mysql 存储过程实现从一张表数据迁移到另一种表

    本文档主要是描述怎么在一系列条件下将home_brand_manual_pdf的数据插入到brand_shuomingshu表中

1.首先数据的插入涉及到三张表，分别是home_brand(品牌)，home_brand_manual_pdf（品牌pdf手册），brand_shuomingshu（品牌说明书）（此表刚开始没数据，是空表）

2.表结构分别介绍

home_brand（ 品牌)：

 

 home_brand_manual_pdf （品牌pdf手册）：

brand_shuomingshu（品牌说明书）

3.表迁移需要的一系列条件：

                    home_brand_manual_pdf与brand_shuomingshu表列以及home_brand的关系如下

           （1）列对应满足以下关系

          

home_brand_manual_pdf	brand_shuomingshu	home_brand
id	pdfId
brandId		id（很重要）
name	pdfName
url	url
downloadUrl	downloadUrl
site	site
appId	appId
path	pdfPath
siteMemo	memo
size	pdfSize
error	pdfError
totals	pdfTotals
check	pdfCheck
text	pdfText
status	pdfStatus
createUser	createUser
createDate	createDate
updateDate	updateDate
updateUser	updateUser

       千万注意：

         brandId列的值：  通过brand_shuomingshu.brandName到home_brand表中，根据name查询，得到brand信息，将对应的id，作为home_brand_manual_pdf.brandId

    （2）过滤条件brand_shuomingshu表：status > 0 and pdfStatus > 0（即只需要将该条件下的数据迁移到brand_shuomingshu中）

4.通过存储过程迁移数据，通过navicat(mysql可视化根据)建立的存储过程如下（假设存储过程名字为test）：

BEGIN
-- 需要定义接收游标数据的变量 
  DECLARE idp VARCHAR(255); 
  DECLARE brandIdp VARCHAR(255); 
  DECLARE namep VARCHAR(1000); 
  DECLARE urlp VARCHAR(1000);
	DECLARE downloadUrlp VARCHAR(1000); 
	DECLARE sitep VARCHAR(255);
	DECLARE appIdp VARCHAR(255);
  DECLARE pathp VARCHAR(255);
  DECLARE siteMemop VARCHAR(255);
	DECLARE sizep BIGINT(255); 
	DECLARE errorp VARCHAR(255); 
	DECLARE totalsp int(10);
	DECLARE checkp int(11);
	DECLARE textp  int(11);
	DECLARE statusp TINYINT(255); 
	DECLARE createUserp  VARCHAR(255);
	DECLARE createDatep  TIMESTAMP;
	DECLARE updateDatep  TIMESTAMP;
  DECLARE updateUserp  VARCHAR(255); 
  -- 遍历数据结束标志
  DECLARE done INT DEFAULT FALSE;

  DECLARE cur CURSOR FOR SELECT
		brand_shuomingshu.pdfId AS id,
		home_brand.id AS brandId,
		brand_shuomingshu.pdfName AS `name`,
		brand_shuomingshu.url AS url,
		brand_shuomingshu.downloadUrl AS downloadUrl,
		brand_shuomingshu.site AS site,
		brand_shuomingshu.appId AS appId,
    brand_shuomingshu.pdfPath As path,
    brand_shuomingshu.memo AS siteMemo,
		brand_shuomingshu.pdfSize AS size,
		brand_shuomingshu.pdfError AS error,
		brand_shuomingshu.pdfTotals AS totals,
		brand_shuomingshu.pdfCheck AS `check`,
		brand_shuomingshu.pdfText AS text,
		brand_shuomingshu.pdfStatus AS `status`,
		brand_shuomingshu.createUser AS createUser,
		brand_shuomingshu.createDate AS createDate,
		brand_shuomingshu.updateUser AS updateUser,
		brand_shuomingshu.updateDate AS updateDate
		from brand_shuomingshu,home_brand where  brand_shuomingshu.brandName = home_brand.`name` AND brand_shuomingshu.`status` >0 
 AND brand_shuomingshu.pdfStatus>0;


  -- 将结束标志绑定到游标
  DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
  -- 打开游标
  OPEN cur;
  
  -- 开始循环
  read_loop: LOOP
    -- 提取游标里的数据
    FETCH cur INTO idp,brandIdp,namep,urlp,downloadUrlp,sitep,appIdp,pathp,siteMemop,sizep,errorp,totalsp,checkp,textp,statusp,createUserp,createDatep,updateUserp,updateDatep;
    -- 声明结束的时候
    IF done THEN
      LEAVE read_loop;
    END IF;
    -- 这里做你想做的循环的事件

    INSERT INTO home_brand_manual_pdf VALUES (idp,brandIdp,namep,urlp,downloadUrlp,sitep,appIdp,pathp,siteMemop,sizep,errorp,totalsp,checkp,textp,statusp,createUserp,createDatep,updateUserp,updateDatep);

  END LOOP;
  -- 关闭游标
  CLOSE cur;

END

　　

 

　　然后执行该存储过程call test即可

 

转载于:https://www.cnblogs.com/xiaolin-peter/p/8076010.html