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1. Which model is used to store data in tree structures
Ans: Hierarchical model is used to store data in tree structures
List some security violations (or) name any forms of malicious access. A) Unauthorized reading of data B) Unauthorized modification of data C) Unauthorized destruction of
What is Functional Dependency? A Functional dependency is shown by X Y among two sets of attributes X and Y that are subsets of R specifies a constraint on the possible tuple
List the set operations of SQL? 1) Union 2) Intersect operation 3) The except operation
In tuple relational calculus P1 → P2 is equivalent to ? A In tuple relational calculus P1→ P2 is equivalent to ¬P1 V P2. (The logical implication expression A B, meaning
List any two disadvantages of a database system ? The disadvantages of database system are: • Database systems are difficult, complex, and time-consuming to design. • Substanti
I need to Map an E-R diagram to a relational schema
why older data models are being replaced by new data models.
a method named WonGame that checks each letter in the word is matched by its label
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
What exactly is the concept of Functional Dependencies? And how do we associate this concept with the logic of Super-keys, Candidate Keys, etc? Given Relation R(A,B,C,D,E) with de
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