CSV到Mysql导入脚本以匹配字段

Question

是否有这样的脚本或从CSV导入数据到MySQL的方式，可以匹配第一个字段，而不是覆盖数据只会更新行中缺少的字段或值？希望我已经清楚地解释了我自己！

例子：

1,john,doe,programmer 
2,jane,doe,accountant 
3,judy,doe,manager 
1,john,doe,cto 

假设第一个字段是一个ID，我希望脚本插入时，记录不存在，但是当ID已经存在，所以李四将首先把插入的更新程序员，但后来更新为CTO。

Answer 1

从MySQL reference manual，在LOAD DATA section：

替换，而忽略关键字输入行的控制处理是 重复现有行上的唯一键值：

If you specify REPLACE, input rows replace existing rows. 
In other words, rows that have the same value for a primary key or unique index 
as an existing row. See Section 12.2.7, “REPLACE Syntax”. 

If you specify IGNORE, input rows that duplicate an existing row 
on a unique key value are skipped. If you do not specify either 
option, the behavior depends on whether the LOCAL keyword is 
specified. Without LOCAL, an error occurs when a duplicate key value 
is found, and the rest of the text file is ignored. With LOCAL, the 
default behavior is the same as if IGNORE is specified; this is 
because the server has no way to stop transmission of the file in the 
middle of the operation. 

所以我相信，如果你设置您存储的名称作为主键或唯一索引的字段，你应该能够做到：

LOAD DATA LOCAL INFILE 'file.csv' 
REPLACE INTO TABLE yourtable 
FIELDS TERMINATED BY ',' 
LINES TERMINATED BY '\n' 
(id, name, surname, etc); 

---

更新：

刚刚发现了一些关于这个问题的更多资源：

mysql duplicates with LOAD DATA INFILE

http://support.modwest.com/content/6/253/en/how-do-i-import-delimited-data-into-mysql.html

http://codeinthehole.com/archives/35-How-to-sync-a-MySQL-table-between-two-remote-databases..html

Answer 2

尝试以下方法可能有助于您CSV TO MySQl

好运