What are 'Stored Procedures' in SQL and what benefits do they offer?
Instruction: Define stored procedures and explain their advantages in database management.
Updated
Official answer
A stored procedure is a database routine that packages operations behind a callable interface. Its language, parameters, transaction rules and error handling depend on the database engine.
Possible benefits include reusing logic, reducing application/database round trips and presenting a controlled operation to callers. Appropriate privileges can let callers execute a procedure without granting every underlying table permission, but that depends on the engine and the procedure's execution context.
A procedure is not automatically faster, precompiled once forever or safe from injection. Plans may be cached, compiled or recompiled under engine-specific rules. Dynamic SQL still requires safe parameter handling and input validation. Elevated execution privileges can widen the impact of a mistake.
Keep the interface small and versioned, propagate failures clearly, define transaction ownership and test permissions as the actual caller. Evaluate plans and latency on representative workloads. Also consider the maintenance cost of distributing logic between application and database code, deployment coordination and reduced portability.
Assessment: Describe an appropriate use case and its costs. Do not present SQL Server TRY...CATCH syntax or one product's plan caching as universal SQL behavior.