What is the difference between an SQLCommand and a Stored Procedure?

Short answer: SQLCommand: A SQL command is a string of SQL code (like SELECT, INSERT, etc.) that is executed directly against the database. Stored Procedure: A precompiled collection of SQL statements that can be executed as a unit. It can contain more complex logic, including control-of-flow and error handling.

Example code

SQL Command: SELECT * FROM Customers; Stored Procedure: EXEC GetCustomerDetails;

Real-world example (ShopNest)

Always pass order ids with parameters: cmd.Parameters.AddWithValue("@id", orderId). Never concatenate user input into SQL.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.