Which of the following is not considered to be a basic element of an enterprise-class database system?
Answer: D
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_______ produces the relation that has attributes of R1 and R2
Answer: A
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SET concept is used in :
Answer: A
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The relational model feature is that there
Answer: B
In relational model data is stored in tables and if we talk about data independence it is one of the major feature of DBMS which holds in all DBMS models.
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The conceptual model is
Answer: D
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__________________ is collection of interrelated data and set of program to access them.
Answer: C
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Which of the following database object does not physically exist?
Answer: C
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A subschema expresses
Answer: C
A subschema expresses the external view. (External schemas are called also called as subschemas)
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Which of the following products was the first to implement true relational algebra in a PC DBMS?
Answer: D
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A file manipulation command that extracts some of the records from a file is called
Answer: A
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