SQL · interview question
A bug appears around schema thinking. What is the strongest first debugging move?
Multiple choiceEasychapter-11-curatedpremiumsqlschema-thinking
CREATE TABLE orders (
id TEXT PRIMARY KEY,
customer_id TEXT NOT NULL,
subtotal_cents INTEGER NOT NULL
);Answer and explanation
Correct answer
A. 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. Weak schema design pushes ambiguity into every query and every data repair later.
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