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A database refers to an electronically preserved and accessible set of data. The data is saved so that users do not encounter any search and modification challenges in a structured and correct manner. This is necessary to create an archive so all the information and documentation have to be stored so they can be used to update or revisit at a later date. This is also exchanged with various applications by the use of a DBMS. DBMS lets consumers maintain their applications healthy and usable.
Commercial database: A commercial database refers to data processing that may be electronically viewed, for example on television. The user has no right to change or modify it. So, via a commercial connection is the only way to reach this database.
Operational databases: Operational databases are the most commonly used ones in areas such as marketing, production, management, etc., such as in the online transactions, information of the employees, and customers.
Centralized database: Accessing, storing, and updating the database in a single location. The centralized location is often a central database system accessible remotely.
End-user database: The end-user database can be used through a query language by end-users of a software application. Generally, this database is distributed between various end-user applications users.
Distributed database: The main feature of the database is that the data is stored on multiple computers at the same location or on different machines at different locations and is networked. A single communication link helps the common database accessed and connected with it.
Personal database: this database is formed for personal use only the user can modify it and have access to it.
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Databases are used by all the organizations these days. It helps in maintain and organize the data.
The use of databases can reduce the duplication of data.
Modification and retrieval of data are very easy hence improves data consistency.
Data can be shared among other users easily.
The availability of data is high.
Computer-aided software engineering tool: tools required for designing and development of the database.
Repository: it can be defined as where the actual data is stored.
DBMS: a software used to maintain the database.
Database: a collection of data stored.
User interface: platform by which the user interacts with the system.
Database Management System is a software application set that allows users to change or incorporate data in the database. The development, collection, modification, or maintenance of data can be simpler with DBMS. The program is the interface between software and end-user programs. It guarantees greatly structured and readily available data stored.
The three essential elements of a DBMS are data, database engine, and database structure. The database schema describes the functional form of the database by the database system. The archive is managed in a systematic manner and the data is stored continuously regularly.
DBMS provides end to end-user access to and uses the data for modification or retrieval simultaneously.
The main advantage of DBMS is that the data is more managed and safe than any external source.
Several users have managed access to the data through DBMS.
The same database can be used for processing and modifying the data through various applications.
The GUI also allows data processing faster. The user would also able to use a basic application to obtain the data. This is also available with a GUI.
DBMS offers integrated integrity checks to ensure accuracy and data integrity.
There are two types of database architecture.
Two-tier architecture: That is an interface used while the client operates on a device and connects to the server directly.
The advantage of this type is that it is easier to maintain and understand existing systems. However, as many users arise, this model provides poor results.
Three-tier architecture: Another layer between the client and the server occurs in this case. The customer does not contact the server directly. It interacts with an app server that communicates further with the database system, which then processes queries and manages transactions. This intermediate layer serves as a mechanism for the exchanging of data between server and client partly processed. In the case of wide web applications, this type of architecture is used.
Implementation and communication complexity has increased. Because of the presence of the middle layers, such coordination would be difficult.
Network model: A network model is a database model designed to represent objects and their relationships with flexibility. The scheme is known to be a graph in which connection forms are arcs and objects are nodes and a special function of the network layout.
Hierarchical model: Within this model, the data is arranged into a tree structure, which ensures that each record a single parent. The handling of all forms of knowledge is effective. The top node object called Root exists only one.
ER model: Peter Chen created this model for database architecture. An object is something inherently or theoretically occurring.
Relational model: Data are stored as tables known as relations in this layout. Each table row contains one TUPLE list. ATTRIBUTES is named for every column of the table.
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