SQL server 分页方法小结

这里面介绍一下常用的分页方法：

1.使用top来分页

select top @pageSize * from table where id not in 
(select top @pageSize*(@pageIndex-1) id from table) 

 

SELECT   *   FROM   ( 
SELECT   TOP   页面容量   *   FROM   ( 
SELECT   TOP   页面容量*当前页码   *   FROM   
表   WHERE   条件   ORDER   BY   字段A   ASC 
)   AS   TEMPTABLE1   ORDER   BY   字段A   DESC 
)   AS   TEMPTABLE2   ORDER   BY   字段A   ASC

 

2.使用 ROW_NUMBER()OVER 

SELECT * FROM (SELECT ROW_NUMBER() OVER (order by T.字段名 desc )AS Row, T.*  from 表名 T  WHERE 条件 ) TT WHERE TT.Row between 起始位置  and 结束位置;

 StringBuilder strSql = new StringBuilder();
            strSql.Append("SELECT * FROM ( ");
            strSql.Append(" SELECT ROW_NUMBER() OVER (");
            if (!string.IsNullOrWhiteSpace(orderby.Trim()))
            {
                strSql.Append("order by T." + orderby);
            }
            else
            {
                strSql.Append("order by T.ID desc");
            }
            strSql.Append(")AS Row, T.*  from TableName T ");
            if (!string.IsNullOrWhiteSpace(strWhere.Trim()))
            {
                strSql.Append(" WHERE " + strWhere);
            }
            strSql.Append(" ) TT");
            strSql.AppendFormat(" WHERE TT.Row between {0} and {1}", startIndex, endIndex);

 3.使用分页存储过程

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

 

create proc [dbo].[pro_commonpage]
(
@pageindex int, ---当前页的索引
@pagesiz int,--一页显示多少条
@tablename nvarchar(100),---要分页的表名
@prikey varchar(50),--要分页的表名的主键
@condtion varchar(5000),----查询条件
@pagecount int out----按照查询条件查询出的总页数
)
as
-----第一步构建查询的sql语句--------
declare @sql nvarchar(4000), ---查询语句
        @recrdcount int,----记录数据的总行数
        @startindex int,---当前页的第一条数据的行号
        @endindex int----当前页的最后一条数据的行号
 set @sql = 'Select @rCount= count(*)  From '+@tablename+' Where 1= 1 ';---查询除所有的数据并得到数据行数
  if @condtion is not null and @condtion <>N''---当查询条件不为空的时候和不等于“”
  begin
  set @sql=@sql+@condtion;---@sql+查询条件
  end
  print @sql
  ----利用sp_executesql这个存储过程来执行@sql，
  --N'@rcount int out 同@sql中的@rcount对应声明变量，将@recrdcount赋值替换@rcount
  exec sp_executesql @sql,N'@rcount int out',@recrdcount out;
  ---计算最大分页数
  
  set @pagecount=CEILING(@recrdcount*1.0/@pagesiz);--ceiling函数就是将小数位抹去并在整数位加1，
  if(@pageindex>@pagecount)---当当前页的页码大于最大页的页码
  begin
  set @pageindex=@pagecount ---设置当前页的页码为最大页的页码
  end
  
  set @startindex=(@pageindex-1)*@pagesiz+1---设置当前页的起始行号
  set @endindex =@pageindex*@pagesiz ----设置当前页的最后一条数据的行号
  ---构建分页的sql
  set @sql=''
  set @sql='select row_number() over (order by '+@prikey+' asc)as rowid,*from ' + @tablename +' where 1=1'---开窗函数获取当前查询表的数据行数
  if @condtion is not null and @condtion <>N'' --如果查询条件不为空
  begin
  set @sql=@sql+@condtion ---为sql加上查询条件
  end
  set @sql = 'Select * From ('+@sql+') as tc where tc.rowid between '+convert(varchar(5),@startIndex)+' and '+convert(varchar(5),@endIndex)+'';
  print @sql
  exec (@sql)

GO