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Oracle Tutorials - PL/SQL Functions
(Continued from previous topic...)
What Is a Function?
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
-- Executable statements
-- Error handling statements
(Continued on next topic...)
- Is PL/SQL Language Case Sensitive?
- How To Enter Comments in PL/SQL?
- What Are the Types of PL/SQL Code Blocks?
- What Is an Anonymous Block?
- What Is a Named Program Unit?
- What Is a Procedure?
- What Is a Function?
- How To Declare a Local Variable?
- How To Initialize Variables with Default Values?
- How To Assign Values to Variables?
- What Are the Arithmetic Operations?
- What Are the Numeric Comparison Operations?
- What Are the Logical Operations?
- How Many Categories of Data Types?
- How Many Scalar Data Types Are Supported in PL/SQL?
- How To Convert Character Types to Numeric Types?
- What Are the Execution Control Statements?
- How To Use "IF" Statements on Multiple Conditions?
- How To Use "WHILE" Loop Statements?
- How To Use "FOR" Loop Statements?
- What Is NULL in PL/SQL?
- How To Test NULL Values?