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INTRODUCTION
Databases and database systems have become an essential part of our daily life. We encounter many activities that involve some interaction with a database almost daily. The examples include withdrawal from a bank and/or deposit, hotel, railway reservation or airline, accessing a computerised library, order a magazine subscription from a purchase items, publisher from supermarkets. In all the above given cases a database is accessed. These may be known as Traditional Database Applications. In these kinds of databases, the information stored and accessed is numeric or textual. Though, with advances in technology in the past few years, dissimilar databases have been developed such as Multimedia Databases that sound messages, store pictures, and video clips,; Geographical Information Systems (GIS) that can store maps, satellite images, and weather data etc., and Real time databases that can control industrial and manufacturing processes. In this section, we will be introducing the concepts involved in the Database Management System.
construct a B+ tree for the following set of key value (2,3,5,7,11,19,23,29,31) in ascending order where the pointers that will fit in one node is as follows:A. four B. six C. eigh
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Illustrate the statement 'Projection operation distributes over the union operation'. Give an example. Ans: Π L (E 1 ∪ E 2 ) = (Π L (E 1 )) ∪ (Π L (E 2 )) This says th
wrie a report on whether a BSc n information systems develops the skills required by employers in Database administration
The Locking Protocol: To manage concurrency related problems we use locking. A lock is mainly a variable that is associated with a data item in the database. A lock can be located
1 NF Normal Form The domain of attribute must add only atomic (simple, indivisible) values First normal form (Minimal Form or 1NF) is a normal form need in database normalizat
#explain five disadvantages of a dbms..
Determine the steps of path in association network You can analyse use of paths in association network in the following steps: Examine every operation and see what asso
What is a transaction ? The Transaction is a unit of data processing. For instance, many of the transactions at a bank may be withdrawal or deposit of money; transfer of money f
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
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