Question

This is similar to another question (http://stackoverflow.com/questions/935556/mysql-dump-by-query) but I hope different enough.

I want to export a specific items from a db table so I can back it up for possible future restoration.

I’m already using something like this from another table…

mysqldump --user="user" --password="password" --opt -w"id=1" databasebname tablename

But now I need something more complex.

I have the following query that I need to use to generate the export data…

SELECT tbl2.*
FROM tbl1, tbl2
WHERE tbl2.parent = tbl1.child
AND tbl1.id = 1

Can I do this with mysqldump?

Or do I need to think of a different approach?

(If it helps, this is all being done from within a bash script)

Answer 1

I think this will accomplish what you’re looking for:

SELECT tbl2.*
FROM tbl1, tbl2
WHERE tbl2.parent = tbl1.child
AND tbl1.id = 1
INTO OUTFILE '/path/to/file.csv'
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\n'

This will save your data into a CSV file. You can also save into other formats. I found a helpful tutorial on this topic a while back from here