通用分页存储过程

/****** Object:  StoredProcedure [dbo].[sp_CommonPaging]    Script Date: 08/03/2015 21:06:14 ******/
--通用分页存储过程
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
Create PROCEDURE [dbo].[sp_CommonPaging]
(
@tn nvarchar(30),--表名称
@idn nvarchar(20),--表主键名称
@pi int = 1,--当前页码
@ps  int = 7,--每页大小 
@wh nvarchar(255) = '',--wehre查询条件
@oby nvarchar(255) = '',--orderby 排序
@rc int output,--总行数(传出参数)
@pc int output--总页数(传出参数)
)
AS
DECLARE @sql NVARCHAR(225)='',@sqlCount NVARCHAR(225)=''
--1.计算总行数和总页数
SET @sqlCount = 'SELECT @rc=COUNT(['+@idn+']),@pc=CEILING((COUNT('+@idn+')+0.0)/'+ CAST(@ps AS VARCHAR)+') FROM ' + @tn
IF LEN(@wh)>1
    set @sqlCount=@sqlCount+' WHERE '+@wh
print @sqlCount
EXEC SP_EXECUTESQL @sqlCount,N'@rc INT OUTPUT,@pc INT OUTPUT',@rc OUTPUT,@pc OUTPUT
--2.分页
--2.1如果是第一页，则直接查询
IF @pi = 1
BEGIN
    SET @sql='SELECT TOP '+str(@ps) +' * FROM '+@tn
    IF LEN(@wh)>1
        set @sql=@sql+' WHERE '+@wh
    IF LEN(@oby)>1
            SET @sql=@sql+' order by ' +@oby
 print @sql
EXEC(@sql)
END
ELSE--2.2如果不是第一页，则拼接查询语句
BEGIN
    SET NOCOUNT ON
    SET @sql='SELECT * FROM (select row_number() over(order by '
    IF LEN(@oby)>1
        set @sql=@sql + @oby+') as rowNum,* from '+@tn
    else
        set @sql=@sql + @idn+') as rowNum,* from '+@tn
    IF LEN(@wh)>1
        set @sql=@sql+' where '+@wh
    set @sql=@sql+')as temp where rowNum>'+str(@ps * (@pi-1))+' and rowNum<='+str(@ps*@pi)
    print @sql
    EXEC(@sql)
    SET NOCOUNT OFF
END
 
----测试语句
--declare @rc int,@pc int
--exec [sp_CommonPaging] 'CartInfo','Id',2,5,'',' Id desc',@rc output,@pc output
--select @rc,@pc