What is the relational database ?

[bhavnasingh482]

Hi




What is the relational database ?

[galih]

A relational database is a collection of data items organized as a set of formally-described tables from which data can be accessed or reassembled in many different ways without having to reorganize the database tables.

[kaufenpreis]

Databases have been a staple of business computing from the very beginning of the digital era. In fact, the relational database was born in 1970 when E.F. Codd, a researcher at IBM, wrote a paper outlining the process. Since then, relational databases have grown in popularity to become the standard.
Originally, databases were flat. This means that the information was stored in one long text file, called a tab delimited file. Each entry in the tab delimited file is separated by a special character, such as a vertical bar (|). Each entry contains multiple pieces of information (fields) about a particular object or person grouped together as a record. The text file makes it difficult to search for specific information or to create reports that include only certain fields from each record. Here's an example of the file created by a flat database:
Lname, FName, Age, Salary|Smith, John, 35, $280|Doe, Jane, 28, $325|Brown, Scott, 41, $265|Howard, Shemp, 48, $359|Taylor, Tom, 22, $250
You can see that you have to search sequentially through the entire file to gather related information, such as age or salary. A relational database allows you to easily find specific information. It also allows you to sort based on any field and generate reports that contain only certain fields from each record. Relational databases use tables to store information. The standard fields and records are represented as columns (fields) and rows (records) in a table.
With a relational database, you can quickly compare information because of the arrangement of data in columns. The relational database model takes advantage of this uniformity to build completely new tables out of required information from existing tables. In other words, it uses the relationship of similar data to increase the speed and versatility of the database.
The "relational" part of the name comes into play because of mathmatical relations. A typical relational database has anywhere from 10 to more than 1,000 tables. Each table contains a column or columns that other tables can key on to gather information from that table.
By storing this information in another table, the database can create a single small table with the locations that can then be used for a variety of purposes by other tables in the database. A typical large database, like the one a big Web site, such as Amazon would have, will contain hundreds or thousands of tables like this all used together to quickly find the exact information needed at any given time.
Relational databases are created using a special computer language, structured query language (SQL), that is the standard for database interoperability. SQL is the foundation for all of the popular database applications available today, from Access to Oracle.

[Dazzy Hayden]

In relational database, the data can be arranged in the form of tables.

[Anny33]

Relational Database is a combination of tables.

[johnstark166]

a database structured to recognize relations between stored items of information.

[tomfam]

Relational database management system is the most popular from database management system use to organizes data, comprise relational and represented as tables.

[pihu]

in relational database tables are related with each other like master and child table .. this relationship are created with the help of keys , primary key and foreign key

[seo1]

a database structured to recognize relations between stored items of information.

[doyanblog]

database is a part of the sites and fill all information

[Diana Smith]

Relational Database Management System

RDBMS is a collection of relational database management System.it shows all data information in tuples or column wise.

[webtech]

A relational database is a collection of data items organized as a set of formally-described tables from which data can be accessed or reassembled in many different ways without having to reorganize the database tables.

[ziya.pathan]

A relational database is a collection of data items organized as a set of formally-described tables from which data can be accessed or reassembled in many different ways without having to reorganize the database tables

[pxl]

These is an collective set of multiple data organized by table well define relationship between the data tables..

[technodesign]

A relational database is an assortment of information items structured as a set of formally-described platforms from which information can be utilized or put back together in many different ways without having to rearrange the information source platforms.