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Creating a User Database and Table Using SQL

Many PHP applications require a user table to store login information. In this tutorial, you will create a database, create a users table, and add your first user account using SQL statements in phpMyAdmin.

Open phpMyAdmin

Open phpMyAdmin in your browser.

Example:

http://localhost/phpmyadmin/

Once phpMyAdmin has loaded, select the SQL tab.

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Create a Database

Run the following SQL statement:

CREATE DATABASE project_db;

Select the new database:

USE project_db;

The database will store all of the tables required for your project.

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Create a Users Table

Run the following SQL statement:

CREATE TABLE users (
    user_id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL,
    password VARCHAR(255) NOT NULL
);

This creates a table named users containing:

Field Purpose
user_id Unique identifier for each user
username Stores the username
password Stores the password

The user_id field is the primary key. Every record in the table must have a unique primary key value. The AUTO_INCREMENT setting automatically generates the next available number whenever a new user is added.

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Create the First User Account

Run the following SQL statement:

INSERT INTO users (username, password)
VALUES ('admin', 'password123');

This creates a user account with the username admin and password password123.

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View the Data

To display all records stored in the table, run:

SELECT * FROM users;

You should see something similar to:

user_id username password
1 admin password123

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Add Another User

Additional users can be added using the same INSERT statement:

INSERT INTO users (username, password)
VALUES ('teacher', 'secret123');

Display the table again:

SELECT * FROM users;

Result:

user_id username password
1 admin password123
2 teacher secret123

Notice that the user_id value automatically increases for each new user.

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Security Note

In this tutorial, passwords are stored as plain text so the table structure is easy to understand.

In a real application, passwords should never be stored this way. The next tutorial will demonstrate how to securely store passwords using password hashing.

Complete SQL Script

CREATE DATABASE project_db;

USE project_db;

CREATE TABLE users (
    user_id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL,
    password VARCHAR(255) NOT NULL
);

INSERT INTO users (username, password)
VALUES ('admin', 'password123');

INSERT INTO users (username, password)
VALUES ('teacher', 'secret123');

SELECT * FROM users;

You now have a database and user table ready to connect to a PHP login system.

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