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Which database level is closest to the users?
External database level is closest to the users.
Differentiate between natural join and outer join? Natural join is a binary operator which is written as (R * S) where as R and S are relations. The output of the natural join
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
Question : Mr. Smith Harry has a car manufacturing company which has recently integrated management information system. He wishes to obtain more information on ethics and socia
List the set operations of SQL? 1) Union 2) Intersect operation 3) The except operation
Insertion Anomaly: Inability to show certain information-The primary key of the over relation be (enrolment number, Cno). Any new tuple to be inserted in the relation should have
What is assertion? Mention the forms available. An assertion is a predicate expressing a condition that we wish the database always to satisfy. Domain integrity constraints.
i am not clear with the climetic condition of the north indian plain. can u plz explain it for me
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
#floating point representation is used to store
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