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A super key is an attribute or set of attributes used to recognize the records uniquely in a relation. For instance, in the Relation PERSON defines earlier PERSON_ID is a super
Implementation of association as an object Implement as a separate association object, independent of either class, as in Figure. An association object is a group of pairs
Farmer Bob, Farmer Jane and Farmer Jose run a cow farming co-op. For every cow they keep the cow’s name, age (or date of birth), breed and numbered plastic ear tag. The each of t
List the table modification commands in SQL? A) Deletion B) Updates C) Insertion D) Update of a view
Convert the following ER - diagram (Entity Relationship Diagram) into a relational database (the primary keys are underlined): Ans: The relational database schema f
why data in an RDMS need to be normalised
Aggregation : One limitation of the E-R diagram is that they do not permit representation of relationships between relationships. In such a case the relationship along with its ent
Consider a systems development project with the following data Activity Duration (weeks) Precedence Relationship 1. Software design
Question: A DBMS built for Online Transaction Processing (OLTP) is generally regarded as unsuitable for data warehousing. Each system is designed with a different set of requir
State the functional approach of object oriented methods Moving from a functional approach to an object oriented one needs a translation of functional model elements into objec
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