實(shí)現(xiàn)SQL分頁(yè)的存儲(chǔ)過(guò)程代碼

USE [SendMessage]
GO
/****** Object: StoredProcedure [dbo].[pages]  Script Date: 07/09/2015 13:46:50 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROC [dbo].[pages]
(
@tbname   nvarchar(100),        --要分頁(yè)顯示的表名
@FieldKey  nvarchar(1000),   --用于定位記錄的主鍵(惟一鍵)字段,可以是逗號(hào)分隔的多個(gè)字段
@PageCurrent int=1,        --要顯示的頁(yè)碼
@PageSize  int=10,        --每頁(yè)的大小(記錄數(shù))
@FieldShow nvarchar(1000)='',   --以逗號(hào)分隔的要顯示的字段列表,如果不指定,則顯示所有字段
@FieldOrder nvarchar(1000)='',   --以逗號(hào)分隔的排序字段列表,可以指定在字段后面指定DESC/ASC
@WhereString  nvarchar(1000)=N''   --查詢條件
)
AS
begin
 
IF ISNULL(@FieldKey,N'')=''
BEGIN
  RAISERROR(N'分頁(yè)處理需要主鍵（或者惟一鍵）',1,16)
  RETURN
END
 
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(@WhereString,N'')=N''
  SET @WhereString=N''
ELSE
  SET @WhereString=N'WHERE '+@WhereString+N''
 
--計(jì)算分頁(yè)顯示的TOPN值
DECLARE @TopN varchar(20),@StartRecord varchar(20),@EndRecord varchar(20)
SELECT @TopN=@PageSize,
  @StartRecord=(@PageCurrent-1)*@PageSize+1,
  @EndRecord=(@PageCurrent-1)*@PageSize+@PageSize
 
--第一頁(yè)直接顯示
IF @PageCurrent=1
  EXEC(N'SELECT TOP '+@TopN
    +N' '+@FieldShow
    +N' FROM '+@tbname
    +N' '+@WhereString
    +N' '+@FieldOrder)
ELSE
EXEC(N'with temptbl as(
select ROW_NUMBER() Over('+@FieldOrder+') as row, '+@FieldKey+' from '+@tbname+N' '+@WhereString+')
select '+@FieldShow+' from (select B.* from (select '+@FieldKey+' from temptbl where row between '+@StartRecord+' and '+@EndRecord+')A left join '+@tbname+' B on A.'+@FieldKey+'=B.'+@FieldKey+')C')
 
END