SQLite - SQL

Introduction

SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world, used in many popular software applications such as Firefox, Skype, and Adobe products. SQLite is a powerful tool for data storage and management, and its small size and ease of use make it an ideal choice for embedded systems, mobile devices, and web applications.

Features

SQLite has many features that make it popular among developers:

• Self-contained: SQLite is a library and operates only within the application that uses it, making it perfect for embedded systems.

• Serverless: There is no need for a separate server process that maintains the database, making it easy to set up and use.

• Zero-configuration: No installation or setup is required, making it very easy to use.

• Transactional: All transactions are fully atomic, consistent, isolated, and durable.

• Small size: It is a lightweight library that occupies only a few MB's of disk space.

• Cross-platform: SQLite works on various platforms, including Windows, Linux, macOS, iOS, Android and many more.

• Standard-compliant: It follows the SQL-92 standard, making it easy to use for developers.

Code Examples

SQLite can be used with various programming languages such as Python, Java, C++, C# and many more. Here's an example of how SQLite can be used in Python:

import sqlite3

conn = sqlite3.connect('example.db')
c = conn.cursor()

# Create table
c.execute('''CREATE TABLE stocks
             (date text, trans text, symbol text, qty real, price real)''')

# Insert a row of data
c.execute("INSERT INTO stocks VALUES ('2006-01-05','BUY','RHAT',100,35.14)")

# Save (commit) the changes
conn.commit()

# Close the connection
conn.close()

Here we made a connection to the database, created a table 'stocks' and inserted a row of data. We then committed the changes and closed the connection.

Conclusion

SQLite is an excellent choice for developers who need a lightweight, no-fuss database engine that can be easily integrated into their application. Its transactional nature, standard compliance, and cross-platform compatibility make it an ideal tool for data storage and management. With SQLite, developers can focus on building their application while it takes care of the data storage and management.