Evaluate SQL expressions for zero
Company: Akuna Capital
Role: Software Engineer
Category: Data Manipulation (SQL/Python)
Difficulty: Medium
Interview Round: Take-home Project
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.
Quick 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.