
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Declaring a variable with only "type" is not sufficient. Every variable is distinguished by its data type and a set of additional characteristics. The question now is how to put this idea to work in order to convey the characteristics of any variable.
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