**Yes.** CASE in SET for conditional update. Include ELSE to avoid unintended NULLs. UPDATE employees SET salary = CASE WHEN perf = 'excellent' THEN salary * 1.1 WHEN perf = 'good' THEN salary * 1.05 ELSE salary END WHERE dept_id = 10;
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.
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.
Yes. CASE in SET for conditional update. Include ELSE to avoid unintended NULLs.
UPDATE employees
SET salary = CASE
WHEN perf = 'excellent' THEN salary * 1.1
WHEN perf = 'good' THEN salary * 1.05
ELSE salary
END
WHERE dept_id = 10;
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Analyze My Answer — FreeAccording 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.