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What is a primary index?
A primary index is an index whose search key also explains the sequential order of the file.
What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.
find the name of supplier who supply some red part
Hierarchical
What are the physical characteristics of magnetic disks? Ans: A magnetic disk is a circular plate or platter of plastic or metal that is coated with magnetizable material lik
A database to track your progress in your college program will track your progress towards graduation! A database that has information containing the classes that you have taken, c
#question. acompani datdbase needs to store information about employees (identified by a social security number,with salary and phone as attributes) and departments (identified by
Consider the following relations: S (S#, SNAME, STATUS, CITY) SP (S#, P#, QTY) P (P#, PNAME, COLOR, WEIGHT, CITY) Give an expression within SQL for each of queries b
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
Aggregation : One limitation of the E-R diagram is that they do not permit representation of relationships between relationships. In such a case the relationship along with its ent
explain the level architectures of the database management system
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