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Learning SQLite for iOS

By : Gene Da Rocha

3 (4)

Learning SQLite for iOS

3 (4)

By: Gene Da Rocha

Overview of this book

The ability to use SQLite with iOS provides a great opportunity to build amazing apps. Apple's iOS SDK provides native support for SQLite databases. This combination offers the potential to create powerful, data-persistent applications. This book starts with the architecture of SQLite database and introduces you to concepts in SQL . You will find yourself equipped to design your own database system, administer it, and maintain it. Further, you will learn how to operate your SQLite databases smoothly using SQL commands. You will be able to extend the functionality of SQLite by using its vast arsenal of C API calls to build some interesting, exciting, new, and intelligent data-driven applications. Understand how Xcode, HTML5, and Phonegap can be used to build a cross-platform modern app which can benefit from all these technologies - all through creating a complete, customizable application skeleton that you can build on for your own apps.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Introduction to SQL and SQLite

1. Introduction to SQL and SQLite

About SQL

Where does SQLite stand in today's industry?

iOS with SQLite

Embedded databases

The architecture of the SQLite database

Features

The advantages of using SQLite

Working with SQLite

The examples of using SQLite with iOS

Summary

2. Database Design Concepts

2. Database Design Concepts

Database essentials

Reasons for using SQLite

Database connections

Preparing queries

Parameterized SQL

Error handling

Queries within the db.exec statement

SQL injection attacks

Creating user-defined functions

Transactions and locks

Transactions – reading/writing

Designing for SQLite

Summary

3. Administering the Database

3. Administering the Database

Creating a database

Viewing database schema data

Backing up the database

Database tools

Database file information

Summary

4. Essentials of SQL

4. Essentials of SQL

Transactions

Query plan

SQL basics

Data integrity

Default values

Updating Views

Index use

Triggers

Synchronous writes

Database locking and deadlocks

FMDB SQLite wrapper

Database creation and opening

SQL in iOS

Summary

5. Exposing the C API

5. Exposing the C API

SQLite C components' functionality

Summary

6. Using Swift with iOS and SQLite

6. Using Swift with iOS and SQLite

Basic requirements

Starting an Xcode Project with Swift

Using the SQLite 3 Library

Summary

7. iOS Development with PhoneGap and HTML5

7. iOS Development with PhoneGap and HTML5

HTML5 and PhoneGap development

An HTML5 framework

Hybrid applications

An Xcode project with PhoneGap, HTML5, and Swift

Summary

8. More Features and Advances in SQLite

8. More Features and Advances in SQLite

PhoneGap plugins

Extensions to the C API

Write Ahead Logging with SQLite

The B-tree usage with SQLite

Creating a simple Swift

Summary

Index

Index

Viewing database schema data

SQLite offers several commands as part of a command set to get information about the contents of a database. For example, to get a list of tables, use the .table command. To find a specific table name, use a % symbol and text as a pattern to find the result, for example, .tables [pattern], as shown in the following screenshot. By issuing the .tables command and appending a %te% text to it, is a request to SQLite to list all its tables within the database that has the word te (in our case temp) in their name which are displayed correctly:

Viewing database schema data

Index data

Prior to the following example, a temp_idx index has been created, to get a list of indexes for the temp table, at the sqlite3 prompt .indices temp, which is actually the .indices command followed by the table name, as shown here:

Index data

By using the preceding command, the temp table's index can be seen.

Schema data

To view the schema of the database, the following command can be issued, .schema, but type the .schema &lt...

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Tech Concepts

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Programming languages

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