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Define query optimization. Query optimization refers to the process of search the lowest -cost method of evaluating a given query.
Project Description: I would like to get a database of a website which has clients email name and phone number. If you are able to get information from a website, by entering
usecase diagram,activity diagraM,SEQUENCE DIAGRAM
Explain the Role of a database administrator a. Defining the Schema The DBA describes the schema which consists of the structure of the data in the application. The DBA
Which database level is closest to the users? External database level is closest to the users.
Differentiate sub-class and super-class? The specialization of a class is known as subclasses.eg: employee is a subclass of person and teller is a subclass of employee. Convers
MOSS VALE is a town with 15000 inhabitants. The fire department wishes to develop a system that automates the despatch of fire engines to attend fires. The ERD below describes the
design a generalization specialization hierarchy for a motor vehicle sales company. the company sells motorcycles, passenger cars, vens and buses.
What is the role of ORDER By Clause? ORDER BY clause: The ORDER BY clause permits you to sort the records in your result set. The ORDER BY clause can just be used in select s
It is mandatory that for every table in the LDB hierarchy there should exist one GET statement in the report. False. It is not essential.
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