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Table Of Contents
MariaDB Cookbook
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Joining data from two or more tables is how we unlock the power of a relational database such as MariaDB. There are three basic JOIN types: INNER, CROSS, and LEFT (or OUTER).
Import the ISFDB database as described in the Importing the data exported by mysqldump recipe from Chapter 2, Diving Deep into MariaDB.
Launch the mysql command-line client application and connect to the isfdb database on our MariaDB server.
Perform an INNER JOIN of the authors and emails tables to show us a list of authors and their corresponding e-mail addresses using the following command:
SELECT author_canonical, email_address FROM authors INNER JOIN emails ON authors.author_id = emails.author_id;
Perform a LEFT JOIN of the emails and authors tables to show us a list of authors and their corresponding e-mail addresses using the following command:
SELECT author_canonical, email_address FROM emails LEFT JOIN authors ON authors.author_id = emails.author_id;
Perform...
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