62. Auto increment (Scenario 2)

DBMS Published 30 Sept 2026 Updated 30 Sept 2026 0 Views Verified

Create an integer surrogate key that increments automatically in MySQL.

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Answer & Explanation

4 Answers

Verified Correct Answer

Option A

CREATE TABLE products (id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY, name VARCHAR(255) NOT NULL);

Additional Explanation

Correct implementation. Prefer parameterized queries in application code, validate affected rows for UPDATE/DELETE, and use transactions for related writes.

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Option B

Use a SELECT without a constraint.

Additional Explanation

This option is incorrect for the stated requirement.

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Option C

Use a CHECK for the same relationship.

Additional Explanation

This option is incorrect for the stated requirement.

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Option D

Use a DELETE statement instead.

Additional Explanation

This option is incorrect for the stated requirement.