Evaluate SQL expressions for zero

Q: How do I practice SQL interview questions?

PracHub provides an interactive SQL console where you can write and test queries against real database schemas. Get instant feedback and compare your solution with the expected output.

Q: What difficulty level is this coding question?

This is a medium difficulty Data Manipulation (SQL/Python) question, commonly asked during Take-home Project rounds at Akuna Capital.

Q: What role is this question designed for?

This question is commonly asked for Software Engineer candidates at Akuna Capital during technical interviews.

Question

Which of the following SQL expressions evaluate to 0? Evaluate each independently, justify the result, and note any dialect-specific behavior (e.g., MySQL type coercion rules):
1) SELECT '0' = 0;
2) SELECT 0 IS FALSE;
3) SELECT '0' IS FALSE;
4) SELECT STRCMP('0',
0). State your assumptions about the SQL dialect.

PracHub · Accepted Answer

This question evaluates understanding of SQL type coercion, boolean semantics, comparison operators, and dialect-specific evaluation behavior (for example, MySQL), focusing on interpreting expressions that may evaluate to zero.

Quick Overview

Evaluate SQL expressions for zero