Mysql 如何使用工作表选项以 csv 格式输出文件？

Question

我想将数据从 mysql 导出到 csv。有很多表，所以我想要一个包含很多表的 csv 文件。如何实现？

我想是这样的:

SELECT *
FROM product
WHERE active = 1
INTO OUTFILE '/root/tmp/data.csv'
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n';

SELECT *
FROM member
WHERE active = 1
INTO OUTFILE '/root/tmp/data.csv' // using the same .csv
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n';

etc...

Answer 1

您不能使用 INTO OUTFILE 附加到现有文件。

https://dev.mysql.com/doc/refman/5.7/en/select-into.html说:

file_name cannot be an existing file, which among other things prevents files such as /etc/passwd and database tables from being destroyed.

因此您必须将每个表输出到不同的文件，然后自己将它们连接在一起(也就是说，不使用 SQL)。