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What is candidate key?
Candidate Key - A candidate key of an entity set is a minimal superkey, which uniquely identifies each row in the relation.
construct an er diagram for a hospital with a set of patients and a set of medical doctors. associate with each patient a log of various test and examination conducted.convert er d
I want Database Of United Kingdom with Criteria of:\r\n\r\n1). Name, Number, City, State, Postal Code, Address, Email id, DOB.\r\n\r\n2). Unsecure Debts only adds Credit Card Payme
we need example of 2phase locking
What is a trigger
what is cascading? what is rollback cascading? please explain in detail
object oriented database
what is Mapping Constraints? with examples
Explain data dictonary on oracle ? Data Dictionary - Data dictionaries are the system tables in which contain descriptions of the database objects and how they are structured.
The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
what is natural join?
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