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Define Specialisation and generalization in brief?
Specialisation / generalization: Generalization or Specialization represents the is a relationship set, an necessary element of the object oriented paradigm. The major idea in Generalization/Specialization is in which one object class (the specialization) is a subset of another (the generalization).
Explain the EXISTS and UNIQUE functions of SQL. Give an example for each? EXISTS: The EXISTS function takes one parameter that is a SQL statement. If any records exist which
The Concurrent Transactions Almost every commercial DBMS support multi-user environment. Therefore, allowing multiple transactions to proceed concurrently. The DBMS must make
what is the importance of back up files
a method named WonGame that checks each letter in the word is matched by its label
What is Information System?
Differentiate between horizontal & mixed horizontal fragmentation?
Making Common Behaviour Abstract Let us define abstraction "Abstraction means to focus on the necessary, inherent aspects of an entity and ignoring its accidental features". O
The insertion of a tuple in the aim of reference does not cause any destruction. Though, insertion of a tuple in the relation in which, we has the foreign key, for instance, in ASS
explain the steps for reduction of er model into relational model?
What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only
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