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Class Diagram
A class diagram is required to support functional necessity of system. In a static design view, class diagram is used to model vocabulary of the system, simple collaboration and logical schema. It consists of sets of classes, interfaces, collaborations, dependency and generalization and association relationship. The notation for classes and the relationship among classes is shown as:
Figure: Relationship among classes
what is Mapping Constraints? with examples
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Example RELATION SCHEMA for STUDENT: STUDENT (Roll No: string, name: string, login: string, age: integer) RELATION INSTANCE
Define Database layer? The database layer defines the data formats used in the database.
My cut off date is very soon in a Database subject and i dont know how to solve anything in it
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