一个通用的SQL语句

if exists (select * from dbo.sysobjects where id = object_id(N‘[dbo].[sys_Page_v2]‘) and OBJECTPROPERTY(id, N‘IsProcedure‘) = 1)
drop procedure [dbo].[sys_Page_v2]
GO
CREATE PROCEDURE [dbo].[sys_Page_v2]
@PCount int output,    --总页数输出
@RCount int output,    --总记录数输出
@sys_Table nvarchar(100),    --查询表名
@sys_Key varchar(50),        --主键
@sys_Fields nvarchar(500),    --查询字段
@sys_Where nvarchar(3000),    --查询条件
@sys_Order nvarchar(100),    --排序字段
@sys_Begin int,        --开始位置
@sys_PageIndex int,        --当前页数
@sys_PageSize int        --页大小
AS
SET NOCOUNT ON
SET ANSI_WARNINGS ON
IF @sys_PageSize < 0 OR @sys_PageIndex < 0
BEGIN        
RETURN
END
DECLARE @new_where1 NVARCHAR(3000)
DECLARE @new_order1 NVARCHAR(100)
DECLARE @new_order2 NVARCHAR(100)
DECLARE @Sql NVARCHAR(4000)
DECLARE @SqlCount NVARCHAR(4000)
DECLARE @Top int
if(@sys_Begin <=0)
    set @sys_Begin=0
else
    set @sys_Begin=@sys_Begin-1
IF ISNULL(@sys_Where,‘‘) = ‘‘
    SET @new_where1 = ‘ ‘
ELSE
    SET @new_where1 = ‘ WHERE ‘ + @sys_Where
IF ISNULL(@sys_Order,‘‘) <> ‘‘ 
BEGIN
    SET @new_order1 = ‘ ORDER BY ‘ + Replace(@sys_Order,‘desc‘,‘‘)
    SET @new_order1 = Replace(@new_order1,‘asc‘,‘desc‘)
    SET @new_order2 = ‘ ORDER BY ‘ + @sys_Order
END
ELSE
BEGIN
    SET @new_order1 = ‘ ORDER BY ID DESC‘
    SET @new_order2 = ‘ ORDER BY ID ASC‘
END
SET @SqlCount = ‘SELECT @RCount=COUNT(1),@PCount=CEILING((COUNT(1)+0.0)/‘
            + CAST(@sys_PageSize AS NVARCHAR)+‘) FROM ‘ + @sys_Table + @new_where1
EXEC SP_EXECUTESQL @SqlCount,N‘@RCount INT OUTPUT,@PCount INT OUTPUT‘,
               @RCount OUTPUT,@PCount OUTPUT
IF @sys_PageIndex > CEILING((@RCount+0.0)/@sys_PageSize)    --如果输入的当前页数大于实际总页数,则把实际总页数赋值给当前页数
BEGIN
    SET @sys_PageIndex =  CEILING((@RCount+0.0)/@sys_PageSize)
END
set @sql = ‘select ‘+ @sys_fields +‘ from ‘ + @sys_Table + ‘ w1 ‘
    + ‘ where ‘+ @sys_Key +‘ in (‘
        +‘select top ‘+ ltrim(str(@sys_PageSize)) +‘ ‘ + @sys_Key + ‘ from ‘
        +‘(‘
            +‘select top ‘ + ltrim(STR(@sys_PageSize * @sys_PageIndex + @sys_Begin)) + ‘ ‘ + @sys_Key + ‘ FROM ‘
        + @sys_Table + @new_where1 + @new_order2 
        +‘) w ‘ + @new_order1
    +‘) ‘ + @new_order2
print(@sql)
Exec(@sql)
GO