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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.
Problem: ‘Users and Information system specialists need to spend inordinate amounts of time locating and gathering data' (Watson and Hal, 1998) Recent developments in the ar
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
Explain the disadvantages of file oriented approach? In the oriented approach Applications are designed in isolation. Design of application is optimized for one application. In
What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
What are the advantages of Logical Databases? It offers a simple-to-use selection screens. You can change the pre-generated selection screen to your needs. It offers check f
What are the types of reference?explain it with suitable examples? Object oriented language given the ability to refer the object attribute of the type can be referred to the s
Define various ways in which SELECT statement can be used for record selection Technology? SELECT gives you control over a number of aspects for record retrieval: 1) Which
Difference between Operating System and Database Security Security within the operating system can be executed at various levels ranging from passwords for access to system, t
which component of DBMS can be embedded in a program? The data manipulation language (DML) is a component which is embedded in a program.
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an ex
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