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    SQL Server 远程更新目标表数据的存储过程

    栏目:Linux/apache问题 时间:2019-12-08 09:45

    本文给大家分享一个远程更新目标库数据的存储过程,适用于更新列名一致,主键为Int类型,可远程链接的数据库。

    USE [Table]--切换到源表,就是数据最新的那个表
    GO
    /****** Object: StoredProcedure [dbo].[proc_DataUpdate] Script Date: 2018/5/4 15:08:56 ******/
    SET ANSI_NULLS ON
    GO
    SET QUOTED_IDENTIFIER ON
    GO
    -- =============================================
    -- Author: <Grom>
    -- Create date: <2018-05-04>
    -- Description: <分批更新远程数据,仅支持主键为int表>
    -- =============================================
    CREATE PROCEDURE [dbo].[proc_DataUpdate]
    @TargetInstance nvarchar(max),
    @TargetDBName nvarchar(max),
    @TargetUID nvarchar(max),
    @TargetPWD nvarchar(max),
    @LocalDBName nvarchar(max),
    @PK_ID nvarchar(max),--主键列(必须为数字)
    @Column nvarchar(max),--更新列名集合
    @ExecSize int--每次执行数量
    AS
    declare @sql nvarchar(max),
    @NumMax int=0,
    @NumMin int=0,
    @MaxID int 
    BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    -- SET NOCOUNT ON;--打开注释可不显示执行过程,提高速度
    begin try
      --取最大值
      set @sql = 'select @MaxID=MAX('+@PK_ID+') from '+@LocalDBName;
      exec sp_executesql @sql,N'@MaxID int out',@MaxID out
      --循环
      while(@NumMax<@MaxID)
      begin
        if exists (select * from tempdb.dbo.sysobjects where id = object_id(N'tempdb..##tmp_table') and type='U')
        drop table ##tmp_table;
        SET @sql = 'select top '+cast(@ExecSize as nvarchar(1000))+' '+ @Column +' into ##tmp_table from '+@LocalDBName+' where '+@PK_ID+'>'+cast(@NumMax as nvarchar(150));
        exec sp_executesql @sql;
        --记录执行最大值
        SET @SQL='select @NumMax=MAX('+@PK_ID+') from ##tmp_table';
        exec sp_executesql @sql,N'@NumMax int out',@NumMax out;
        --记录执行最小值
        SET @SQL='select @NumMin=MIN('+@PK_ID+') from ##tmp_table'; 
        exec sp_executesql @sql,N'@NumMin int out',@NumMin out;
        SET @sql='delete openrowset(''SQLOLEDB'','''+@TargetInstance+''';'''+@TargetUID+''';'''+@TargetPWD+''',['+@TargetDBName+'].[dbo].['+@LocalDBName+']) 
        where '+@PK_ID+' between '+cast(@NumMin as nvarchar(200))+' and '+cast(@NumMax as nvarchar(200));
        exec sp_executesql @sql;
        SET @sql='insert into openrowset(''SQLOLEDB'','''+@TargetInstance+''';'''+@TargetUID+''';'''+@TargetPWD+''',['+@TargetDBName+'].[dbo].['+@LocalDBName+'])
        ('+@Column+')
        select '+ @Column +' from ##tmp_table'
        exec sp_executesql @sql;
      end
      --删除多余数据
      SET @sql='delete openrowset(''SQLOLEDB'','''+@TargetInstance+''';'''+@TargetUID+''';'''+@TargetPWD+''',['+@TargetDBName+'].[dbo].['+@LocalDBName+']) 
      where '+@PK_ID+' >'+cast(@NumMax as nvarchar(200));
      drop table ##tmp_table;
      print 'Success';
    end try
    begin catch
      select Error_number() as ErrorNumber, --错误代码
      Error_severity() as ErrorSeverity, --错误严重级别,级别小于10 try catch 捕获不到
      Error_state() as ErrorState , --错误状态码
      Error_Procedure() as ErrorProcedure , --出现错误的存储过程或触发器的名称。
      Error_line() as ErrorLine, --发生错误的行号
      Error_message() as ErrorMessage --错误的具体信息
      drop table ##tmp_table;
    end catch
    END