分页的语句和存储过程
分页方案一：(利用Not In和SELECT TOP分页)
语句形式：
SELECT TOP 10 *
FROM TestTable
WHERE (ID NOT IN
(SELECT TOP 20 id
FROM TestTable
ORDER BY id))
ORDER BY ID
SELECT TOP 页大小 *
FROM TestTable
WHERE (ID NOT IN
(SELECT TOP (页大小*页数-1) id
FROM 表
ORDER BY id))
ORDER BY ID
分页方案二：(利用ID大于多少和SELECT TOP分页）
语句形式：
SELECT TOP 10 *
FROM TestTable
WHERE (ID >
(SELECT MAX(id)
FROM (SELECT TOP 20 id
FROM TestTable
ORDER BY id) AS T))
ORDER BY ID
SELECT TOP 页大小 *
FROM TestTable
WHERE (ID >
(SELECT MAX(id)
FROM (SELECT TOP 页大小*(页数-1) id
FROM 表
ORDER BY id) AS T))
ORDER BY ID
将其转化为存储过程
CREATE proc bypage
(
@pagesize int,
@pageindex int
)
as
declare @text as nvarchar(3000)
declare @pagenumber as int
set @pagenumber = @pageindex* @pagesize-@PageSize
set @text = 'select top ' + cast(@pageSize as nvarchar(30)) + ' * From TestTable Where ( ID Not In (Select Top ' + cast(@pagenumber as nvarchar(30)) + ' ID From TestTable Order By ID)) order by ID'
exec (@text)
GO
分页方案三：对其进行发展的通用性存储过程
CREATE Procedure prGetRecordByPage
(
@PageSize int, --每页的记录条数
@PageNumber int, --当前页面
@QuerySql varchar(1000),--部分查询字符串,如* From Test order by id desc
@KeyField varchar(500)
)
AS
Begin
Declare @SqlTable AS varchar(1000)
Declare @SqlText AS Varchar(1000)
Set @SqlTable='Select Top '+CAST(@PageNumber*@PageSize AS varchar(30))+' '+@QuerySql
Set @SqlText='Select Top '+Cast(@PageSize AS varchar(30))+' * From '
+'('+@SqlTable+') As TembTbA '
+'Where '+@KeyField+' Not In (Select Top '+CAST((@PageNumber-1)*@PageSize AS varchar(30))+' '+@KeyField+' From '
+'('+@SqlTable+') AS TempTbB)'
Exec(@SqlText)
End
GO
例如 exec prGetRecordByPage @Pagesize=10, @PageNumber=29, @QuerySql='* from TestTable order by ID', @KeyField='ID'
@SqlTable = Select Top 290 * From TestTable Order By ID
存储过程实际执行的语句是
Select Top 10 * From (Select Top 290 * From TestTable Order By ID) As TempTbA Where ID Not IN (Select Top 280 ID From (Select Top 290 * From TestTable Order By ID) As TempTbB)
注意： 在进行字符串连接时要注意空格，尤其是字符串加上由数字转化的字符串的时候要格外小心。
分页方案四：更强大的可以升降序的存储过程
CREATE PROCEDURE proc_page
@strTable varchar(50), --表名
@strColumn varchar(50), --按该列来进行分页
@intOrder bit, --排序,0-顺序,1-倒序
@strColumnlist varchar(800), --要查询出的字段列表,*表示全部字段
@intPageSize int, --每页记录数
@intPageNum int, --指定页
@strWhere varchar(800), --查询条件
@intPageCount int OUTPUT --总页数
AS
DECLARE @sql nvarchar(4000) --用于构造SQL语句
DECLARE @where1 varchar(800) --构造条件语句
DECLARE @where2 varchar(800) --构造条件语句
IF @strWhere is null or rtrim(@strWhere)=''
-- 为了避免SQL关键字与字段、表名等连在一起，首先为传入的变量添加空格
BEGIN --没有查询条件
SET @where1=' WHERE '
SET @where2=' '
END
ELSE
BEGIN --有查询条件
SET @where1=' WHERE ('+@strWhere+') AND '
SET @where2=' WHERE ('+@strWhere+') '
END
set @strColumn = ' ' + @strColumn + ' '
set @strColumnlist = ' ' + @strColumnlist + ' '
--构造SQL语句，计算总页数。计算公式为 总页数 = Ceiling ( 记录个数 / 页大小 )
SET @sql='SELECT @intPageCount=CEILING((COUNT(*)+0.0)/'
+ CAST(@intPageSize AS varchar)
+ ') FROM ' + @strTable + @where2
--执行SQL语句，计算总页数，并将其放入@intPageCount变量中
EXEC sp_executesql @sql,N'@intPageCount int OUTPUT',@intPageCount OUTPUT
print @intPageCount
IF @intOrder=0 --构造升序的SQL
SET @sql='SELECT TOP '+ CAST(@intPageSize AS varchar) +
@strColumnlist +
' FROM ' + @strTable + @where1 +
@strColumn + '>(SELECT MAX('+@strColumn+') '+
' FROM (SELECT TOP '+ CAST(@intPageSize*(@intPageNum - 1) AS varchar) +
@strColumn + ' FROM '+ @strTable+@where2+'ORDER BY '+@strColumn+') t) ORDER BY '+ @strColumn
ELSE --构造降序的SQL
SET @sql='SELECT TOP '+ CAST(@intPageSize AS varchar) +
@strColumnlist+
' FROM '+ @strTable + @where1 +
@strColumn + '<(SELECT MIN('+@strColumn+') '+
' FROM (SELECT TOP '+ CAST(@intPageSize*(@intPageNum - 1) AS varchar) +
@strColumn + ' FROM '+ @strTable+@where2+'ORDER BY '+@strColumn+' DESC) t) ORDER BY '+
@strColumn + ' DESC'
IF @intPageNum=1--第一页
SET @sql='SELECT TOP '+CAST(@intPageSize AS varchar) + @strColumnlist + ' FROM '+@strTable+
@where2+'ORDER BY '+@strColumn+CASE @intOrder WHEN 0 THEN '' ELSE ' DESC'
END
PRINT @sql
EXEC(@sql)
GO执行该存储过程的例子
declare @count int
exec proc_page @strTable='news', @strColumn='Title', @intOrder='1', @strColumnlist='*', @intPageSize=20, @intPageNum=3, @strWhere='TypeNo=2', @intPageCount=@count
