The importance of database,why progammer must learn?

The importance of language acquisition for the database programmer then I'll explain why it's important

The database , is a collection of information stored on a computer in a systematic way so that it can be checked using a computer program to obtain information from the database. The software used to manage and call query (query) data base called a database management system (database management system, DBMS). Database systems are studied in information science.
The term "database" originated from computer science. Although then it means wider, put things outside the field of electronics, this article on a computer database. Note that similar to the actual database existed before the industrial revolution in the form of ledgers, receipts and collection of data related to the business.
The basic concept of the database is a collection of records, or pieces of knowledge. A structured database has a description of the kinds of facts that are stored in it: an explanation is called schema. Scheme describing the object, represented a database, and the relationships between objects. There are many ways to organize the scheme, or modeling the database structure: these are known as the model database or data model. Models are commonly used today is the relational model, which in layman terms represent all the information in the form of tables that are interconnected with each table consists of rows and columns (the true definition uses mathematical terminology). In this model, the relationship between table represented premises using the same values ​​between tables. Other models such as the hierarchical model and the network model use a more explicit way to represent relationships between tables.
The term database refers to a collection of data that are interconnected, and the software should be referred to as a database management system (database management system / DBMS). If the context is clear, many administrators and programmers use the term database for both meanings.
Environmental database
Database environment is a habitat where there is a data base for the business. In a database environment, users have the tools to access the data. Users perform all types of work and their varied purposes such as to collect data (data mining), modify data, or trying to create new data. Still in the database, some users are not allowed access to the data, both physically and logically. " (Koh, 2005, in Janner Simarmata & Imam Paryudi 2006: 33).

Database software that are widely used in programming and a device database cedar (high level):

• Microsoft SQL Server
• Oracle
• Sybase
• Interbase
• XBase
• Firebird
• MySQL
• PostgreSQL
• Microsoft Access
• dBase III
• Paradox
• FoxPro
• Visual FoxPro
• Arago
• Force
• Recital
• dbFast
• dbXL
• Quicksilver
• Clipper
• FlagShip
• Harbour
• Visual dBase
• Lotus Smart Suite Approach
• db2 

 In addition to the above software, there are also software programming database cedar low (low level), including:

• Btrieve
• Tsunami Record Manager