Database Programming

Databases are used to store data also providing modification & retrieval of data in an efficient manner. Databases is used everywhere like in Railways, Airports, Schools, Hospitals, Business , Shopping Malls etc. Database helps us to manage the data efficiently and in a easy manner.

When a computer user wants to store data electronically they must do so by placing data in files. Files are stored in specific locations on the hard disk (directories). The user can create new files to place data in, delete a file that contains data, rename the file, etc -- all known as file management; a function provided by the Operating System (OS).

If the user wishes to perform some operation on the data he has placed in the file, such as viewing a list of his friends that celebrate their birthday in June, he has to scroll through all the data by himself in order to see the data he is interested in. Moreover, he has to know where he put the files that contain the data, and if there are multiple files he has to remember to go through each one of them.

A Database Management System is intended to remove this burden of manually locating data, and having to scroll through it by allowing the user to create a logical structure for the data beforehand, and then allowing the user to place the data in the database that the DBMS is managing. In this way the DBMS abstracts away the physical concerns of organising files, and provides the user with a logical view of the data.

Note, that the DBMS will still -- behind the scenes though -- place the data in files on the hard-disk.

Database is multiuser and provides utilization of resources whereas in file management there is no utilization of resources.

Data protection refers to a set of techniques and procedures for ensuring the privacy, availability, and integrity of your information. It's also known as data security or information privacy. Any organisation that gathers, processes, or stores sensitive data must have a data protection plan.

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You can manipulate data in many ways with a spreadsheet like Excel. Mainly it is done using formulas and functions. You can also use some of the databasing capabilities, like Filters, to do it, or you could use Pivot Tables to help you analyse the same data in different ways. There are many other built in ways of doing it, like sorting, goal seeking, solvers, scenarios, macros, formatting, validating and many other things. There is a huge amount that can be done with spreadsheets, so there are all sorts of ways of manipulating data using them.

Functions of a Database Management System:

- Database Definition

- Database creation (storing data in a defined database)

- Retrieval (query and reporting)

- Update(Changing the contents of the database)

- Programming User Facilities for system development)

- Database revision and restructuring

- Database integrity control

- Performance Monitoring

An ER diagram for a college system is an entity relationship diagram that is used to identify the entities of the college system and what those entities expect from the system. Examples of entities to include are students, financial aid, registers, and professors.

Youtube is a website not a database, but there is certainly a database behind the http/web interface.

Any website that stores massive quantity of data must use some form of database, whether the database is SQL-based, no-SQL / file-based.

So youtube uses a database, and probably multiple databases since some databases are better at certain tasks than others. However there is no database system called youtube. From the user's perspective youtube is just a website that uses databases.

Data processing is the means by which raw data is turned into usable information. Manual data processing is the physical entering and organization of data. Though most data processing is now done by computers, there was a time when collected data was recorded and tabulated by hand in paper spreadsheets.

This position takes the business requirements and models a database based on the business's needs. Does the database need to be in real-time? What kind of data will it hold? Sensitive? There's hundreds of factors that determine how the database is designed, updated, protected. Each business is different.

it is occasionally access the data base, but they may need different information each time.They use a sophisticated database query language to specify their request and are typically middle or high-level or other occasional browsers.

The ration Between total Participation and partial participation is called as Cardinality ration.

1 byte (Unicode)

In places like schools, colleges and training centres you can get courses. You will also find online courses and other online resources to help you learn, on the internet. You can also buy books on Access. Often you will get a CD with them, that provide training.

SQL, an acronym for Structured Query Language, is an international standard method of communicating with databases. It is important because it allows the use of virtually any programming language to be used in tandem with any specific database.

Cross compatibility Disk is silent

There are number of new technologies in database, the one prevailing in industry is No-SQL.No-SQL is a database that is used to handle the unstructured data which is not possible in SQL.

Example of some No-SQL database are MongoDB , Cassandra, CouchDB etc.

Access Data Types are : Autonumber, Memo Text, Number, Yes/No, date/time, OLE object, Hyperlink, Currency.

Database management systems perform a multitude of functions including providing security, multi-user access, it also transforms data into information. Database management systems also manage data stored and contains programming languages.

a phone book is 1 .. i think

* The database schema * Schema objects * Indexes * Tables * Fields and columns * Records and rows * Keys * Relationships * Data types *

just follow this link

http://www.developer.com/db/article.php/719041

Quite true. This principle was immortalized by the phrase "garbage in, garbage out".

List the importance of security

- To prevent unauthorized data observation.

- To prevent unauthorized data modification.

- To ensure the data confidential.

- To make sure the data integrity is preserved.

- To make sure only the authorized user have access to the data.

There are 5120 MB in 5 GB. Refer to below : 1 bit = the value of 0 or 1 8 bits = 1 byte 1024 bytes = 1 kilobyte 1024 kilobytes = 1 megabyte 1024 megabytes = 1 gigabyte 1024 gigabytes = 1 terabyte 1024 terabytes = 1 petabyte So 1024 MB = 1 GB so i did 1024 * 5 and got 5150 MB in 5 GB.

It varies on which one you buy but most come with iLife (iPhoto, iMovie, iDVD, iWeb and garageband) and lots of other basic software like DVD player, iTunes and Preview (image viewing program). See Apple's website for specific details.