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Define the term Domain.
For each n every attribute there is a set of permitted values known as the domain of that attribute.
What is object containment? References among objects can be used to model dissimilar real-world concepts.
How to reduce data redundency
word limit no mentioned
What are the disadvantages of relational approach? Disadvantages of relational approach: • Substantial hardware and system software overhead • May not fit all business models •
Define database management system? Database management system (DBMS) is a set of interrelated data and a combination of programs to access those data.
Consider the relation PERSON. If you want to display details of persons having age less than or equal to 30 than the select operation will be used as follows: σ AGE The resu
What do you understand by a view? What does WITH CHECK OPTION clause for a view do? - A view is a virtual table which comprises fields from one or more real tables. - It is
Give the forms of triggers? The triggering event can be insert or delete. For updated the trigger can state columns. The referencing old row as clause The referencing
object oriented database
Determine the rule that a value of a foreign key should appear as a value of some particular table is called a Ans: Referential constraint. The rule that a value of a fo
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