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What it creates while a primary key is combined with a foreign key?
It creates Parent-Child relation ship between the tables that connect them while a primary key is combined with a foreign key.
Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
What is substitutability? Any method of a class-say A can equally well be adjured with any object belonging to any subclasses B of A. This characteristic leads to code reuse, a
Explain the Deferred Update The deferred update methods do not physically update the database on disk till after a transaction reaches its commit point; after that the updates
What is Normalization? Database normalization is a data design and organization method applied to data structures based on rules that help building relational databases. In rel
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
how to calculate frequency count of algorithm
An entity set that does not have sufficient attributes to form a primary key is called? An entity set that doesn't have sufficient attribute to form a primary key is known as w
Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.
what factors might influence a company to outsource its IT infrascture.
external and internal mapping with examples
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