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(a) Provide the description of the following ODMG schema in the Object Definition Language (ODL).
(b) Based on the above object database, write the following queries in the Object Query language (OQL):
Explain the conventions (relationships) for displaying an ER schema as an ER diagram.
All edges of a cube are expanding at a rate of 6 centimeters per second. How fast is the surface area changing when each edge is (a) 2 centimeters and (b) 10 centimeters?
What are wait-for-graphs?Give the algorithm to construct a wait-for-graph from a given schedule of transactions? How can deadlocks be detected from wait-for-graphs? Ans: The
What are the properties of transaction? There are three properties of transactions :- A) Atomicity B) Consistency C) Isolation
Ask q“A database will be made to store information about patients in a hospital. On arrival, each patient’s personal details (name, address, and telephone number) are recorded wher
find the name of supplier who supply some red part
What is inheritance? Inheritance is an object orientation concept that allows reusability of code / design. Basic sense of inheritance is that if one class is predefined than a
sql is relationally complete-justify
How many types of Views are there? There are Four types of views:- Database View Help View Projection View Maintenance View
Explain in details about Data Sharing
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