CSV到Mysql導入腳本以匹配字段

Question

是否有這樣的腳本或從CSV導入數據到MySQL的方式，可以匹配第一個字段，而不是覆蓋數據只會更新行中缺少的字段或值？希望我已經清楚地解釋了我自己！

例子：

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

假設第一個字段是一個ID，我希望腳本插入時，記錄不存在，但是當ID已經存在，所以李四將首先把插入的更新程序員，但後來更新爲CTO。

Answer 1

從MySQL reference manual，在LOAD DATA section：

替換，而忽略關鍵字輸入行的控制處理是 重複現有行上的唯一鍵值：

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，如果你設置您存儲的名稱作爲主鍵或唯一索引的字段，你應該能夠做到：

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

---

更新：

剛剛發現了一些關於這個問題的更多資源：

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

嘗試以下方法可能有助於您CSV TO MySQl

好運