If you're following the quick start guide, simply select the appropriate adapter for your database of choice when prompted. More information on adapter configuration can be found under the Setup sections.
Note: PostgreSQL requires an additional step to create a database.
Follow the official guide for installing MongoDB on Windows.
By default the Mongoose Adapter will attempt to connect to MongoDB as the current user and create a new database using the project name. You can override these options when configuring the Mongoose Adapter.
The simplest way to install Postgres is using Homebrew.
brew install postgres
By default the Knex Adapter will attempt to connect to a PostgreSQL database as the current user. It will look for a a database matching the project name. You can override these options when configuring the Knex Adapter.
To create database run the following command: