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Learning SQLite for iOS

You're reading from  Learning SQLite for iOS

Product type Book
Published in Mar 2016
Publisher
ISBN-13 9781785288975
Pages 154 pages
Edition 1st Edition
Languages
Author (1):
Gene Da Rocha Gene Da Rocha
Profile icon Gene Da Rocha
Toc

Table of Contents (15) Chapters close

Learning SQLite for iOS
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
1. Introduction to SQL and SQLite 2. Database Design Concepts 3. Administering the Database 4. Essentials of SQL 5. Exposing the C API 6. Using Swift with iOS and SQLite 7. iOS Development with PhoneGap and HTML5 8. More Features and Advances in SQLite Index

Query plan


When a query is to be executed, a query plan is used by the database to forge a data path where the best and the most efficient types of routes are created. If there are table join, indexes, and a number of rows in the tables, a variety of mathematical calculations using different algorithms are prepared. Having an execution plan is useful when there are issues with SQL, and to debug multiple table joins and index setups, and follow a path to solve a data or programming issue.

Apart from the straightforward SQL statements in a plain format, there will be those statements that will be used within iOS and wrapped in one of the languages such as Objective-C or Swift.

When the query execution plan is executed, the data, the information, is geared for debugging only and should be used as guidance. Every SQLite release will have different updates that affect the product. The whole idea of a plan is to outline the strategy path an SQL command takes.

A keyword called EXPLAIN, or a phrase...

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