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In an E-R diagram an entity set is represent by?
In an E-R digram entity set is represted by rectangle.
Describe the algorithm for updating indices for a single level index when a record is (i) Inserted (ii) deleted What will be the modification if there are multilevel in
Explain the structure of well formed formulae in relational calculus. Ans: a. An atom is a formula b. If P1 is a formula, after that so are ¬P1 and (P1) c. If P1 and P2 a
Discuss how the bi-directional Implementations are made. In bi-directional implementation of the association, a pair of references must implement every link. The declarations a
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
Differance between internal and external schema? Internal and external schema: Internal Schema • Describes the physical storage structure • Uses a physical data model External
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
what is Mapping Constraints? with examples
Describe the development process of Object oriented methods Object oriented methods have roots which are strongly anchored back in the 60s, functional and structured methods we
employee(empid,empname,dept,telno,mobno, add,sssno,tinno,WEdates,WEcomp,WEadd,WEpos,WEres) this is a employee record which is need to be normalize.the WE means work experience
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