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Write a query to switch values in the Gender column (M to F and F to M).

SQLeasy0.3 min read

UPDATE employees SET gender = CASE gender WHEN 'M' THEN 'F' WHEN 'F' THEN 'M' ELSE gender END. For SELECT: SELECT id, name, CASE gender WHEN 'M' THEN 'F' WHEN 'F' THEN 'M' ELSE gender END AS gender FROM employees. **Why**: ELSE preserves NULL/other values....

🤖 Analyze Your Answer
Frequency
Low
Asked at 1 company
Category
487
questions in SQL
Difficulty Split
130E|271M|86H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Fossil Group

Why This Question Matters

This easy-level SQL question appears frequently in data engineering interviews at companies like Fossil Group. While less common, it tests deeper understanding that distinguishes strong candidates.

How to Approach This

Start by clearly defining the core concept being asked about. Interviewers want to see that you understand the fundamentals before diving into implementation details. Structure your answer with a definition, then explain the practical application with a concise example.

Expert Answer
60 words

UPDATE employees SET gender = CASE gender WHEN 'M' THEN 'F' WHEN 'F' THEN 'M' ELSE gender END. For SELECT: SELECT id, name, CASE gender WHEN 'M' THEN 'F' WHEN 'F' THEN 'M' ELSE gender END AS gender FROM employees. Why: ELSE preserves NULL/other values. Best practice: Handle NULL; audit logging for sensitive changes; immutable approach (new column) for compliance.

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According to DataEngPrep.tech, this is one of the most frequently asked SQL interview questions, reported at 1 company. DataEngPrep.tech maintains a curated database of 1,863+ real data engineering interview questions across 7 categories, verified by industry professionals.

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