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Consistency: This property makes sure that a complete transaction implementation takes a database from one consistent state to another consistent state. If the transaction fails even then the database should come back to a consistent state.
What is NULL? Simply NULL means not in value.
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
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
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
Prove that a relation which is 4NF must be BCNF. Ans Let R be in 4NF. Suppose it is not in BCNF. Hence, there exists an FD X→Y in R such that x is not a super key. Although
cardnality ratio for humanresource mangement system
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
List the Armstrong's axioms for functional dependencies. What do you understand by soundness and completeness of these axioms? Ans: The Armstrong's axioms are: F1:
Which model is record based logical model? Network Modelis basically known as record based logical model.
Farmer Bob, Farmer Jane and Farmer Jose run a cow farming co-op. For every cow they keep the cow’s name, age (or date of birth), breed and numbered plastic ear tag. The each of t
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