What Is a Named Program Unit

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What Is a Named Program Unit? - Oracle DBA FAQ - Understanding PL/SQL Language Basics

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A

A named program unit is a PL/SQL code block with an name. It consists of three parts:

Declaration Part - Defining the program unit name, calling parameters, 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.

There are two types of named program units:

Procedure - Has no return values.
Function - Has a return value.

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