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Explain in detail about Collaboration Diagrams
Collaboration diagrams are interaction diagrams which emphasize structural organisation of an object that transmit and receive messages. There is always a path in collaboration diagrams which indicate how one object is linked to other and sequence numbers to show the time ordering of a message. The notation for depiction of a collaboration diagram is as:
Figure: Collaboration diagram
Why older data models are being replaced by new data modelling 100 words accepted#
Consider the subsequent relations along with keys underlined Street (name, location, city) House (number, street_name) Lives (name, house_number) Define the above relations
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The data of a view is not physically stored, but derived from one or more tables. True the data of a view is not physically stored
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explain normalization,and give the examples 1NF,2NF,3NF,BCNF.AND FUNCTIONAL DEPANDENACY AND DECOMPOSITION TECHNIQUES.
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