Microsoft SQL Server Development for Everyone - Scalar Valued Functions

The video tutorial covers SQL functions, focusing on scalar valued functions. It begins with an introduction to SQL functions, including aggregate functions like MAX and MIN. The tutorial then explores date and time functions, such as GETDATE and YEAR, and system functions available in SQL. The main focus is on creating scalar valued functions, with a step-by-step guide on defining, testing, and modifying these functions. The tutorial concludes with practical examples and encourages viewers to practice creating their own functions.

What is the primary purpose of using functions in SQL?

• To replace SQL queries

• To store data permanently

• To execute complex code with simple commands

• To create databases

Which function in SQL does not require any parameters?

• MAX

• MIN

• GETDATE

• SUM

What type of value does the GETDATE function return?

• String

• Integer

• Float

• DateTime

Where can you find a list of system functions in SQL?

• In the database's tables

• In the programmability folder

• In the SQL server logs

• In the user settings

What is the first step in creating a scalar valued function?

• Create the function template

• Write the SQL query

• Define the return type

• Add parameters

What is the purpose of declaring a variable in a scalar valued function?

• To hold the return value temporarily

• To define the function's parameters

• To execute the SQL query

• To store the function's name

What parameter type is used to retrieve a course title by ID?

• Float

• String

• DateTime

• Integer

Why is it important to match the return variable type with the function's return type?

• To ensure the function executes faster

• To prevent data truncation

• To allow multiple return values

• To simplify the SQL query

What should you do if a function needs modification after creation?

• Use the ALTER command

• Delete and recreate the function

• Change the database settings

• Restart the SQL server

What happens if you pass an invalid ID to the course title function?

• It returns a null value

• It crashes the SQL server

• It returns an error

• It returns the first course title