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Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
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
explain participation constraints with examples
Explain the utilities which help the DBA to manage the database? Every DBA uses database utilities to maintain and control their databases. But there is a lot of confusion wit
Which is a legal expression in SQL? SELECT NAME FROM EMPLOYEE is a legal expression in SQL.
ERD Diagram of Medical Recruitment Agency?
What is entity in DBMS? Entity: A DBMS entity is either a thing in the modelled world or a drawing element in an ERD.
what is attribute is attribute inheritance in dbms?
Increased parallelism : Since the replicated date has several copies a query can be distributed or can be answered from the smallest loaded site. Also, with more replicas you have
In a relation, tuples are not inserted in any definite order. Ordering of tuples is not defined as a part of a relation definition. Though, records may be structured later accordin
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