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The declaration of a package has two parts
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package specification - contains the declarations of procedures (and functions), variables, constants, and exceptions that are accessible outside the package
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package body: defines procedures (and functions), cursors, and exceptions that are declared in the package specification.
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It also defines those PL/SQL program units and constructs (procedures, variables etc) that are only local to the package body
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The package specification is created by CREATE PACKAGE command
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The package body is created by CREATE PACKAGE BODY command
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