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 usedata_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:\trade.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 '^' '\n' >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 DEFAULTFALSE;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`
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 OPENcur;67
68 --开始循环
69 read_loop: LOOP70 --提取游标里的数据，这里只有一个，多个的话也一样；
71 FETCH cur INTOatid,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 ENDLOOP;113 --关闭游标
114 CLOSEcur;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;
相关参考博文：
