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SQLite and PostgreSQL Serve Different Purposes Despite Similar SQL Syntax

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SQLite and PostgreSQL are both SQL databases but are architected in fundamentally different ways. SQLite is serverless, storing all data in a single file on disk with no setup needed, making it ideal for mobile apps, local development, and CLI tools. PostgreSQL operates as a dedicated client-server process, requiring network connections and offering advanced row-level locking to manage thousands of simultaneous users. While SQLite is fast and lightweight for single-user scenarios, it struggles under concurrent web traffic where multiple users write data at the same time. PostgreSQL is the preferred choice for live web applications that demand high concurrency and reliability.

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