By Sunny Kumar Aditya
Develop Android purposes with the most accepted database engines, SQLite
About This Book
- Develop database-driven Android purposes and remain sooner than the curve
- Explore the simplest ideas to exploit cursors and loaders to accomplish optimal results
- A step by step method of use SQLite for construction Android applications
Who This ebook Is For
This is a perfect publication for Android programmers who are looking to discover SQLite databases in accordance with Android functions. the final competency point anticipated of the reader is earlier wisdom of constructing functions and easy wisdom of Android and SQL.
SQLite is an open resource relational database administration approach. Android makes use of the SQLite database to shop and retrieve info repeatedly. the driver in the back of the platform is the database, allowing a myriad of selections for builders making state-of-the-art applications.
Android SQLite necessities specializes in the middle innovations at the back of development database-driven functions. This e-book covers the fundamental and complex themes with similar simplicity and aspect, so that it will let readers to speedy seize and enforce the strategies to construct an software database.
This ebook takes a hands-on, example-based method of aid readers comprehend the middle themes of SQLite and Android database-driven purposes. This ebook specializes in supplying you with latent in addition to common wisdom approximately practices and techniques in the direction of improvement in an simply comprehensible manner.
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Extra info for Android SQLite Essentials
An SQLite statement is written in SQL, which is issued to a database to retrieve data or to create, insert, update, or delete data in the database. A CREATE TABLE command describes the following attributes of the new table that is being created: The name of the new table. Tables may be generated in the main database, the temp database, or in any database attached. The name of each column in the table. The declared type of each column in the table. A default value or expression for each column in the table.
We will be covering other keywords in the subsequent chapters. The SQLite syntax SQLite follows a unique set of rules and guidelines called syntax. Hence, the SQL statements that we use for static systems can be used seamlessly here. Internally, SQLite stores data in five storage classes that can also be referred to as primitive datatypes: NULL: This represents a missing value from the database. At the time of processing in the memory, they are converted to the most general 8-byte signed integer form.
Insert(TABLE_CONTACTS, null, cv); } ... d("DATABASE", "count is : " + count); } } ... delete(TABLE_CONTACTS, whereClause, whereArgs); } ... put("COL_1", 1);, the column is COL_1 and the value being inserted for that column is 1. With this method, Android can buffer the results of the query in a productive manner; as it doesn’t need to load all of the data into memory. To obtain the elements of the resulting query, you can use the getCount() method. The isAfterLast() method permits you to analyze whether the end of the output has arrived.