Calling Stored Procedures
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Calling Stored Procedures
Calling stored procedures means executing pre-defined SQL procedures stored in the database. This helps reuse logic and improve performance by avoiding repeated queries.
Syntax
EXEC procedure_name;
EXEC procedure_name parameter1, parameter2;📝 Edit Code
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What is Calling a Stored Procedure?
- 1Executing a saved SQL procedure.
- 2Uses EXEC or CALL command.
- 3Runs precompiled SQL logic.
- 4Improves performance.
How to Call a Procedure
- 1Use EXEC in SQL Server.
- 2Use CALL in MySQL.
- 3Provide required parameters.
- 4Receive result sets if any.
Calling with Parameters
- 1Pass values during execution.
- 2Example: EXEC GetEmployeeById 101.
- 3Enables dynamic queries.
- 4Improves flexibility.
Benefits of Calling Procedures
- 1Faster execution.
- 2Reusability of logic.
- 3Reduced SQL repetition.
- 4Better performance.
Common Use Cases
- 1Payroll processing.
- 2Report generation.
- 3Data retrieval.
- 4Batch jobs.
Best Practices
- 1Use correct syntax for DB type.
- 2Validate input parameters.
- 3Avoid unnecessary procedure calls.
- 4Handle returned data properly.
Real-world
- 1Fetching employee details quickly.
- 2Generating payroll reports.
- 3Retrieving order information.
- 4Running batch processing tasks.
- 5Executing business logic in database.
Common Mistakes
- 1Forgetting required parameters.
- 2Using wrong execution syntax.
- 3Calling non-existing procedures.
- 4Not handling output results properly.
Best Practices
- 1Always verify procedure exists.
- 2Pass correct parameters.
- 3Use consistent naming conventions.
- 4Handle results properly in application.
Quick Summary
- Stored procedures are executed using EXEC or CALL.
- They can accept parameters.
- Improve performance and reuse logic.
- Used for database-level operations.
- Common in enterprise systems.
Interview Questions
Q1. How do you call a stored procedure?
Answer: Using EXEC (SQL Server) or CALL (MySQL).
Q2. Can we pass parameters while calling procedures?
Answer: Yes, parameters can be passed during execution.
Q3. What is the purpose of calling procedures?
Answer: To execute predefined SQL logic.
Q4. What happens when a procedure is called?
Answer: The stored SQL logic is executed on the database server.
Q5. Do all databases use EXEC?
Answer: No, MySQL uses CALL instead of EXEC.
Quiz
Which command is used to execute a stored procedure in SQL Server?