**Simple:** CASE col WHEN v1 THEN r1 ... **Searched:** CASE WHEN cond1 THEN r1 WHEN cond2 THEN r2 ELSE r3 END. Use in SELECT, WHERE, ORDER BY, GROUP BY. SELECT name, CASE WHEN score>=90 THEN 'A' WHEN score>=80 THEN 'B' ELSE 'C' END AS grade FROM students;
This easy-level SQL question appears frequently in data engineering interviews at companies like LTIMindtree. While less common, it tests deeper understanding that distinguishes strong candidates. Mastering the underlying concepts (sql) will help you answer variations of this question confidently.
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.
Simple: CASE col WHEN v1 THEN r1 ... Searched: CASE WHEN cond1 THEN r1 WHEN cond2 THEN r2 ELSE r3 END. Use in SELECT, WHERE, ORDER BY, GROUP BY.
SELECT name, CASE WHEN score>=90 THEN 'A' WHEN score>=80 THEN 'B' ELSE 'C' END AS grade FROM students;
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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.