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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
What is the difference between serial and sequential files? How searching is applied on both? Ans: A serial file is one where the records have been stored in the order where
What is the main advantage of the object model? What are its different components? The object model focuses on the logical data structures. Each object model comprises of many
how design database from begining
Write a short note on built in function in QBE? Built in function in QBE: QBE involves various built in functions like AVG, MAX,MIN,SUM and CNT. We must prefix these operator
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
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What is meant by normalization of data? It is a process of examining the given relation schemas based on their Functional Dependencies (FDs) and primary key to achieve the prop
Types of data independence Data independence can be classified into the following two types: Physical Data Independence: This means that for any change made in the physi
Failure Controlling Methods: Failures can be handled using different recovery methods that are talk about later in the unit. But the first question is doing we really require recov
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