PL/SQL Functions in Oracle

Q

What Is a Function in Oracle?

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A

A function is a named program unit. It consists of three parts:

  • Declaration Part - Defining the function name, calling parameters, return value type, local variables and local procedures. Declaration part is required.
  • Execution Part - Defining execution logic with executable statements. Execution part is required.
  • Exception Part - Defining error handling logics. Exception part is optional.

Here how a complete procedure should look like:

FUNCTION name (parameter_1, parameter_2) RETURN type AS
  -- Declaration statements
BEGIN
  -- Executable statements
  RETURN value;
EXCEPTION
  -- Error handling statements
END;

 

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