At Hostinger, you can easily create and manage your databases with just a few clicks. To create a new database, navigate to Websites → Manage, search for Management on the sidebar, and click on it:
Next, make sure the website to which the database will be assigned is selected on the left drop-down menu:
In the section Create a New MySQL Database And Database User, enter your database name, username, and password, keeping the following in mind:
The first part of the database and username (eg. u123456789) is unique and cannot be removed or changed
Each database can only have one user. If you require multiple users, consider a VPS plan
The database password must contain at least one number and one uppercase and lowercase letter, with a minimum length of 8 characters
Next, then click on Create:
Once done, the new database will be assigned to the selected domain automatically and appear in the List of Current MySQL Databases And Users section, where you will be able to manage it.