Book Image

The MySQL Workshop

By : Thomas Pettit, Scott Cosentino
5 (1)
Book Image

The MySQL Workshop

5 (1)
By: Thomas Pettit, Scott Cosentino

Overview of this book

Do you want to learn how to create and maintain databases effectively? Are you looking for simple answers to basic MySQL questions as well as straightforward examples that you can use at work? If so, this workshop is the right choice for you. Designed to build your confidence through hands-on practice, this book uses a simple approach that focuses on the practical, so you can get straight down to business without having to wade through pages and pages of dull, dry theory. As you work through bite-sized exercises and activities, you'll learn how to use different MySQL tools to create a database and manage the data within it. You'll see how to transfer data between a MySQL database and other sources, and use real-world datasets to gain valuable experience of manipulating and gaining insights from data. As you progress, you'll discover how to protect your database by managing user permissions and performing logical backups and restores. If you've already tried to teach yourself SQL, but haven't been able to make the leap from understanding simple queries to working on live projects with a real database management system, The MySQL Workshop will get you on the right track. By the end of this MySQL book, you'll have the knowledge, skills, and confidence to advance your career and tackle your own ambitious projects with MySQL.
Table of Contents (22 chapters)
1
Section 1: Creating Your Database
6
Section 2: Managing Your Database
11
Section 3: Querying Your Database
16
Section 4: Protecting Your Database

Solution to Activity 5.2

First, try to use a way of getting this data by querying the film table and using GROUP BY on the release year; however, this will only return information for years in which films have been released. In our database, all films are released in a single year. So, you want to generate a range of years and then join this with the data you have to make sure that all the years are included, even if there were no films released in that year according to our database. Follow these steps to complete this activity:

  1. Open the MySQL client and connect to the sakila database:
    USE sakila

This produces the following output:

Figure 16.36 – The USE output

  1. Inspect the result of the naive approach by writing the following query:
    SELECT release_year, COUNT(*) FROM film
    WHERE release_year BETWEEN 2005 AND 2010
    GROUP BY release_year;

This produces the following output:

Figure 16.37 – The SELECT...