A function is a database object that returns a single value.
It is similar to a stored procedure but must return a result.
Functions are mainly used for calculations.
Functions can accept input parameters.
They always return one value.
Functions can be used inside SELECT statements.
Functions are commonly used for reusable calculations.
They simplify complex expressions.
Functions improve query readability.
The CREATE FUNCTION command is used to define a function.
RETURN keyword specifies the output value.
Functions must return a result.
Functions are widely used in calculations and reports.
They are executed within SQL statements.
Understanding functions is essential for advanced SQL development.