A database is a structured, organized set of data that is accessible in various ways. In computer science, a database is a software used to store and organize data in the form of rows and columns. A database is just like a file cabinet where you can store data in different locations or sections, called tables. When you need any specific file you look into that particular section i.e. table and get your required file i.e. data.
Basically, WordPress uses MySQL as its database management system. MySQL is a freely available open-source Relational Database Management System (RDBMS) that uses Structured Query Language (SQL). SQL is the most popular language for adding, accessing and managing content in a database. It is popular for its quick processing, proven reliability, ease and flexibility of use. MySQL works best with other popular open-source software, like Apache web server, PHP, and Linux operating system.
Creating a WordPress Database
To install WordPress you need a MySQL database. All WordPress hosting providers offer MySQL included in their hosting packages. During the installation, you provide WordPress your database information, and then WordPress takes care of the rest of the things.
Database host: Database host is the computer hosting your database on a MySQL server. Mostly, it is localhost and entering localhost in the host field would connect WordPress to your database. However, some web hosting providers may use different hostnames to manage MySQL servers. You will find your hostname in the MySQL or Database sections of your hosting control panel. Ask your hosting provider if you cannot find the hostname.
Databases have tables which are like cabinets in your database system. Each table has information stored in the form of rows and columns. Each row has a field for each column in the table.
Example of a simple Database: A database in a hospital may have a table called patient_records. This table may have the following columns:
WordPress will automatically create tables inside your database. At the time of writing this, a default installation of WordPress would create the following tables:
Each of these tables would have different columns where data is stored. For example, the wp_users table in WordPress has these columns: