Dev Tools · 1h ago
SQL Interview Trap: Why 'Second Highest Salary' Is Harder Than It Looks
A developer breaks down the classic 'second highest salary' SQL problem, highlighting pitfalls like ties and null handling. The article argues that analysts must clarify business requirements before writing code. It recommends window functions over subqueries for robust solutions.
Meridian48 take
This is a solid reminder that even basic SQL queries can fail in production if you ignore edge cases—a lesson every data engineer learns the hard way.
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Data Analysis SQL: Asking the right questions and using the right tools →
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