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external and internal mapping with examples
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
limitations and benefits in database tecknowlagy
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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
In the ER diagram, one example of subclassing is depicted following the Services entity. The subclasses Item Based and Time Based are created. The entity Services gains the attribu
CAR SALE (Car_id, Option_type, Option_listprice, Sale_date, Option_discountedprice) This relation refers to options installed in cars (e.g., cruise control) that were sold at a de
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
want a idea for final year project
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
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