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What are three components of the schema architecture proposed by ANSI/SPARC?
The three component schema architecture proposed by ANSI/SPARC is as given below:
External schema: An external view is abstract representation of some portion of total database.
Conceptual schema: A conceptual view is the logical representation of the database in its entity.
Internal schema: The internal schema is database as it is physically stored.
Create a new user : CREATE USER IDENTIFIED BY Example: //CREATE USER MCA12 IDENTIFIED BY W123 Grant: It is used to give database access permission to users. It is of
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Use inheritance as an implementation technique when you are going to use inheritance as an implementation technique, you can achieve same goal in a safer way by making one cla
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What is Interaction Diagram An interaction diagram shows an interaction, comprises of a set of objects and their relationships including the messages that may be dispatched be
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