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What Count function return in SQL?
Count function within SQL returns the number of values. (Count function counts all the not null values in the exact column. If we need to count just distinct values than the DISTINCT keyword is also to be used)
In object oriented design, which steps must designer take to adjust inheritance? To readjust inheritance following steps should be taken: i) Rearrange and adjust the classe
The users who use easy-to-use menu are called ? The users who use easy to use menu are called as Naïve users.
What is Nested Queries explain in details? Nested Queries - A SELECT query could have subquery(s) in it. While a SELECT query having another SELECT query in it, is known as n
i would like to ask if you will do assignment of database number of words 1500 and how much
What is relationship? Give examples A relationship is an association between several entities. Example: A depositor relationship associates a customer with every account tha
Explain data independence ? Data independence is the capacity to modify the schema at one stage of a database system without having to change the schema at the further level.
3. (10 points) Assume that you have been presented with the following relation for the Baxter Aviation database: Charters (Pilot#, Pilot name, Aircraft ID#, #seats, Village, Fligh
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Describe the different RAID levels. Discuss the choices of the different RAID levels for different applications. Ans: There are several combinations of these approa
What is meant by computing the closure of a set of functional dependency? The closure of F denoted by F + is the set of functional dependencies logically implied by F.
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