Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member

Creating a database

From: PHP with MySQL Essential Training

Video: Creating a database

In this movie we're going to learn how to log into MySQL and then we're going to create our first database. Now low into MySQL from the command line. That's how we're going to interact with MySQL is from the command line. There are other tools that will let you connect to MySQL. We're going to be sticking with the command which is going to be the simplest version. From my Mac I'm going to be doing that from terminal. I've already asked it MySQL--version which just lets me know that MySQL is there, it's been found, and it's a reasonably recent version. If you don't get something useful back from doing that, you may need to go back to the installation configuration section and get yourself set up before you come back here. Once we have everything set up, and working though, then we can log into MySQL using MySQL.

Creating a database

In this movie we're going to learn how to log into MySQL and then we're going to create our first database. Now low into MySQL from the command line. That's how we're going to interact with MySQL is from the command line. There are other tools that will let you connect to MySQL. We're going to be sticking with the command which is going to be the simplest version. From my Mac I'm going to be doing that from terminal. I've already asked it MySQL--version which just lets me know that MySQL is there, it's been found, and it's a reasonably recent version. If you don't get something useful back from doing that, you may need to go back to the installation configuration section and get yourself set up before you come back here. Once we have everything set up, and working though, then we can log into MySQL using MySQL.

And then the user that we want to log in as, -U, and then root. That's going to tell it that we want to log in as the root user, that's the default user and also the most powerful user in MySQL. And then we need to provide the password for root. We set up a password in the configuration section, so the password would be dash, dash, password equals, and you could write your password out there. Or it's more secure if we don't want to show it to use dash p and then we hit Return, It'll come up and ask us for that password. The password that I set up in configuration was johnpaulgeorgeringo.

All run together and all lower case. You may have set up something different. You'll want to use that here. So johnpaulgeorgeringo. When I hit Return it says welcome to MySQL. I'm now inside MySQL. You can tell that because there's a prompt here that says MySQL, and it's waiting for my commands. The commands all need to end with a semicolon. You can see that it says help semicolon here is the command that we use if we want to get help. Well, the first command we're going to learn is actually exit semicolon, and that will just exit us back out of it.

And quit would work also. Let's hit the up arrow, then, from the terminal, and we'll log back in, johnpaulgeorgeringo. Okay, so now it's here waiting for our commands. Let's learn our first four MySQL commands. The first command is Show Databases, and this tells MySQL, show me a list of all the databases that you're currently holding onto, that you know about. Remember, MySQL can hold more than one database. We're only going to be working with one database though. And we're going to need to create that database, it doesn't exist yet.

And we'll do that with Create Database followed by the name of the database that we want to use. Now the capitalization doesn't strictly matter, but it is a best practice that makes your code more readable. So, typically the commands that are for MySQL, the MySQL keywords, are going to be in all caps. And then your code, your field names and table names. Will be followed by that in whatever case you've got them in, and I prefer lowercase with underscores. And then all of these commands end with a semicolon, so once we've created the database, then we'll need to use the database. That'll switch us into the database so that we can start using it.

If we wanted, instead, to get rid of the database, we could drop it. That's the opposite of creating it. So, it's not delete, it's drop. And that drops not just the database, but all of the tables and all of the data that are in there. So, it's a big deal, you don't drop your database casually. So, let's try the first one of these. Show databases semicolon, and there you go. It gives me a list of the databases that MySQL knows about. It already has a few databases. These are databases that are there for its purposes. We don't need to worry about them. It doesn't have our database yet. So, let's create that Create Database and what should we call it. Well the application that we're going to be creating a little later on its going to be a content management system for a fictional company called widget corp.

So, that's what I'm going to call this widget corp with a semicolon after it. So, that's going to create this database for us. Now, I'm going to use the up arrow two times. And that'll take me back to the show databases command again. Save me from retyping it. I'll hit Return. And now, we see our database in that list. If we want to use that database, then we use the use command. And it switches us into it. So, now it says, database changed. Before we were just in MySQL generally, now we're actually in our database. And that makes it so that when we issue commands MySQL will know which database those commands are concerning. If we had more than one database, this is also how you would move between the different databases.

Now we could do drop database that was the other command that we learned. We could remove it and any tables that it contains but we won't do that now. And again you'll want to be careful, you don't want to drop a database that you don't mean to. When we connected to MySQL. We logged in as the root user and I mentioned that that's the most powerful user with lots of access privileges to perform actions inside MySQL from creating tables to dropping them. We could log in as root from our application too, but I think that's a rally bad habit. I think it's much better to create a new MySQL user, assign it a password and then grant access to our database to that user.

It limits the scope of access for that user to just a single database. And if that user was ever compromised they wouldn't have anything more than what's in that single database. It's better security and there's no excuse for not doing it because it's super easy to set up. All we have to do is have a simple command where we say grant all privileges on our database name, followed by a dot and an asterisk. That means all tables on that database, to whatever the username is, at localhost identified by password. The fact that it's from localhost means that the user can only log in from the same computer.

You won't be able to remotely log in from another IP address as this user, only locally. And then after we create those privileges, we can just check that they were there by using the command Show Grants For. And it'll show us the privileges that have been assigned for that user. Let's do this now. So I'm just going to clear my screen, bring it back up at the top, and let's type Grant All Privileges. Make sure you spell that correctly. Grant all privileges on, and then the name of our database. A period and an asterisk.

That means all tables on the database. And then, I'm going to type a space and hit Return. Now, I could just keep typing, but it will let me type a return, and then, since I haven't typed the semicolon yet, it expects that the command is still going. So, then, To and then, I'm going to give my new user a name here. This is the new user I'm inventing. I'm going to call it widget_cms at localhost. And then another space followed by a Return. And then identified by and then whatever password you want to use here.

So, I'm going to make this secret password. You'll want to use something that's a little better than that. But now I'm going to have two passwords on my system, my root user password, and then my widget_cms password, which is just secret password. So, I'll hit Return, and then if I want to see if that took place I can type show grants for widget_cms at. Local host. And there it shows, so there, you can see that widget cms has privileges. Now, don't worry about the specifics of what those privileges mean. The fact that we see anything there means that our command worked.

So, now let's try exiting. 'Kay, now let's try logging back in, this time MySQL -u widget_cms dash p. And let's do one other thing before we hit Return, which is that we can specify the database that we want it to drop us into. That is, it saves us from having to type use. We go into MySQL and instantly get switched in to this database. Most often, I think this is how you'll use the command. You'll go ahead and put yourself right in the database that you want to use. So now, I'll type my new password, secret password.

And there I am. Now, I'm inside. Now let's do, Show Databases. You can see that I don't see all of the same databases that I used to see. I have much more limited access now than I did before, that's a good thing. So, now that we have our database created, we're ready to create our first database table.

Show transcript

This video is part of

Image for PHP with MySQL Essential Training
PHP with MySQL Essential Training

131 video lessons · 38010 viewers

Kevin Skoglund
Author

 
Expand all | Collapse all
  1. 4m 8s
    1. Welcome
      1m 0s
    2. Using the exercise files
      3m 8s
  2. 15m 6s
    1. What is PHP?
      3m 52s
    2. The history of PHP
      2m 51s
    3. Why choose PHP?
      4m 10s
    4. Installation overview
      4m 13s
  3. 54m 53s
    1. Overview
      2m 33s
    2. Working with Apache Web Server
      6m 56s
    3. Changing the document root
      7m 24s
    4. Enabling PHP
      6m 16s
    5. Upgrading PHP
      3m 30s
    6. Configuring PHP
      10m 3s
    7. Installing MySQL
      5m 46s
    8. Configuring MySQL
      7m 24s
    9. Text editor
      5m 1s
  4. 31m 25s
    1. Overview
      3m 27s
    2. Installing WampServer
      5m 46s
    3. Finding the document root
      2m 24s
    4. Configuring PHP
      8m 12s
    5. Configuring MySQL
      5m 45s
    6. Text editor
      5m 51s
  5. 19m 12s
    1. Embedding PHP code on a page
      6m 43s
    2. Outputting dynamic text
      5m 55s
    3. The operational trail
      2m 27s
    4. Inserting code comments
      4m 7s
  6. 1h 18m
    1. Variables
      7m 50s
    2. Strings
      4m 38s
    3. String functions
      8m 54s
    4. Numbers part one: Integers
      6m 27s
    5. Numbers part two: Floating points
      5m 25s
    6. Arrays
      10m 0s
    7. Associative arrays
      6m 37s
    8. Array functions
      6m 33s
    9. Booleans
      3m 50s
    10. NULL and empty
      5m 15s
    11. Type juggling and casting
      8m 27s
    12. Constants
      4m 43s
  7. 27m 37s
    1. If statements
      6m 0s
    2. Else and elseif statements
      4m 16s
    3. Logical operators
      7m 30s
    4. Switch statements
      9m 51s
  8. 42m 15s
    1. While loops
      8m 41s
    2. For loops
      5m 59s
    3. Foreach loops
      8m 16s
    4. Continue
      8m 28s
    5. Break
      4m 8s
    6. Understanding array pointers
      6m 43s
  9. 37m 25s
    1. Defining functions
      8m 25s
    2. Function arguments
      5m 32s
    3. Returning values from a function
      7m 33s
    4. Multiple return values
      4m 53s
    5. Scope and global variables
      6m 2s
    6. Setting default argument values
      5m 0s
  10. 20m 18s
    1. Common problems
      3m 47s
    2. Warnings and errors
      8m 36s
    3. Debugging and troubleshooting
      7m 55s
  11. 57m 57s
    1. Links and URLs
      5m 33s
    2. Using GET values
      5m 35s
    3. Encoding GET values
      8m 41s
    4. Encoding for HTML
      9m 26s
    5. Including and requiring files
      7m 40s
    6. Modifying headers
      6m 45s
    7. Page redirection
      6m 43s
    8. Output buffering
      7m 34s
  12. 1h 3m
    1. Building forms
      7m 28s
    2. Detecting form submissions
      5m 59s
    3. Single-page form processing
      7m 57s
    4. Validating form values
      10m 40s
    5. Problems with validation logic
      9m 54s
    6. Displaying validation errors
      7m 23s
    7. Custom validation functions
      6m 28s
    8. Single-page form with validations
      7m 25s
  13. 28m 5s
    1. Working with cookies
      2m 49s
    2. Setting cookie values
      5m 55s
    3. Reading cookie values
      6m 1s
    4. Unsetting cookie values
      4m 51s
    5. Working with sessions
      8m 29s
  14. 48m 39s
    1. MySQL introduction
      6m 43s
    2. Creating a database
      7m 41s
    3. Creating a database table
      7m 42s
    4. CRUD in MySQL
      5m 48s
    5. Populating a MySQL database
      7m 32s
    6. Relational database tables
      6m 40s
    7. Populating the relational table
      6m 33s
  15. 56m 4s
    1. Database APIs in PHP
      4m 51s
    2. Connecting to MySQL with PHP
      7m 45s
    3. Retrieving data from MySQL
      8m 47s
    4. Working with retrieved data
      6m 12s
    5. Creating records with PHP
      6m 58s
    6. Updating and deleting records with PHP
      9m 6s
    7. SQL injection
      3m 5s
    8. Escaping strings for MySQL
      6m 45s
    9. Introducing prepared statements
      2m 35s
  16. 35m 58s
    1. Blueprinting the application
      7m 19s
    2. Building the CMS database
      5m 14s
    3. Establishing your work area
      4m 38s
    4. Creating and styling the first page
      4m 22s
    5. Making page assets reusable
      6m 36s
    6. Connecting the application to the database
      7m 49s
  17. 32m 49s
    1. Adding pages to the navigation subjects
      5m 58s
    2. Refactoring the navigation
      6m 7s
    3. Selecting pages from the navigation
      6m 2s
    4. Highlighting the current page
      5m 26s
    5. Moving the navigation to a function
      9m 16s
  18. 1h 45m
    1. Finding a subject in the database
      9m 48s
    2. Refactoring the page selection
      10m 52s
    3. Creating a new subject form
      6m 55s
    4. Processing form values and adding subjects
      11m 20s
    5. Passing data in the session
      9m 16s
    6. Validating form values
      9m 40s
    7. Creating an edit subject form
      8m 30s
    8. Using single-page submission
      7m 44s
    9. Deleting a subject
      9m 44s
    10. Cleaning up
      10m 37s
    11. Assignment: Pages CRUD
      4m 30s
    12. Assignment results: Pages CRUD
      6m 10s
  19. 39m 26s
    1. The public appearance
      8m 52s
    2. Using a context for conditional code
      11m 37s
    3. Adding a default subject behavior
      6m 9s
    4. The public content area
      5m 51s
    5. Protecting page visibility
      6m 57s
  20. 1h 3m
    1. User authentication overview
      4m 3s
    2. Admin CRUD
      8m 41s
    3. Encrypting passwords
      7m 26s
    4. Salting passwords
      5m 42s
    5. Adding password encryption to CMS
      11m 54s
    6. New PHP password functions
      3m 13s
    7. Creating a login system
      11m 28s
    8. Checking for authorization
      5m 48s
    9. Creating a logout page
      5m 40s
  21. 2m 4s
    1. Next steps
      2m 4s

Start learning today

Get unlimited access to all courses for just $25/month.

Become a member
Sometimes @lynda teaches me how to use a program and sometimes Lynda.com changes my life forever. @JosefShutter
@lynda lynda.com is an absolute life saver when it comes to learning todays software. Definitely recommend it! #higherlearning @Michael_Caraway
@lynda The best thing online! Your database of courses is great! To the mark and very helpful. Thanks! @ru22more
Got to create something yesterday I never thought I could do. #thanks @lynda @Ngventurella
I really do love @lynda as a learning platform. Never stop learning and developing, it’s probably our greatest gift as a species! @soundslikedavid
@lynda just subscribed to lynda.com all I can say its brilliant join now trust me @ButchSamurai
@lynda is an awesome resource. The membership is priceless if you take advantage of it. @diabetic_techie
One of the best decision I made this year. Buy a 1yr subscription to @lynda @cybercaptive
guys lynda.com (@lynda) is the best. So far I’ve learned Java, principles of OO programming, and now learning about MS project @lucasmitchell
Signed back up to @lynda dot com. I’ve missed it!! Proper geeking out right now! #timetolearn #geek @JayGodbold
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ .

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed PHP with MySQL Essential Training.

Return to your organization's learning portal to continue training, or close this page.


OK
Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member ?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferences from the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Learn more, save more. Upgrade today!

Get our Annual Premium Membership at our best savings yet.

Upgrade to our Annual Premium Membership today and get even more value from your lynda.com subscription:

“In a way, I feel like you are rooting for me. Like you are really invested in my experience, and want me to get as much out of these courses as possible this is the best place to start on your journey to learning new material.”— Nadine H.

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.