整理：分页存储过程整理

CREATE PROC sp_PageView
@tbname     sysname,               --要分页显示的表名
@FieldKey   nvarchar(1000),      --用于定位记录的主键(惟一键)字段,可以是逗号分隔的多个字段
@PageCurrent int=1,               --要显示的页码
@PageSize   int=10,                --每页的大小(记录数)
@FieldShow nvarchar(1000)='',      --以逗号分隔的要显示的字段列表,如果不指定,则显示所有字段
@FieldOrder nvarchar(1000)='',      --以逗号分隔的排序字段列表,可以指定在字段后面指定DESC/ASC
                                          用于指定排序顺序
@Where    nvarchar(1000)='',     --查询条件
@PageCount int OUTPUT             --总页数
AS
SET NOCOUNT ON
--检查对象是否有效
IF OBJECT_ID(@tbname) IS NULL
BEGIN
    RAISERROR(N'对象"%s"不存在',1,16,@tbname)
    RETURN
END
IF OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsTable')=0
    AND OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsView')=0
    AND OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsTableFunction')=0
BEGIN
    RAISERROR(N'"%s"不是表、视图或者表值函数',1,16,@tbname)
    RETURN
END

--分页字段检查
IF ISNULL(@FieldKey,N'')=''
BEGIN
    RAISERROR(N'分页处理需要主键（或者惟一键）',1,16)
    RETURN
END

--其他参数检查及规范
IF ISNULL(@PageCurrent,0)<1 SET @PageCurrent=1
IF ISNULL(@PageSize,0)<1 SET @PageSize=10
IF ISNULL(@FieldShow,N'')=N'' SET @FieldShow=N'*'
IF ISNULL(@FieldOrder,N'')=N''
    SET @FieldOrder=N''
ELSE
    SET @FieldOrder=N'ORDER BY '+LTRIM(@FieldOrder)
IF ISNULL(@Where,N'')=N''
    SET @Where=N''
ELSE
    SET @Where=N'WHERE ('+@Where+N')'

--如果@PageCount为NULL值,则计算总页数(这样设计可以只在第一次计算总页数,以后调用时,把总页数传回给存储过程,避免再次计算总页数,对于不想计算总页数的处理而言,可以给@PageCount赋值)
IF @PageCount IS NULL
BEGIN
    DECLARE @sql nvarchar(4000)
    SET @sql=N'SELECT @PageCount=COUNT(*)'
        +N' FROM '+@tbname
        +N' '+@Where
    EXEC sp_executesql @sql,N'@PageCount int OUTPUT',@PageCount OUTPUT
    SET @PageCount=(@PageCount+@PageSize-1)/@PageSize
END

--计算分页显示的TOPN值
DECLARE @TopN varchar(20),@TopN1 varchar(20)
SELECT @TopN=@PageSize,
    @TopN1=(@PageCurrent-1)*@PageSize

--第一页直接显示
IF @PageCurrent=1
    EXEC(N'SELECT TOP '+@TopN
        +N' '+@FieldShow
        +N' FROM '+@tbname
        +N' '+@Where
        +N' '+@FieldOrder)
ELSE
BEGIN
    --处理别名
    IF @FieldShow=N'*'
        SET @FieldShow=N'a.*'

    --生成主键(惟一键)处理条件
    DECLARE @Where1 nvarchar(4000),@Where2 nvarchar(4000),
        @s nvarchar(1000),@Field sysname
    SELECT @Where1=N'',@Where2=N'',@s=@FieldKey
    WHILE CHARINDEX(N',',@s)>0
        SELECT @Field=LEFT(@s,CHARINDEX(N',',@s)-1),
            @s=STUFF(@s,1,CHARINDEX(N',',@s),N''),
            @Where1=@Where1+N' AND a.'+@Field+N'=b.'+@Field,
            @Where2=@Where2+N' AND b.'+@Field+N' IS NULL',
            @Where=REPLACE(@Where,@Field,N'a.'+@Field),
            @FieldOrder=REPLACE(@FieldOrder,@Field,N'a.'+@Field),
            @FieldShow=REPLACE(@FieldShow,@Field,N'a.'+@Field)
    SELECT @Where=REPLACE(@Where,@s,N'a.'+@s),
        @FieldOrder=REPLACE(@FieldOrder,@s,N'a.'+@s),
        @FieldShow=REPLACE(@FieldShow,@s,N'a.'+@s),
        @Where1=STUFF(@Where1+N' AND a.'+@s+N'=b.'+@s,1,5,N''),
        @Where2=CASE
            WHEN @Where='' THEN N'WHERE ('
            ELSE @Where+N' AND ('
            END+N'b.'+@s+N' IS NULL'+@Where2+N')'
    --执行查询
    EXEC(N'SELECT TOP '+@TopN
        +N' '+@FieldShow
        +N' FROM '+@tbname
        +N' a LEFT JOIN(SELECT TOP '+@TopN1
        +N' '+@FieldKey
        +N' FROM '+@tbname
        +N' a '+@Where
        +N' '+@FieldOrder
        +N')b ON '+@Where1
        +N' '+@Where2
        +N' '+@FieldOrder)
END

CREATE PROC sp_PageView
@tbname     sysname,               --要分页显示的表名
@FieldKey   sysname,               --用于定位记录的主键(惟一键)字段,只能是单个字段
@PageCurrent int=1,                 --要显示的页码
@PageSize   int=10,                --每页的大小(记录数)
@FieldShow  nvarchar(1000)='',      --以逗号分隔的要显示的字段列表,如果不指定,则显示所有字段
@FieldOrder  nvarchar(1000)='',     --以逗号分隔的排序字段列表,可以指定在字段后面指定DESC/ASC
                                          用于指定排序顺序
@Where     nvarchar(1000)='',      --查询条件
@PageCount  int OUTPUT            --总页数
AS
DECLARE @sql nvarchar(4000)
SET NOCOUNT ON
--检查对象是否有效
IF OBJECT_ID(@tbname) IS NULL
BEGIN
    RAISERROR(N'对象"%s"不存在',1,16,@tbname)
    RETURN
END
IF OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsTable')=0
    AND OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsView')=0
    AND OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsTableFunction')=0
BEGIN
    RAISERROR(N'"%s"不是表、视图或者表值函数',1,16,@tbname)
    RETURN
END

--分页字段检查
IF ISNULL(@FieldKey,N'')=''
BEGIN
    RAISERROR(N'分页处理需要主键（或者惟一键）',1,16)
    RETURN
END

--其他参数检查及规范
IF ISNULL(@PageCurrent,0)<1 SET @PageCurrent=1
IF ISNULL(@PageSize,0)<1 SET @PageSize=10
IF ISNULL(@FieldShow,N'')=N'' SET @FieldShow=N'*'
IF ISNULL(@FieldOrder,N'')=N''
    SET @FieldOrder=N''
ELSE
    SET @FieldOrder=N'ORDER BY '+LTRIM(@FieldOrder)
IF ISNULL(@Where,N'')=N''
    SET @Where=N''
ELSE
    SET @Where=N'WHERE ('+@Where+N')'

--如果@PageCount为NULL值,则计算总页数(这样设计可以只在第一次计算总页数,以后调用时,把总页数传回给存储过程,避免再次计算总页数,对于不想计算总页数的处理而言,可以给@PageCount赋值)
IF @PageCount IS NULL
BEGIN
    SET @sql=N'SELECT @PageCount=COUNT(*)'
        +N' FROM '+@tbname
        +N' '+@Where
    EXEC sp_executesql @sql,N'@PageCount int OUTPUT',@PageCount OUTPUT
    SET @PageCount=(@PageCount+@PageSize-1)/@PageSize
END

--计算分页显示的TOPN值
DECLARE @TopN varchar(20),@TopN1 varchar(20)
SELECT @TopN=@PageSize,
    @TopN1=@PageCurrent*@PageSize

--第一页直接显示
IF @PageCurrent=1
    EXEC(N'SELECT TOP '+@TopN
        +N' '+@FieldShow
        +N' FROM '+@tbname
        +N' '+@Where
        +N' '+@FieldOrder)
ELSE
BEGIN
    SELECT @PageCurrent=@TopN1,
        @sql=N'SELECT @n=@n-1,@s=CASE WHEN @n<'+@TopN
            +N' THEN @s+N'',''+QUOTENAME(RTRIM(CAST('+@FieldKey
            +N' as varchar(8000))),N'''''''') ELSE N'''' END FROM '+@tbname
            +N' '+@Where
            +N' '+@FieldOrder
    SET ROWCOUNT @PageCurrent
    EXEC sp_executesql @sql,
        N'@n int,@s nvarchar(4000) OUTPUT',
        @PageCurrent,@sql OUTPUT
    SET ROWCOUNT 0
    IF @sql=N''
        EXEC(N'SELECT TOP 0'
            +N' '+@FieldShow
            +N' FROM '+@tbname)
    ELSE
    BEGIN
        SET @sql=STUFF(@sql,1,1,N'')
        --执行查询
        EXEC(N'SELECT TOP '+@TopN
            +N' '+@FieldShow
            +N' FROM '+@tbname
            +N' WHERE '+@FieldKey
            +N' IN('+@sql
            +N') '+@FieldOrder)
    END
END

CREATE PROC sp_PageView
@sql         ntext,     --要执行的sql语句
@PageCurrent int=1,     --要显示的页码
@PageSize    int=10,    --每页的大小
@PageCount   int OUTPUT --总页数
AS
SET NOCOUNT ON
DECLARE @p1 int
--初始化分页游标
EXEC sp_cursoropen
    @cursor=@p1 OUTPUT,
    @stmt=@sql,
    @scrollopt=1,
    @ccopt=1,
    @rowcount=@PageCount OUTPUT

--计算总页数
IF ISNULL(@PageSize,0)<1
    SET @PageSize=10
SET @PageCount=(@PageCount+@PageSize-1)/@PageSize
IF ISNULL(@PageCurrent,0)<1 OR ISNULL(@PageCurrent,0)>@PageCount
    SET @PageCurrent=1
ELSE
    SET @PageCurrent=(@PageCurrent-1)*@PageSize+1

--显示指定页的数据
EXEC sp_cursorfetch @p1,16,@PageCurrent,@PageSize

--关闭分页游标
EXEC sp_cursorclose @p1

DECLARE @pagenum AS INT, @pagesize AS INT
SET @pagenum = 2
SET @pagesize = 3
SELECT *
FROM (SELECT ROW_NUMBER() OVER(ORDER BY newsid DESC) AS rownum,
newsid, topic, ntime, hits
FROM news) AS D
WHERE rownum BETWEEN (@pagenum-1)*@pagesize+1 AND @pagenum*@pagesize
ORDER BY newsid DESC

create proc Proc_paged
(
    @pagesize int,
    @pagenum int,
    @pagecount int output
)
as
begin
--声明变量
declare @tmptable table(id int identity (1,1),userid nchar(5))
declare @idBengin int
declare @idend int
--构造内存表
insert into @tmptable (userid )(select userid from users)
select @pagecount=count(*) from @tmptable
if(@pagecount%@pagesize>0)
set @pagecount=@pagecount/@pagesize+1
else
set @pagecount=@pagecount/@pagesize
set @idBengin=(@pagenum-1)*@pagesize
set @idend=@idBengin+@pagesize
select t2.id,t1.* from users t1,@tmptable t2 where t1.userid=t2.userid and
     t2.id>@idBengin and t2.id<=@idend
end

-- =============================================
-- Author:  黄剑平
-- Create date: 2007-5-11
-- Description: SQL 2005 版本通用分页存储过程
-- BLOG:  http://www.fnsword.com
-- =============================================
Create PROCEDURE [dbo].[Pagination]
@Page int = 1,      -- 当前页码
@PageSize int = 10,     -- 每页记录条数(页面大小)
@Table nvarchar(500),    -- 表名或视图名，甚至可以是嵌套SQL：(Select * From Tab Where ID>1000) Tab
@Field nvarchar(200) = '*',   -- 返回记录集字段名，","隔开，默认是"*"
@OrderBy nvarchar(100) = 'ID ASC', -- 排序规则
@Filter nvarchar(500),    -- 过滤条件
@MaxPage smallint output,   -- 执行结果 -1 error, 0 false, maxpage true
@TotalRow int output,    -- 记录总数 /* 2007-07-12 22:11:00 update */
@Descript varchar(100) output  -- 结果描述
AS
BEGIN
Set ROWCOUNT @PageSize;

Set @Descript = 'successful';
-------------------参数检测----------------
IF LEN(RTRIM(LTRIM(@Table))) !> 0
Begin
  Set @MaxPage = 0;
  Set @Descript = 'table name is empty';
  Return;
End

IF LEN(RTRIM(LTRIM(@OrderBy))) !> 0
Begin
  Set @MaxPage = 0;
  Set @Descript = 'order is empty';
  Return;
End

IF ISNULL(@PageSize,0) <= 0
Begin
  Set @MaxPage = 0;
  Set @Descript = 'page size error';
  Return;
End

IF ISNULL(@Page,0) <= 0
Begin
  Set @MaxPage = 0;
  Set @Descript = 'page error';
  Return;
End
-------------------检测结束----------------

Begin Try
  -- 整合SQL
  Declare @SQL nvarchar(4000), @Portion nvarchar(4000);

  Set @Portion = ' ROW_NUMBER() OVER (ORDER BY ' + @OrderBy + ') AS ROWNUM FROM ' + @Table;

  Set @Portion = @Portion + (CASE WHEN LEN(@Filter) >= 1 THEN (' Where ' + @Filter + ') AS tab') ELSE (') AS tab') END);

  Set @SQL = 'Select TOP(' + CAST(@PageSize AS nvarchar(8)) + ') ' + @Field + ' FROM (Select ' + @Field + ',' + @Portion;

  Set @SQL = @SQL + ' Where tab.ROWNUM > ' + CAST((@Page-1)*@PageSize AS nvarchar(8));

  -- 执行SQL, 取当前页记录集
  Execute(@SQL);
  --------------------------------------------------------------------

  -- 整合SQL
  Set @SQL = 'Set @Rows = (Select MAX(ROWNUM) FROM (Select' + @Portion + ')';

  -- 执行SQL, 取最大页码
  Execute sp_executesql @SQL, N'@Rows int output', @TotalRow output;
  Set @MaxPage = (CASE WHEN (@TotalRow % @PageSize)<>0 THEN (@TotalRow / @PageSize + 1) ELSE (@TotalRow / @PageSize) END);
End Try
Begin Catch
  -- 捕捉错误
  Set @MaxPage = -1;
  Set @Descript = 'error line: ' + CAST(ERROR_LINE() AS varchar(8)) + ', error number: ' + CAST(ERROR_NUMBER() AS varchar(8)) + ', error message: ' + ERROR_MESSAGE();
  Return;
End Catch;

-- 执行成功
Return;
END

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