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Learning SQLite for iOS

You're reading from   Learning SQLite for iOS Extend SQLite with mobile development skills to build great apps for iOS devices

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Product type Paperback
Published in Mar 2016
Publisher
ISBN-13 9781785288975
Length 154 pages
Edition 1st Edition
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Author (1):
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Gene Da Rocha Gene Da Rocha
Author Profile Icon Gene Da Rocha
Gene Da Rocha
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Table of Contents (10) Chapters Close

Preface 1. Introduction to SQL and SQLite FREE CHAPTER 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

SQL basics

SQLite also has some other features for using SQL, such as finding the greatest id from a column, and also the last insert and its id, as shown in the following:

SQL basics

Insert with a subselect clause

The INSERT statement is the one used to add data into the database. However, the example to date has only shown data from fixed information or program variables. There is another way to insert data, which comes from another table based on the select criteria and data/column matching. This is an insert with a subselect clause; see the following example:

SQLite> Insert into Salary values (Select id, name, salary from salary_import where name='Smith');

SQLite> Select * from Salary where name like '%smith%';

There are several variations available on the format, as shown in the preceding example. The SQL is flexible and there are options to select different data and offer computations on the last row of IDs.

Update with a subselect clause

As discussed in the previous chapters...

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