Shell - one line query

Question

I need to execute a mysql query in one line using bash.

It should be something like this:

mysql database --user=\'root\' --password=\'my-password\' <          


        

Answer 1

Writing your password in a command is generally a bad idea (people can read it over your shoulder, it probably gets stored in your shell history, etc.), but you can put your credentials in a file. Giving the file a name starting with . makes it hidden, which is also more secure.

# .db.conf
[client]
database=myDatabase
user=myUserName
password=myPassWord

Make sure only you can read the file:

chmod 600 .db.conf

Then call MySQL like so:

mysql --defaults-extra-file=.db.conf -e "UPDATE database SET field1 = '1' WHERE id = 1111;"

or:

echo "UPDATE database SET field1 = '1' WHERE id = 1111;" | mysql --defaults-extra-file=.db.conf

Note that --defaults-extra-file needs to be the first option supplied to mysql otherwise it freaks out.