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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:
The insertion of a tuple in the aim of reference does not cause any destruction. Though, insertion of a tuple in the relation in which, we has the foreign key, for instance, in ASS
To eliminate duplicate rows (distinct operator) Example: SELECT DISTINCT DEPTNO FROM EMP;
Use of partial data by applications : In common, applications work with views rather than whole relations. Thus, it may be more appropriate to work with subsets of relations rather
The Form input elements are: Reporter name text type input Password
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
Design an EER schema for the following application and translate the EER schema into relational schemas (and constraints). It is possible that some requirements cannot be captured
What is the initial step for object-oriented designing The initial step for object-oriented designing is object modeling. Before we go into deep about object modeling first of
What does conceptual design work? A conceptual design involves modelling independent of the DBMS.
how to get assignment in DBMS? Please let me know
Please let me know how to get assignment?
do i need to post assignment first?
Database management is quite interesting but i want subject more clear. Do i get help from your best expert?
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