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Question 1 Indexes are ocasionally defines on a single field of a file called an indexing field. List and describe the different types of indexes
Question 2 Consider a book is written by a particular author. And you have to explain to someone about the relationship that exists between the author and the book. Normally you can draw a diagram and show the relation. These diagrams are called entity-relationship diagram in which book is one entity, author is one entity, and the relationship that exists between the two entities is written. Likewise explain the various notations used to represent the ER diagram.
Question 3 Consider a banking database (select the tables and fields of your choice). Now apply all the operations of relational algebra and find the result.
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
entity relationship diagram for online examination system
What is foreign key? Foreign Key - Let there are two relations in tables R and S. Any candidate key of the relation R that is referred in the relation S is known as the forei
WHAT IS DBMS
Define and differentiate between ordered indexing and hashing. Ans: Ordered indexing: To gain fast random access to records in a file, we can make of an index structure. Every
Explain the concepts of relational data model? Relational Data Model - The relational model was first introduced through Prof. E.F. Codd of the IBM Research in the year 1970
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
non numeric literals
Database Manager It is the interface among low-level data, queries and application programs. Databases typically need a large amount of storage space. It is kept on disks, as
write a short note on participation role? Participation role: roles are indicating in E-R diagram by labelling the lines that connect diamonds to rectangles.
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