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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.
multiplicity constarin
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
What is meant by heuristic optimisation?Discuss the major heuristics that are applied during query optimisation.
Question: The following relational database schema corresponds to a part of a database used by the Registry Department of a university. DEPARTMENT (d#, d-name, head-of-dept)
You group has been hired by TrainingrUs.com to keeps track of training revenues. TrainingrUS.com wants you to keep scheduling. COURSE table contains following information:
Define Deadlock avoidance These protocols as well ensure that the system will never enter a deadlock state although the way it is done is different from deadlock prevention. I
What is a function group? A function group is a collection of logically related modules that share global data with every other. All the modules in the group are contained in
Probelm: a) In the context of OODBMS, define the following terms with appropriate examples. (i) Object class. (ii) Abstract class. (iii) Aggregation. (iv)
Creating views with check option : This option limits those updates of data values that cause records to go off the view. The following instance tells this in more detail: Examp
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