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Whst is logical schema ?
Logical schema is the entire database.
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
What is the use of Union and intersection operation? Union: The result of this operation contains all tuples that are either in r1 or in r2 or in both r1 and r2.Duplicate tuple
Describe an data dictionary? A data dictionary is a data structure which keeps meta data about the structure of the database ie. the schema of the database.
List the Armstrong's axioms for functional dependencies. What do you understand by soundness and completeness of these axioms? Ans: The Armstrong's axioms are: F1:
State the Object Design for Processing The object design phase comes after analysis and system design phase. The object design phase includes implementation details like as i
Give an example of multiple inheritance. One example of multiple inheritance is a committee for students affair which include faculty and administrative staff member.
what is cascading? what is rollback cascading? please explain in detail
how to implement hyrise in C plus plus
What do you mean by atomicity and aggregation? Atomicity : Either all actions are carried out or none are. Users should not have to worry about the effect of incomplete trans
Primary index A primary index is a file that has a sorted series of records having two columns: a block address for that key field in the data file; and the ordering key field.
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