Question

是否有这样的脚本或将数据从CSV导入mysql的方式可以匹配第一个字段，所以而不是覆盖数据只会更新行中缺少的字段或值？希望我已经足够清楚地解释了自己！

示例：

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，我希望脚本在记录不存在时插入但在ID已经存在时更新，因此John Doe将首先作为程序员插入，但随后更新为CTO。

Answer 1

MySQL reference manual中的LOAD DATA section：

REPLACE和IGNORE关键字控制输入行的处理复制唯一键值上的现有行：

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.

所以我相信如果您设置将名称存储为主键或唯一索引的字段，您应该可以这样做：

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

更新

刚刚找到了关于这个主题的更多资源：

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

尝试以下内容可能对您有所帮助CSV TO MySQl

祝你好运

CSV到Mysql导入脚本以匹配字段

2 个答案: