How to Create DataBase in SQLite, implement ADD EDIT DELETE using javascript

I'm currently using ionic (HTML5, CSS, AngularJS) to create my first android app, this application allows me to create a database and add names quiz exams attendance etc. My problem is I'm new to this sqlite database, and i already watched some tutorials for javascript and sqlite but I'm still having a hard time figuring the sequence of the program, some of the tutorials requires me to open the database before inserting something, and some does not. So, can anyone give me a sample code for creating a database and for the syntax of add edit and delete. I hope someone can help me. I highly appreciate any help that i can get just to improve my skills, thank you.