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Explain sorted File with advantages?
Sorted file The sort utility shall perform one of the subsequent functions:
1.Sort lines of all the named files together and write the result to the specified output.
2.Merge lines of all the named (presorted) files together and write the result to the exact output.
3.Check which a single input file is correctly presorted.
need to get answer for questions 3&4 on this page in part 1
Guidelines for creation of table: Table name should begin with an alphabet. In table name, single quotes and blank spaces are not allowed. Reserve words of that DBM
joins
Describe integrity constraints? Integrity Constraints - A database is just as excellent as the information stored in it, and a DBMS must therefore help avoid the entry of inc
Describe Participation Constraints? Participation Constraints - The participation constraint exacts whether the existence of an entity depends on its being related to another
What is a hash index? A hash index organizes the search keys, with their associated pointers, into a hash file structure.
What are the functions of an accumulator? The accumulator is the register associated with the ALU operations and sometimes I/O operations. It is an integral part of ALU. It hol
Explain in details about the f unctions of DBA ?
Super keys of a relation can have extra attributes. Candidate keys are minimal super key, i.e. such a key have no extraneous attribute. An attribute is known as extraneous if even
Update or Modify operation alters the existing values. If these operations alter the value that is the foreign key also, the only check need is the similar as that of the Insert op
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