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Why do many production teams avoid NATURAL JOIN in their codebase?
Aa column rename or add silently changes the join condition
BNATURAL JOIN is not in the SQL standard
CNATURAL JOIN cannot be used with INNER semantics
DNATURAL JOIN requires explicit ON clauses, which is verbose
Answer & Solution
Correct answer: A. a column rename or add silently changes the join condition
NATURAL JOIN auto-matches on every column with the same name. A schema change upstream (a new shared column like 'created_at') will silently rewrite the join condition and may produce wrong results without any error. Explicit ON clauses are auditable and break loudly if they go stale.
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