Learn how to update data in your SQLite database using the ContentValues class. Annyce explains the various parameters involved in the update method in the SQLiteDatabase class.
- [Instructor] Recall that we use…content values to insert records into our database.…The same object is used to update records as well.…Let's take a look at an example.…First, we are creating our content values object…and setting the desired value for the name field.…This is the same process we…followed when inserting an object.…Next, we create the selection string.…This is where we put the criteria…we want to match records against.…
In this case, we only want to update a single record…and that is the user record, with an ID of one.…Finally, we make a call to the…SQLite database's update method.…This takes four parameters, the table name,…the content values, the selection string…and then a string array, which contains the values…that replace any question marks in the selection string.…
That's it, the results of the update method…is an integer which contains the…number of records that have been modified.…Let's say, we have the following records…before the update is performed.…Amber, Joe and Gladys.…Then after the update statement is executed,…
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
Android App Development: Unit Testingwith James P White2h 59m Intermediate
1. SQLite Basics
2. SQLite Beyond the Basics
3. Working with Cupboard
4. Realm Basics
5. Realm Beyond the Basics
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