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In an E-R diagram how attributes are represented ?In an E-R diagram attributes are represented in a ellipse.
random file sharing
how does Btree differ from a B+ - tree?
What is the role of a database administrator?
Which of the operations constitute a basic set of operations for manipulating relational data? Relational algebra operations constitute a basic set of operations for manipulati
Define average seek time. The average seek time is the average of the seek times, calculated over a sequence of random requests.
Describe Dynamic Model. The dynamic model specifies allowable sequences of changes to the objects from an object model. It contains event trace diagrams describing scenarios. A
Define Hash files organization a. Hashing includes computing the address of a data item by calculating a function on the search key value. b. A hash function h is a functi
Explain Dynamic Two-Phase Locking Here a transaction locks a data item instantly earlier than any operation is applied on the data item. After finishing all the operations on
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Database Administrator One of the main perpose for having the database management system is to have control of both data or programs accessing that data. The person having li
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