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Define upgrade and downgrade?
It gives a mechanism for conversion from shared lock to exclusive lock is called as upgrade.
It gives a mechanism for conversion from exclusive lock to shared lock is called as downgrade.
List the set operations of SQL? 1) Union 2) Intersect operation 3) The except operation
brief history,definition,current trends and future trends if any of data fragmentation
Explain data independence ? Data independence is the capacity to modify the schema at one stage of a database system without having to change the schema at the further level.
A relationship set is a set of relationships of the similar type. For example, let consider the relationship among two entities sets course and student. Collection of all the in
Determine the OBJECTIVES of object design After passing through this unit, you should be able to: describe and apply concept of generalisation; understand and appl
Give the levels of data abstraction? There are three levels of Data Abstraction a) Physical level b) logical level c) view level
What does conceptual design work? A conceptual design involves modelling independent of the DBMS.
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Which method of access uses key transformation? A Hash method of access uses key transformation.
Define granularity, hierarchy of granularity of locks & multiple granularity locking. Explain the modified two phase locking along with multiple granularity locking. Ans: The s
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