Tell us a little more about the database you’re using.
Basically you’ll want to be running a server which hosts the database. Your client makes requests for data to the server, for example by using the $http angular service to send a message to the server asking for specific data. The server looks at the message and responds accordingly by sending a message back.
So you’ll likely want to know something about servers and server side languages too, like PHP or NodeJS, or by using a service like Firebase which can be easier depending on the project.