The SQLAlchemy 2.0 Textbook (DB-Agnostic) on Manvendra Rajpoot https://blog.rajpoot.dev/textbooks/sqlalchemy/ Recent content in The SQLAlchemy 2.0 Textbook (DB-Agnostic) on Manvendra Rajpoot Manvendra Rajpoot https://blog.rajpoot.dev/img/personal/cover.png https://blog.rajpoot.dev/img/personal/cover.png Hugo en Manvendra Rajpoot SQLAlchemy 2.0 Textbook Ch. 1 — Introduction, Core vs ORM, and the 2.0 Mental Model https://blog.rajpoot.dev/textbooks/sqlalchemy/01-introduction-core-vs-orm/ Thu, 07 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/01-introduction-core-vs-orm/ Chapter 1 — SQLAlchemy 2.0 fundamentals: the unified Core/ORM API, engine, connection, the 2.0 style query. SQLAlchemy 2.0 Textbook Ch. 2 — Engine, Pooling, and Connections https://blog.rajpoot.dev/textbooks/sqlalchemy/02-engine-pooling-connections/ Thu, 07 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/02-engine-pooling-connections/ Chapter 2 — SQLAlchemy engine internals: pooling strategies, connection lifecycle, events, dialects. SQLAlchemy 2.0 Textbook Ch. 3 — Schema and the Type System https://blog.rajpoot.dev/textbooks/sqlalchemy/03-schema-and-types/ Thu, 07 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/03-schema-and-types/ Chapter 3 — SQLAlchemy schema definition: Mapped, mapped_column, types, defaults, indexes, constraints. SQLAlchemy 2.0 Textbook Ch. 4 — The Session and the Unit of Work https://blog.rajpoot.dev/textbooks/sqlalchemy/04-session-and-unit-of-work/ Thu, 07 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/04-session-and-unit-of-work/ Chapter 4 — Sessions in SQLAlchemy 2.0: lifecycle, identity map, flush vs commit, expire, and the unit of work pattern. SQLAlchemy 2.0 Textbook Ch. 5 — Querying with select() https://blog.rajpoot.dev/textbooks/sqlalchemy/05-querying-with-select/ Thu, 07 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/05-querying-with-select/ Chapter 5 — Querying SQLAlchemy: select(), filtering, joins, aggregations, subqueries, CTEs, and the result API. SQLAlchemy 2.0 Textbook Ch. 6 — Relationships and Loading Strategies https://blog.rajpoot.dev/textbooks/sqlalchemy/06-relationships/ Thu, 07 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/06-relationships/ Chapter 6 — Relationships in SQLAlchemy 2.0: one-to-many, many-to-many, lazy / eager loading, joinedload, selectinload. SQLAlchemy 2.0 Textbook Ch. 7 — Transactions and Concurrency https://blog.rajpoot.dev/textbooks/sqlalchemy/07-transactions-concurrency/ Thu, 07 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/07-transactions-concurrency/ Chapter 7 — Transactions and concurrency in SQLAlchemy: isolation levels, savepoints, with_for_update, optimistic locking, deadlock retry. SQLAlchemy 2.0 Textbook Ch. 8 — Async SQLAlchemy in Depth https://blog.rajpoot.dev/textbooks/sqlalchemy/08-async-deep-dive/ Thu, 07 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/08-async-deep-dive/ Chapter 8 — Async SQLAlchemy 2.0: AsyncEngine, AsyncSession, async streaming, lazy loading caveats, and FastAPI integration. SQLAlchemy 2.0 Textbook Ch. 9 — Performance: N+1, Bulk Ops, Streaming https://blog.rajpoot.dev/textbooks/sqlalchemy/09-performance/ Thu, 07 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/09-performance/ Chapter 9 — SQLAlchemy performance: N+1 prevention, bulk inserts, streaming, indexes, query analysis. SQLAlchemy 2.0 Textbook Ch. 10 — Migrations and Schema Evolution https://blog.rajpoot.dev/textbooks/sqlalchemy/10-migrations/ Thu, 07 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/10-migrations/ Chapter 10 — Schema migrations with SQLAlchemy and Alembic: integration patterns, autogenerate, branching, online schema changes. SQLAlchemy 2.0 Textbook Ch. 11 — Testing https://blog.rajpoot.dev/textbooks/sqlalchemy/11-testing/ Thu, 07 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/11-testing/ Chapter 11 — Testing SQLAlchemy: per-test transactions, testcontainers, factories, and async test fixtures. SQLAlchemy 2.0 Textbook Ch. 12 — Production Patterns https://blog.rajpoot.dev/textbooks/sqlalchemy/12-production-patterns/ Thu, 07 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/12-production-patterns/ Chapter 12 — Production SQLAlchemy: connection pooling, read replicas, observability, multi-tenancy, and operational patterns.