Question

I am writing a script to perform tasks between two MySql databases on the same server, i.e truncate tables on one db and import table rows from another db to this one.

The user who is doing the tasks has full permissions on both databases.

How do I connect to both databases from the command line?

Thanks in advance for any help.

Answer 1

You can use mysqlcommand line utility with the proper parameters:

mysql -u root -h your_host -p your_db

Here root is the privileged user and your_db is the database which is in use by default. You can always switch between databases by typing use another_db command from mysqlconsole.

Also note that you do not have to select dabase (use db_name) in order to execute query on it. You can for example write a query something like this:

SELECT a.id, b.title FROM db1.table1 AS a
LEFT JOIN db2.table AS b ON b.id = a.foreign_id