3 articles tagged databases. See all tags or all posts.
Why we never expose a database directly — how to layer FastAPI, Keycloak, and PostgreSQL for clean access control, testable endpoints, and a stable client interface.
Relational algebra cannot express recursive queries — here is why transitive closure is outside the algebra's scope, and what SQL's WITH RECURSIVE actually means.
Why relational databases exist — a teaching practicum that makes students feel the pain of querying 120 CSV files with shell tools before showing them SQL. Imperative vs. declarative, made concrete.
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