Basic QueriesBeginner
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sqlWhat is SQLite and how does its serverless architecture work?
Explanation & Concept
SQLite is a self-contained, serverless, zero-configuration, transactional SQL database engine. Unlike client-server databases like PostgreSQL or MySQL that run as independent background daemons listening on network ports, SQLite is an embedded library linked directly into the host application.
The entire database (tables, indexes, schema, and data) is stored in a single cross-platform disk file.
Code Example
sql
-- SQLite standard query syntax
CREATE TABLE tasks (
id INTEGER PRIMARY KEY AUTOINCREMENT,
title TEXT NOT NULL,
is_done INTEGER DEFAULT 0 CHECK(is_done IN (0, 1)),
created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);
INSERT INTO tasks (title) VALUES ('Prepare product launch');
SELECT * FROM tasks WHERE is_done = 0;How It Works & Key Takeaways
Because SQLite runs within the application's process memory, there is zero network overhead, making small reads and writes extraordinarily fast.
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