Object query language and odmg schema , Database Management System

Assignment Help:

(a) Provide the description of the following ODMG schema in the Object Definition Language (ODL).

1178_data base table.png

(b) Based on the above object database, write the following queries in the Object Query language (OQL):

List the addresses of employees who work in a given department.
List the departments with the number of employees who work in those departments:
List the articles located at more than one department and their prices in each department.

Related Discussions:- Object query language and odmg schema

Transaction, what is cascading rollback

what is cascading rollback

Benefits and drawbacks of sequential file organisation, Benefits of Sequent...

Benefits of Sequential File Organisation It is quick and efficient when dealing with huge volumes of data that require being processed periodically (batch system). Dra

Increased parallelism-data replication, Increased parallelism : Since the r...

Increased parallelism : Since the replicated date has several copies a query can be distributed or can be answered from the smallest loaded site. Also, with more replicas you have

Explain trivial dependency, Explain trivial dependency? Functional depe...

Explain trivial dependency? Functional dependency of the form α ->β. is trivial if α C β. Trivial functional dependencies are satisfied by all the relations.

State the functional approach of object oriented methods, State the functio...

State the functional approach of object oriented methods Moving from a functional approach to an object oriented one needs a translation of functional model elements into objec

Give some encryption techniques, Give some encryption techniques? A) D...

Give some encryption techniques? A) DES B) AES C) Public key encryption

Forward recovery (redo), Forward Recovery (Redo): In this system the commit...

Forward Recovery (Redo): In this system the committed changes made by a transaction are reapplied to a previous copy of the database. In simpler

How does query tree represent relational algebra expression, How does a que...

How does a query tree represent a relational algebra expression? Discuss any three rules for query optimisation, giving example as to when should each rule be applied. Ans

Goals, what are the purposes of dbms in details

what are the purposes of dbms in details

Define an operator that a relational algebra does not have, Define an opera...

Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.

Write Your Message!

Name

Email id

Message

Verfication Code

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

User Account

All Pages