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What is the role of ORDER By Clause?
ORDER BY clause: The ORDER BY clause permits you to sort the records in your result set. The ORDER BY clause can just be used in select statements.
Explain the Concept of Two-phase Locking It concerns the positions of locking and unlocking operations in each transaction. In this protocol every transaction issue lock and u
a. Define the term "deadlock". There are four conditions that must hold before deadlock is possible. Name them. b. Outline an algorithm that detects whether there is a deadlock.
Illustrate how you can use QBE to perform logical AND and OR operation
what problems are raised by the database? why is it so controversial? why is data quality an issue?
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
Explain the Dynamic Hashing Techniques There are two methods in it: extendible hashing - stores an access structure in addition to the file, and therefore is somewhat identica
What is Cross Product? Simply Cross product is Binary Operator
What are the several kinds of the update operations on relations? Also explain the constraints on these update operation. Give instance in support of your answer. There are th
Attributes that are directly kept in the data base. For example, 'Birth date' attribute of a person. Derived Attributes that are not stored directly but can be derived
explain at least five widly used case tools
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