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What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
A database to track your progress in your college program will track your progress towards graduation! A database that has information containing the classes that you have taken, c
Define upgrade and downgrade? It gives a mechanism for conversion from shared lock to exclusive lock is called as upgrade. It gives a mechanism for conversion from exclusive
Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pictori
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
What are partial, alternate,, artificial, compound and natural key? Partial Key: It is a set of attributes that can uniquely recognize weak entities and that are related to s
Objectives Define the terms RECOVERY and INTEGRITY; Define Recovery Techniques; Explain Error and Error detection techniques, and Define types of Authorisation.
Which method of access uses key transformation? A Hash method of access uses key transformation.
Create an entity relationship diagram, Database Management System
Having clause This clause is used for producing conditions on grouped information. Example: Find maximum salary and department number of those departments where maxim
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