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QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
What is Asterisk in SQL? Asterisk (*): In SQL, the columns for all the tables and views in the FROM clause will be displayed.
Explain Instance and schemas? Instances and schemas: Databases changes over time as the information is deleted and inserted. The collection of information stored in database
what is check point in database management system
What is vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
List the table modification commands in SQL? A) Deletion B) Updates C) Insertion D) Update of a view
Question: Consider the following database relations for a textbook ordering system used by a college bookshop: Book (b-copy#, bname, ISBN#, author, price, subject) Order (s#
example of bank
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