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A database is for storage purpose. It is defined as a storage element which stores data and information. It defines various data management principles and keeps a track of useful information of an enterprise. It stores data in an organized way. Relational databases are most widely used in organizations while dealing with data. It is a tabular database where data can be reorganized and accessed in a number of different ways. Moreover, distributed database and object-oriented programming database also play an important role in computational databases.
A computer database consists of aggregations of data records or files. A database manager is responsible for managing database as he provides users the capabilities of controlling read/write access, analyzing and specifying report generation for usage. To update a database, a standard language is used for making interactive queries which is called as Structured Query Language.
A database can be termed as structured repository of indexed information which represents a group of linked data files. It allows updating, easy retrieval, analysis, and output of data. The stored data could be in any form viz. reports, scripts, tables, graphics, text, etc. Databases are kept with full security in large organizations as they contain precious information in them. Different types of databases are given below:
Database management is type of database system which provides users and programmers to create, update and manage data in a systematic way. The most effective database system used nowadays is relational database. A relational database stored its data into relations namely rows and columns. It consists of table for its storage purpose. The commercial examples of RDBMS are oracle, mysql, sql server and ms access which are majorly used in large organizations for official working.
These databases are not cloud based. C and c++ languages are used for their implementation. SQL server is windows based while MySql and oracle have linux, solaris, windows as its server operating system. All these databases supports XML and secondary indexing. These also uses triggers and foreign keys.
SQL server uses API viz. ADO.NET, JDBC, ODBC, OLE DB, Tabular Data Stream and it is used with allmost all the frontend programming languages.
In the early days, database applications were built on top of file systems. The following are the drawbacks of using file systems to store data which includes:-
- Data redundancy and inconsistency: It means that there are multiple file formats and the duplication of information occurs in different files
- Difficulty in accessing data : It involves the need to write a new program to carry out each new task
- Data isolation: It means multiple files and formats with the integrity problems
- Integrity constraints : It has become part of program code and it’s hard to add new constraints or change existing ones
- Atomicity of updates : It includes failures may leave database in an inconsistent state with partial updates carried out
- Concurrent access by multiple users : It allows concurrent access which is needed for performance. This is due to the fact that uncontrolled concurrent accesses can lead to inconsistencies.
- Security problems : It means that database systems offer solutions to all the above problems.
A database can be summarily described as a repository for data. This makes clear that building databases is really a continuation of a human activity that has existed since writing began. It can be applied to the result of any bookkeeping or recording activity that occurred long before the advent of the computer era. However, this description is too vague for some of our purposes, and we refine it as we go along.
The creation of a database is required by the operation of an enterprise. We use the term enterprise to designate a variety of endeavors that range from an airline, a bank, or a manufacturing company to a stamp collection or keeping track of people to whom you want to write New Year cards.It is to be noted that no computer is necessary for using such a database. However, the existence of computers to store and manipulate the data does change user expectations but, we expect to store more data and make more sophisticated use of these data.
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