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Write short notes on tuple relational calculus.
The tuple relational calculation is anon procedural query language. It defines the desired information without giving a particular procedure for obtaining that information.
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
We require an advanced system for a Sports Centre, you are concerned only with representing the data discussed below about bookings and members. (The complete system may contain ot
Preliminary entities and attributes of human resourse management database management system
Define functional and multivalued dependencies. Ans: A functional dependency is a assets of the semantics of the attributes in a relation. The semantics point out how at
Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people
Consider the relations given below Borrower (id_no, name) Book (accno., title, author, borrower_idno) (a) Define the above relations as tables in SQL forming real world assumptio
real life situations where database management system are most suitable
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
Implementing software control To implement software control designer must redesign strategy of state event model which is present in dynamic model. There are three basic ap
State the definition of association An association is a structural relationship which specifies that objects of one thing are connected with objects of another. In UML, asso
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