mssql与mysql 数据迁移

概要：

mssql向mysql迁移的实例，所要用到的工具bcp和load data local infile。

由于订单记录的数据是存放在mssql服务器上的，而项目需求把数据迁移到mysql server，存在的问题mssql和mysql订单表结构不同，所以不能直接导入到mysql中的订单表里面。

解决思路，首先，在mysql数据库新建一张与mssql中订单表结构一样的表，在mssql上利用bcp工具导出数据为csv，然后把导出csv数据上传到mysql服务器上用load data命令行导入表；最后通过存储过程查询循环insert到目标表中。

导出表结构并且修改后，在mysql服务器上创建同样结构的表：（以下图为：mssql导出表结构图）

以下是导出csv相关sql语句

 1 use data_trade;
 2 Go 
 3   
 4 SP_CONFIGURE'show advanced options',1 
 5 RECONFIGURE 
 6 Go 
 7 SP_CONFIGURE 'xp_cmdshell',1 
 8 RECONFIGURE 
 9 Go 
10 
11 EXEC master..xp_cmdshell 'BCP  data_trade.do.t_trade OUT  D:	rade.csv -c -t "jxfield" -T -r "jxrowend"'

由于订单表中的字段比较复杂，字段中包含了逗号，换行和回车等符号，所以从定义的了字段分隔符和行的终止符，分别用 -t -r两个参数定义。

去掉字段中的空号逗号换行符和回车；

$ cat a.csv |  tr -d ' ,^' | sed 's/jxrowend/$^/g' | tr '^' '
' >b.csv

将导出的csv文件上传到mysql服务器上的/tmp目录下并c，然后执行

load data local infile '/tmp/trade.csv'
into table `t_trade`
character set gbk
fields terminated by 'jxfield'
optionally enclosed by '"'
escaped by '"'
lines terminated by 'jxrowend';

查询循环插入到目标表中代码如下：

  1 DELIMITER ;;
  2 
  3 DROP PROCEDURE IF EXISTS `update_trade`;;
  4 CREATE PROCEDURE  `update_trade` ()
  5 BEGIN
  6 -- 需要定义接收游标数据的变量 
  7 DECLARE astorage_id varchar(40);
  8 DECLARE atid varchar(40);
  9 DECLARE apro_detail_code varchar(40);
 10 DECLARE apro_name varchar(255);
 11 DECLARE aspecification varchar(255);
 12 DECLARE abarcode varchar(40);
 13 DECLARE acombine_barcode varchar(40);
 14 DECLARE aiscancel varchar(40);
 15 DECLARE aisscheduled varchar(40);
 16 DECLARE astock_situation varchar(40);
 17 DECLARE aisbook_pro varchar(40);
 18 DECLARE aiscombination varchar(40);
 19 DECLARE aisgifts varchar(40);
 20 DECLARE agift_num int(20);
 21 DECLARE abook_storage varchar(40);
 22 DECLARE apro_num varchar(40);
 23 DECLARE asend_num varchar(40);
 24 DECLARE arefund_num varchar(40);
 25 DECLARE arefund_renum varchar(40);
 26 DECLARE ainspection_num varchar(40);
 27 DECLARE atimeinventory varchar(40);
 28 DECLARE acost_price decimal(20,2);
 29 DECLARE asell_price decimal(20,2);
 30 DECLARE aaverage_price decimal(20,2);
 31 DECLARE aoriginal_price decimal(20,2);
 32 DECLARE asys_price decimal(20,2);
 33 DECLARE aferght decimal(20,2);
 34 DECLARE aitem_discountfee decimal(20,2);
 35 DECLARE ainspection_time varchar(40);
 36 DECLARE aweight varchar(40);
 37 DECLARE ashopid varchar(40);
 38 DECLARE aout_tid varchar(40);
 39 DECLARE aout_proid varchar(40);
 40 DECLARE aout_prosku varchar(40);
 41 DECLARE aproexplain varchar(40);
 42 DECLARE abuyer_memo varchar(40);
 43 DECLARE aseller_remark varchar(255);
 44 DECLARE adistributer varchar(40);
 45 DECLARE adistribut_time varchar(40);
 46 DECLARE asecond_barcode varchar(40);
 47 DECLARE aproduct_no varchar(40);
 48 DECLARE abrand_number varchar(40);
 49 DECLARE abrand_name varchar(40);
 50 DECLARE abook_inventory int(40);
 51 DECLARE aproduct_specification varchar(255);
 52 DECLARE adiscount_amount decimal(20,2);
 53 DECLARE acredit_amount decimal(20,2);
 54 DECLARE aMD5_encryption varchar(40);
 55 
 56 
 57 
 58 -- 遍历数据结束标志
 59   DECLARE done INT DEFAULT FALSE;
 60   -- 游标
 61   DECLARE cur CURSOR FOR SELECT `AC0018`,`TC0013`,`EC0155`,`EC0123`,`ac2037`,`TC0087`,`AI0033`,`EI0734`,`AI0021`,`AM0024`,`TM0030`,`AM0100`,`EQ0147`,`AD0001`,`TC0108`,`EC0155`,`AI0032` FROM `edb_item` order by `AQ2520` asc where `AQ2520`<'2014-04-09 11:31:24' order by `AQ2520` asc;
 62   
 63   -- 将结束标志绑定到游标
 64   DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
 65   -- 打开游标
 66   OPEN cur;
 67   
 68   -- 开始循环
 69   read_loop: LOOP
 70     -- 提取游标里的数据，这里只有一个，多个的话也一样；
 71     FETCH cur INTO  atid,apro_detail_code,apro_name,aspecification,abarcode,astock_situation,agift_num,apro_num,arefund_renum,asell_price,aoriginal_price,aitem_discountfee,ainspection_time,aweight,aout_tid,aproexplain,ainspection_num;
 72     -- 声明结束的时候
 73     IF done THEN
 74       LEAVE read_loop;
 75     END IF;
 76     -- 这里做你想做的循环的事件
 77     -- IF ainspection_num is null THEN SET ainspection_num=0;END IF;
 78     SET astorage_id=null;
 79   SET acombine_barcode=null;
 80   SET aiscancel=null;
 81   SET aisscheduled=null;
 82   SET aisbook_pro=null;
 83   SET aiscombination=null;
 84   SET aisgifts=null;
 85   SET abook_storage=null;
 86   SET asend_num=null;
 87   SET arefund_num=null;
 88   SET atimeinventory=null;
 89   SET acost_price=null;
 90   SET aaverage_price=null;
 91   SET asys_price=null;
 92   SET aferght=null;
 93   SET ashopid=null;
 94   SET aout_proid=null;
 95   SET aout_prosku=null;
 96   SET abuyer_memo=null;
 97   SET aseller_remark=null;
 98   SET adistributer=null;
 99   SET adistribut_time=null;
100   SET asecond_barcode=null;
101   SET aproduct_no=apro_detail_code;
102   SET abrand_number=null;
103   SET abrand_name=null;
104   SET abook_inventory=null;
105   SET aproduct_specification=null;
106   SET adiscount_amount=null;
107   SET acredit_amount=null;
108   SET aMD5_encryption=null;
109      
110     insert into `t_trade_array`(storage_id,tid,pro_detail_code,pro_name,specification,barcode,combine_barcode,iscancel,isscheduled,stock_situation,isbook_pro,iscombination,isgifts,gift_num,book_storage,pro_num,send_num,refund_num,refund_renum,inspection_num,timeinventory,cost_price,sell_price,average_price,original_price,sys_price,ferght,item_discountfee,inspection_time,weight,shopid,out_tid,out_proid,out_prosku,proexplain,buyer_memo,seller_remark,distributer,distribut_time,second_barcode,product_no,brand_number,brand_name,book_inventory,product_specification,discount_amount,credit_amount,MD5_encryption) values (astorage_id,atid,apro_detail_code,apro_name,aspecification,abarcode,acombine_barcode,aiscancel,aisscheduled,astock_situation,aisbook_pro,aiscombination,aisgifts,agift_num,abook_storage,apro_num,asend_num,arefund_num,arefund_renum,ainspection_num,atimeinventory,acost_price,asell_price,aaverage_price,aoriginal_price,asys_price,aferght,aitem_discountfee,ainspection_time,aweight,ashopid,aout_tid,aout_proid,aout_prosku,aproexplain,abuyer_memo,aseller_remark,adistributer,adistribut_time,asecond_barcode,aproduct_no,abrand_number,abrand_name,abook_inventory,aproduct_specification,adiscount_amount,acredit_amount,aMD5_encryption);
111 
112   END LOOP;
113   -- 关闭游标
114   CLOSE cur;
115 
116 END;;
117 DELIMITER ;

若在存储过程出现错误，相关处理可以参考continue handler;