advanced~4h
Advanced SQL — Stored Procedures, Functions, Triggers & Sequences
Functions, procedures, triggers, and sequences let you push logic and guarantees into the database itself, so they hold true no matter which application or code path touches the data.
Learning objectives
- Explain the structural difference between a function and a stored procedure, and why only one of them can manage its own transaction.
- Describe exactly when a BEFORE trigger's return value matters versus an AFTER trigger's.
- Explain why sequences guarantee uniqueness but not gaplessness, and why that tradeoff is unavoidable under concurrency.
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Advanced SQL — Stored Procedures, Functions, Triggers & Sequences