Backend Queries

Parameterized statements are the primary defense against SQL injection. Use placeholders in your query and pass values separately—whether through an ORM like Prisma or raw SQL—so user input is never directly interpolated into the query string. This ensures data is treated as data, not executable code.

Eager loading and proper joins eliminate N+1 queries by fetching related data in a single query instead of executing separate queries in a loop. Most ORMs support eager-loading syntax; raw SQL requires explicit joins. Combine this with query optimization, indexing, and monitoring to identify bottlenecks.

Use limit and offset parameters to paginate results, WHERE clauses for filtering, and ORDER BY for sorting. Apply indexes on frequently filtered or sorted columns to maintain performance. Implement configurable timeouts and connection pooling to handle scale without degrading response times.

Yes. Prisma and raw SQL can coexist in the same codebase. Use Prisma's ORM for standard queries and leverage its `$queryRaw` or `$queryRawUnsafe` for complex queries. Always apply parameterized statements in raw SQL to maintain security across both approaches.

Input validation, proper indexing, transactions for data consistency, and query monitoring are essential complements to parameterized statements. Enforce connection pooling to prevent resource exhaustion, set configurable timeouts to block runaway queries, and validate all incoming data before querying the database.

Caching strategies—such as query result caching or application-level caching—reduce repeated database hits. Cache frequently accessed, relatively static data; invalidate strategically on updates. Combine with efficient data fetching patterns, pagination, and connection pooling to minimize database pressure while maintaining data freshness.