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Compare wait-die deadlock prevention scheme with wait-wound scheme Ans: Wait-Die Scheme a) Based upon a nonpreemptive technique. b) If Pi requests a resource present
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
Security And Integrity After Reading the concepts of database recovery in the last section, let us now deal with a vital concept that helps in minimizing consistency errors in
Explain the paths in the association network We can analyze use of paths in the association network as given below: Calculate each operation Find associations whic
Can a domain, assigned to a data element be changed? Yes. We can do so by just overwriting the entry in the field domain.
What Count function return in SQL? Count function within SQL returns the number of values. (Count function counts all the not null values in the exact column. If we need to cou
multiplicity constarin
What is Outer join? They can be employed while we want to keep all the tuples in R, or all those in S or all those in both relations in the result of the JOIN in spite of of w
growing phase and shrinking phase are disjoint, why ?
Define NULL value NULL value NULL means something is unknown. It does NOT mean null (the digit 0). Null is as well employed as attribute value for a particular entity in which
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