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Attributes having a one value for a particular entity.
For instance, Age is a single valued attribute of a student entity.
Attributes that have more than single values for a specific entity is known as a multivalued attribute. Different entities may have dissimilar number of values for these types of attributes. For multivalued attributes we can also states the minimum and maximum number of vales that can be attached. For instance, phone number for a person entity is a multivalued attribute.
what do you understand by enhanced entity-relationship
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Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
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Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
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Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
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