利用存储过程进行分页

1.大数据通用高效分页

create PROCEDURE [dbo].[GetPageDataOut]
(
@tn nvarchar(30),--表名称
@idn nvarchar(20),--表主键名称
@pi int = 1,--当前页数
@ps int = 7,--每页大小
@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)
SET @sqlCount = 'SELECT @rc=COUNT(['+@idn+']),@pc=CEILING((COUNT('+@idn+')+0.0)/'+ CAST(@ps AS VARCHAR)+') FROM ' + @tn
EXEC SP_EXECUTESQL @sqlCount,N'@rc INT OUTPUT,@pc INT OUTPUT',@rc OUTPUT,@pc OUTPUT

IF @pi = 1
BEGIN
SET @sql='SELECT TOP '+str(@ps) +' * FROM '+@tn
EXEC(@sql)
END
ELSE
BEGIN
SET NOCOUNT ON
DECLARE @PageLowerBound INT,@StartID INT
SET @PageLowerBound = @ps * (@pi-1)
IF @PageLowerBound<1
SET @PageLowerBound=1
SET ROWCOUNT @PageLowerBound
SET @sql=N'SELECT @StartID = ['+@idn+'] FROM '+@tn
print '@sql='+@sql
EXEC sp_executesql @sql,N'@StartID int output',@StartID output
SET ROWCOUNT 0
SET @sql='SELECT TOP '+str(@ps) +' * FROM '+@tn+' WHERE ['+@idn+']>'+ str(@StartID)
EXEC(@sql)
SET NOCOUNT OFF
END

--测试语句
declare @rc int,@pc int
exec GetPageDataOut 'Ams_Area','ar_id',2,15,@rc output,@pc output
select @rc,@pc

---

2.简单通用分页

(
@tn nvarchar(30),--表名称
@idn nvarchar(20),--表主键名称
@pi int = 1,--当前页数
@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
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 [GetPageDataOutRowNumber] 'Ams_Area','ar_id',2,5,'',' ar_id desc',@rc output,@pc output
select @rc,@pc