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Explain the disadvantages of creating a temporary table?
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Parallelism of transaction execution: A transaction can be divided into various sub-queries that can operate on fragments in parallel. This enhances the degree of concurrency in t
Ancestry database records information about family trees . Following information is recorded about each person: FIRSTNAME first name SURNAME surname MNAME maiden name (if
What is a primary index? A primary index is an index whose search key also explains the sequential order of the file.
Question: (a) Discuss the difference between a composite key and a composite attribute. How would each be indicated in an E-R diagram? Support your answer with appropriate exam
Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people
FDs in Entities : Student entity : Enrolment number → Student name, Address Course Entity :
Explain trigger? Trigger: A database trigger is procedural code which is automatically executed within response to certain events on a particular table in a database. Trigger
What is deadlock? How can it be avoided? How can it be resolved once it occurs? Deadlock happens when two transactions are each waiting on a resource that the other transaction
What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.
Advantages of Data Distribution The primary benefit of distributed database systems is the ability to access and share data in a reliable and efficient manner.
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