Answer
Prepared statements compile SQL once and reuse execution plans, improving speed and preventing SQL injection.
Quick Answer
Prepared statements parse and plan a SQL query once, then execute multiple times with different parameters. PREPARE stmt AS SELECT * FROM users WHERE id = $1; EXECUTE stmt(42). Benefits: plan reuse (faster for repeated queries), protection against SQL injection (parameters are separate from query). In application code, most drivers use prepared statements automatically (parameterized queries).
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ