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What are the properties in a relation ?
In a relation Ordering of rows is immaterial and No two rows are identical.
#A multinational tour operator agency has gained new business growth in the North American market through the use of social media. Its operation has expanded by 50% within six mont
WOUND-WAIT
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
What is hashing file organization? In the hashing file organization, a hash function is computed on some attribute of every record. The result of the hash function specify in
(A) For the relation; CarSales (RegNo, BuyerName, Address, SalesPerson, Make, Model, Commission) The following functional dependences hold, RegNo _ID à Make, Model Reg
Outer Join: The use of Outer Join is that it still joins those tuples that do not have matching values in common columns are also contained in the result table. Outer join places
Your friend owns and operates a wholesale shoe business with annual revenues of $5 million dollars. His wholesale business specializes in supplying and supporting retailers with sh
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an ex
What are the basic objects of the data dictionary? Tables Domains Data elements Structures Foreign Keys
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