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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.
let us consider a table having 2200 records and the fixed size of the table to be considered as 25.then how many numbers of table is requredto perform horizontal fragmentation
Define Deadlock recovery measures To recover from deadlock, the cycle in the wait-for-graph should be broken. The common technique of doing this is to rollbac
as a customer service employee explain five measures you would recommend to make even a displeased students patronize the school canteen
Which is another name for weak entity? Child is another name of weak entity.
Creating views with check option : This option limits those updates of data values that cause records to go off the view. The following instance tells this in more detail: Examp
My cut off date is very soon in a Database subject and i dont know how to solve anything in it
What is first normal form? The domain of attribute must contain only atomic (simple, indivisible) values.
Consider an information system designed for an online company which provides IT products and services. These include desktops, laptops, networking products, IT books, parts, and te
Query Processor The query language processor is responsible for taking query language statements or shifting them from the English-like syntax of the query language to a form
Differentiate sub-class and super-class? The specialization of a class is known as subclasses.eg: employee is a subclass of person and teller is a subclass of employee. Convers
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