🎁 New User? Get 20% off your first purchase with code NEWUSER20 · ⚡ Instant download · 🔒 Secure checkout Register Now →
Menu

Categories

Python Intermediate

What is SQLAlchemy?

The most popular Python SQL toolkit and ORM that provides a full suite of database abstraction patterns.

SQLAlchemy offers two usage patterns: Core (SQL expression language for explicit queries) and ORM (object-relational mapping for model-based access). It supports PostgreSQL, MySQL, SQLite, Oracle, and more.

Key features include connection pooling, lazy loading, eager loading, unit of work pattern, migrations (via Alembic), and complex query building. SQLAlchemy 2.0 introduced a modernized API with better type checking support.

Related Terms

Python Typing Module
A standard library module providing type hints for function signatures and variables, enabling static analysis without runtime enforcement.
Python Interpreter
The program that reads and executes Python code, translating it into machine instructions at runtime.
GIL (Global Interpreter Lock)
A mutex in CPython that allows only one thread to execute Python bytecode at a time, limiting true parallelism.
Python Profiling
Measuring where Python code spends time and memory to identify performance bottlenecks and optimization opportunities.
Magic Methods
Special double-underscore methods that define how Python objects behave with built-in operations and functions.
Slots
A class mechanism that restricts attribute creation and reduces memory usage by using a fixed set of instance variables.
 View All Python Terms →