This article provides a comprehensive analysis of SQLite database file formats, focusing on B+ tree, B-tree, and other structural elements. It is particularly suitable for professionals engaged in data mining, data parsing, and data recovery. The analysis covers key components of SQLite's database file format, such as the page structure, leaf and internal nodes, and how the B+ tree is utilized for indexing and data retrieval. Additionally, the discussion includes how these structures can be leveraged for efficient data operations and how they impact performance in real-world applications.