679. Replace missing status — function task 2

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Write the MySQL query using appropriate string/date/NULL functions.
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Questions & Answers

Answer & Explanation

4 Answers
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Option A

Compare NULL using = NULL.
Additional Explanation
This option is incorrect for the stated requirement.
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Editorial Answer 1
Verified Correct Answer

Option B

SELECT id,COALESCE(status,'pending') AS status FROM orders;
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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Editorial Answer 2
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Option C

Use string concatenation without handling NULL values.
Additional Explanation
This option is incorrect for the stated requirement.
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Editorial Answer 3
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Option D

Use DELETE for the transformation.
Additional Explanation
This option is incorrect for the stated requirement.
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Editorial Answer 4