SQL · interview question
A bug appears around indexes and access patterns. What is the strongest first debugging move?
Multiple choiceHardchapter-11-curatedpremiumsqlindexes-and-access-patterns
CREATE INDEX idx_orders_customer_id ON orders(customer_id);Answer and explanation
Correct answer
B. Trace one concrete example, inspect the state transitions, and compare them to the intended rule before rewriting anything.
Why
That approach is reliable because it creates evidence. Random indexing can add write cost without helping the queries that matter.
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