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Which operation is used if we are interested in only certain columns of a table? PROJECTION operation is used if we are interested in only certain columns of a table.
Un-Normalized Form (UNF) If a table having non-atomic values at every row, it is said to be in UNF. An atomic value is something that cannot be further decomposed. A non-atomic
Explain the systems development life cycle. This is the traditional method to develop, maintain, and replace information systems that contains the project identification and se
why are older data base model are being replaced by new data model
What is foreign key? Foreign Key - Let there are two relations in tables R and S. Any candidate key of the relation R that is referred in the relation S is known as the forei
a publishing company produce scientific books on various subjects. the books are written by authors who specialize in one particular subject. the company employs editors who, not n
Due date for May 8
What are ways of finding out either an update is required or not for derived attributes? The ways to find out an update is required or, not are as: Explicit update
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
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