In this video, Annyce covers the various characteristics of Room queries. Learn about the difference between static and dynamic queries, and see several examples of working with the SELECT statement.
- [Instructor] Let's talk a bit about Room queries.…First, they're based on raw SQL statements.…This means that you'll be able to work with the variations…of the SQL select statement.…And we're gonna look at a few examples momentarily.…Next, they can either be static or dynamic.…So during run time, you can determine…what values you wanna use in order to query a database.…Third, the results are returned back…to you as objects, not cursors.…This makes it a lot easier to work with.…
And finally, they can be observable.…Now you have the option of configuring Room…to get changes either by means of arch java or live data…from the Android architectural components library.…Now as I mentioned Room relies on raw SQL statements…to generate the needed code to query your database.…So on this first example, we're simply selecting…all fields from all rows of the emails table.…This is one of the most basic select statements we can have.…
In this example we're using the order by clause…in order to sort the results in reverse order by name.…
To begin, Annyce Davis reviews using the de facto data persistence solution available on Android: SQLite. She takes you through basic SQLite concepts—such as how to create a database wrapper and insert data into a table—as well as a few more advanced topics. Next, she covers working with Cupboard, an open-source project dedicated to simplifying your SQLite interactions. To wrap up, she dives into working with Realm, an object database solution designed with mobile devices in mind. Throughout the course, Annyce discusses establishing relationships between database tables, creating and running queries, as well as performing data migrations.
- Overview of SQLite
- Defining a database table's schema
- Exploring SQLite create table syntax
- Executing create table statements
- Inserting data with a foreign key relation
- Inspecting the database using a terminal
- Updating and deleting records
- Working with Cupboard
- Working with Realm
Skill Level Intermediate
Q: This course was updated on 05/24/2018. What changed?
A: New videos were added that cover working with Room.
Android App Development: Unit Testingwith James P White2h 58m Intermediate
Learning Firebase Cloud Messaging for Androidwith Joe Marini52m 49s Intermediate
1. SQLite Basics
2. SQLite Beyond the Basics
3. Working with Room
4. Working with Cupboard
5. Realm Basics
6. Realm Beyond the Basics
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