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Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient. Figure:
What is Trigger? Trigger: A database trigger is procedural code which is automatically executed in response to specific events on a particular table in a database. Triggers can
what is natural join?
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
What are the several forms of identity? a) Value b) Name c) Built-in
Consider the join of a relation R with relation S. If R has m tuples and S has n tuples, then the maximum size of join is: If R has m tuples and S has n tuples then maximum siz
explain various steps uses in evaluation and maintenance of MIS.
What is known as clustering file organization? In the clustering file organization, records of several dissimilar relations are stored in the similar file.
give some example real-life situations where DBMS are most suiitabe
What is a primary key? Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.
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