SQL Lite 1.26

SQLite is a relational database management system that is embedded in devices and applications. It is a self-contained, serverless, zero-configuration, and transactional database engine.

SQLite provides APIs for various programming languages including Python, Java, C/C++, C#, Ruby, PHP, and many more.

You can create a new SQLite database by using the `sqlite3` command line tool or through programming interfaces like Python's `sqlite3` module.

Some key features of SQLite include full ACID compliance, small footprint, single-file storage, support for common SQL syntax, high performance, and multi-platform compatibility.

SQLite allows concurrent read access from multiple applications, but only one can write at a time. However, multiple threads within a single application can write concurrently.

To perform data backup and restore operations in SQLite, you can either manually copy the database file or use the SQLite Online Backup API provided by certain programming languages.

SQLite databases have a maximum size limit of approximately 140 terabytes (TB), but some operating systems may impose additional file size limits.

By default, SQLite does not provide encryption or security features. However, you can use third-party extensions or libraries to add encryption, secure access, or other security capabilities.

SQLite is more commonly used in embedded systems and mobile apps, but it can also handle smaller-scale enterprise applications. However, for heavy concurrent write operations or large datasets, other database systems may be more appropriate.

To optimize SQLite query performance, you can index columns frequently used in search conditions, use appropriate joins, avoid unnecessary calculations or conversions, and batch multiple operations when possible.