sql server2005 rownum通用存储过程分页

最新推荐文章于 2019-09-30 17:49:03 发布

原创最新推荐文章于 2019-09-30 17:49:03 发布 · 1k 阅读

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#sql server #存储 #sql #null #output

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本文介绍了一种使用T-SQL动态生成SQL语句的方法来实现高效分页查询，支持多种参数配置，如指定表名、字段、排序方式等。

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set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go

ALTER   PROCEDURE [dbo].[sp_GetRecordFromPage]
@TableName varchar(350),        --表名
@Fields varchar(5000) = '*',    --字段名(全部字段为*)
@OrderField varchar(5000),        --排序字段(必须!支持多字段)
@sqlWhere varchar(5000) = Null,--条件语句(不用加where)
@pageSize int,                    --每页多少条记录
@pageIndex int = 1,         --指定当前为第几页
@distinct VARCHAR(50)=NULL,   --去除重复值，注意只能是一个字段
@top INT=NULL                --查询TOP,不传为全部
AS
BEGIN
    Declare @sql nvarchar(4000);
    Declare @totalRecord int;
    DECLARE @totalPage INT;
    --计算总记录数
IF (@distinct IS NULL OR @distinct='')
BEGIN
IF (@SqlWhere='' OR @sqlWhere IS NULL)
    SET @sql = 'select @totalRecord = count(1) from ' + @TableName
   ELSE
    SET @sql = 'select @totalRecord = count(1) from ' + @TableName + ' where ' + @sqlWhere
END
ELSE
BEGIN
IF (@SqlWhere='' OR @sqlWhere IS NULL)
    SET @sql = 'select @totalRecord = count(distinct ' + @distinct + ') from ' + @TableName
   ELSE
    SET @sql = 'select @totalRecord = count(distinct ' + @distinct + ') from ' + @TableName + ' where ' + @sqlWhere
END
    EXEC sp_executesql @sql,N'@totalRecord int OUTPUT',@totalRecord OUTPUT--计算总记录数


    IF(@top>0)
    BEGIN
--指定TOP 记录
SET @Fields= 'top ' + CAST(@top AS VARCHAR(20)) + ' ' + @Fields;
--如果总记录数超过TOP数,设总记录数为TOP数
IF(@totalRecord>@top)
   SET @totalRecord=@top
END

    --计算总页数
    SELECT @totalPage=CEILING((@totalRecord+0.0)/@PageSize)
    SELECT @totalRecord AS 'fldtotalRecord',@totalPage AS 'fldTotalPage'

IF (@distinct IS NULL OR @distinct='')
BEGIN
IF (@SqlWhere='' or @sqlWhere IS NULL)
   SET @sql = 'Select * FROM (select ' + @Fields + ',ROW_NUMBER() Over(order by ' + @OrderField + ') as rowId from ' + @TableName
ELSE
   SET @sql = 'Select * FROM (select ' + @Fields + ',ROW_NUMBER() Over(order by ' + @OrderField + ') as rowId from ' + @TableName + ' where ' + @SqlWhere
END
ELSE
BEGIN
IF (@SqlWhere='' or @sqlWhere IS NULL)
   SET @sql = 'Select * FROM (select ' + @Fields + ',ROW_NUMBER() Over(order by ' + @OrderField + ') as rowId from ' + @TableName
ELSE
   SET @sql = 'Select * FROM (select ' + @Fields + ',ROW_NUMBER() Over(order by ' + @OrderField + ') as rowId from ' + @TableName + ' where ' + @SqlWhere
SET @sql=@sql + ' GROUP BY ' + @distinct;
END


    --处理页数超出范围情况

    IF @PageIndex<=0
        SET @pageIndex = 1



     --处理开始点和结束点
    DECLARE @StartRecord INT
    DECLARE @EndRecord int

    SET @StartRecord = (@pageIndex-1)*@PageSize + 1
    SET @EndRecord = @StartRecord + @pageSize - 1

     --继续合成sql语句
    SET @sql = @sql + ') as tempTable where rowId >=' + CONVERT(VARCHAR(50),@StartRecord) + ' and rowid<= ' + CONVERT(VARCHAR(50),@EndRecord)
    Exec(@sql)
end