Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying MariaDB Cookbook
  • Table Of Contents Toc
  • Feedback & Rating feedback
MariaDB Cookbook

MariaDB Cookbook

By : Daniel Bartholomew
4.2 (9)
close
close
MariaDB Cookbook

MariaDB Cookbook

4.2 (9)
By: Daniel Bartholomew

Overview of this book

Table of Contents (20 chapters)
close
close
MariaDB Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Using JOINs


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).

Getting ready

Import the ISFDB database as described in the Importing the data exported by mysqldump recipe from Chapter 2, Diving Deep into MariaDB.

How to do it...

  1. Launch the mysql command-line client application and connect to the isfdb database on our MariaDB server.

  2. 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;
    
  3. 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;
    
  4. Perform...

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech
bookmark search playlist font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY