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Notes:
View – A view is a logical and alternate representation of one or more underlying tables (or views).
Sequence – An Oracle sequence is an object that produces numbers. It is often used as a primary key generator.
Synonym – A synonym is an alternate name for an object. Often used to eliminate the need for a schema name. For example, rather than user GEOFF querying “DAVE.CUSTOMER”, user GEOFF can, after creating a synonym, query “CUSTOMER”.