How To Select Database In Mysql and Php

In this tutorial, we will learn how to select a database in MySQL using PHP. Selecting a database is a crucial step in database management, as it helps you work with the existing data and perform various operations on it.

Step 1: Connect to MySQL Database

Before selecting a database, you need to establish a connection between your PHP script and the MySQL server. You can achieve this by using the mysqli_connect() function.

Replace your_username and your_password with your MySQL server credentials.

Step 2: Select the Database

Now that you have successfully connected to the MySQL server, it’s time to select the desired database using the mysqli_select_db() function. This function takes two arguments: the connection object and the database name.

Replace your_database_name with the name of the database you want to use.

Step 3: Perform Operations on the Selected Database

Once you have selected the database, you can now perform various operations on it like creating tables, inserting data, updating data, fetching data, and deleting data. For instance, you can create a table using the following SQL query:

Execute the query using the mysqli_query() function to create a table in the selected database:

Full Code


In this tutorial, you have learned how to connect to the MySQL server and select a database using PHP.

This is the beginning of database manipulation, and from now on you can use this knowledge to perform various operations like creating tables, fetching data, updating data, and deleting data from the selected database.

Keep in mind to always close the connection after completing the operations with the mysqli_close() function to avoid any unnecessary load on your server.