SqlQuery
- SET NOCOUNT ON
- EXECUTE(@SqlQuery)
- SET NOCOUNT OFF
- RETURN @@RowCount
- END
三、
从数据表中取出第n条到第m条的记录的方法
从publish 表中取出第 n 条到第 m 条的记录:
SELECT TOP m-n+1 *
FROM publish
WHERE (id NOT IN
(SELECT TOP n-1 id
FROM publish))
id 为publish 表的关键字
------------------------
分页方案:
select top 页大小 *
from table1
where id>
(select max (id) from
(select top ((页码-1)*页大小) id from table1 order by id) as T
)
order by id
全部的sql语句:
- 代码
- --获取指定页的数据:
- CREATE PROCEDURE pagination3
- @tblName varchar(255), -- 表名
- @strGetFields varchar(1000) = ''*'', -- 需要返回的列
- @fldName varchar(255)='''', -- 排序的字段名
- @PageSize int = 10, -- 页尺寸
- @PageIndex int = 1, -- 页码
- @doCount 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(1500) = '''' -- 查询条件 (注意: 不要加 where)
- AS
- declare @strSQL varchar(5000) -- 主语句
- declare @strTmp varchar(110) -- 临时变量
- declare @strOrder varchar(400) -- 排序类型
- if @doCount != 0
- begin
- if @strWhere !=''''
- set @strSQL = "select count(*) as Total from [" + @tblName + "] where "+@strWhere
- else
- set @strSQL = "select count(*) as Total from [" + @tblName + "]"
- end
- --以上代码的意思是如果@doCount传递过来的不是0,就执行总数统计。以下的所有代码都是@doCount为0的情况:
- else
- begin
- if @OrderType != 0
- begin
- set @strTmp = "<(select min"
- set @strOrder = " order by [" + @fldName +"] desc"
- --如果@OrderType不是0,就执行降序,这句很重要!
- end
- else
- begin
- set @strTmp = ">(select max"
- set @strOrder = " order by [" + @fldName +"] asc"
- end
- if @PageIndex = 1
- begin
- if @strWhere != ''''
- set @strSQL = "select top " + str(@PageSize) +" "+@strGetFields+ "
- from [" + @tblName + "] where " + @strWhere + " " + @strOrder
- else
- set @strSQL = "select top " + str(@PageSize) +" "+@strGetFields+ "
- from ["+ @tblName + "] "+ @strOrder
- --如果是第一页就执行以上代码,这样会加快执行速度
- end
- else
- begin
- --以下代码赋予了@strSQL以真正执行的SQL代码
- set @strSQL = "select top " + str(@PageSize) +" "+@strGetFields+ " 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) +" "+@strGetFields+ " from ["
- + @tblName + "] where [" + @fldName + "]" + @strTmp + "(["
- + @fldName + "]) from (select top " + str((@PageIndex-1)*@PageSize) + " ["
- + @fldName + "] from [" + @tblName + "] where " + @strWhere + " "
- + @strOrder + ") as tblTmp) and " + @strWhere + " " + @strOrder
- end
- end
- exec (@strSQL)
- GO
本文转自linzheng 51CTO博客,原文链接:http://blog.51cto.com/linzheng/1081579