Introduction to Database System

• A database is a collection of related data.
• By data,we mean known facts that can be recorded and that have implicit meaning.
• A database can be of any size and complexity. For example, the list of names and
  addresses referred to earlier may consist of only a few hundred records, each with a
  simple structure.

A database has the following implicit properties:

• A database represents some aspect of the real world, sometimes called the miniworld or the universe of discourse (UoD). Changes to the miniworld are reflected in the database.
• A database is a logically coherent collection of data with some inherent meaning. A random assortment of data cannot correctly be referred to as a database.
• A database is designed, built, and populated with data for a specific purpose. It has an intended group of users and some preconceived applications in which these users are interested.
  

An example of a large commercial database is Amazon.com

It contains data for over 20 million books, CDs, videos, DVDs, games, electronics, apparel, and other items. The database occupies over 2 terabytes (a terabyte is 1012 bytes worth of storage)
and is stored on 200 different computers (called servers). About 15 million visitors
access Amazon.com each day and use the database to make purchases. The
database is continually updated as new books and other items are added to the
inventory and stock quantities are updated as purchases are transacted. About 100
people are responsible for keeping the Amazon database up-to-date.

A database management system (DBMS)

A database management system (DBMS) is a collection of programs that enables
users to create and maintain a database. The DBMS is a general-purpose software system
that facilitates the processes of defining, constructing, manipulating, and sharing
databases among various users and applications.

• Defining a database involves specifying
  the data types, structures, and constraints of the data to be stored in the database.
• Constructing the database is the process of storing the data on some storage medium that is controlled
  by the DBMS.
• Manipulating a database includes functions such as querying
  the database to retrieve specific data, updating the database to reflect changes in the
  miniworld, and generating reports from the data.
• Sharing a database allows multiple users and programs to access the database simultaneously.

Other important functions provided by the DBMS include protecting the database
and maintaining it over a long period of time. Protection includes system protection
against hardware or software malfunction (or crashes) and security protection
against unauthorized or malicious access. A typical large database may have a life
cycle of many years, so the DBMS must be able to maintain the database system by
allowing the system to evolve as requirements change over time.
we will call the database and DBMS software together a database system.

eBook | ANDROID WIRELESS APPLICATION DEVELOPMENT Free Download

Book introduction

In GTU MCA sem 5 syllabus, ANDROID WIRELESS APPLICATION DEVELOPMENT is main text book.
Auther :: Lauren Darcey and Shane Conder,
Publication ::Pearson Education :: 2nd (2011

)

Features

• Covers application design, development, debugging, packaging, distribution, and much more
• Includes invaluable real-world tips from experienced mobile developers
• This book covers multiple Android SDK versions, which is how developers must work with Android

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Free download Adnroid ebook(pdf).
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eBook | Fundamentals of Database System Free Download

MCA sem-5 is started, Hope all of you are enjoying the final year of GTU MCA( hope so!! ). Well in my life of study , thing i hate most is Books price. so much expensive is this!!

In Sem-5 i have choose ADBMS as elective subject, of course it is threory subject, hvae to go for book. So i visited popular online shoopping site Flipkart.com.and Infibeam.com

Price of Book online ::

"Fundamentals of Database Systems”,Pearson Education, 5th Edition = Rs. 450 +
( Buy from Infibeam.com )

“Oracle 9i, DBA Handbook”, Oracle Press, TMGH Publications = Rs. 470 +

 if you can afford this books, its best to buy but id you can't afford this than don' worry.

we are here to give you free ebook(pdf) of this two ADBMS books,
free ebook(pdf) download of Fundamentals of Database Systems”,Pearson Education, 5th Edition and 
Oracle 9i, DBA Handbook

Download from here ::

First textbook      >> Download
Second textbook >> Download (this is 10G edition but theory same)

Note::
Price is seen on posting time that may change time to time,so refer website for latest price.

Thank You so much for our anonymous reader who shared a ebooks link with us.

(For Beginner) How to Setup Android App Development Tools Video Tutorials

In this lesson you will learn:

-Installing Eclipse
-Set up the link to the ADT
-Setting up the SDK and different android platforms
-Setting up the AVD

Download links:
Eclipse: http://www.eclipse.org/downloads/
Android SDK: http://developer.android.com/sdk/inde...
Android ADT: http://developer.android.com/sdk/ecli...

Additional help link: http://developer.android.com/sdk/inst...


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