What is Database Management System (DBMS)?


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What is the database management system?

Today, we are going to know all about DBMS. If you are also looking for this then just scroll and start reading. 

What is Database?

In the field of computers, a database is a collection of information organized in a way that allows easy access, modification, and management. Databases are used by organizations to store, retrieve, and manage information. 

With the development of databases around the middle of the last century, a new way of facilitating database management has been devised through special software called Database Management Systems (DBMS).

Database management systems?

Database management systems (DMS) are computer programs that specialize in creating and managing Databases. They provide both user and programmer with special ways to create, retrieve and modify data. DMS can be considered as interfaces between Databases and end-users, or between databases. 

Data and application software. Database management systems adopt special programming languages ​​called Query Languages. The database management system manages three database-related issues, the data itself, and the database engine, which allows access to, modification, or blocking of data, as well as database schema, all of which are designed to ensure the security of the data, its reliability and access to it by more than one user at the same time (in English: Concurrency), in addition to providing the appropriate tools for engineers and technicians to manage the database to the fullest. 

Some of the tools provided by the database management system to technicians and engineers to enable them to monitor the status and performance of the database, in addition to the creation of backup data and the ability to retrieve them, and some database management systems provide automated techniques to perform certain operations on databases such as reboot the system, Retrieve data and create a record of all operations performed in a given time period. Examples of some database management systems are Oracle Database, MS-Access, MySQL, non-relational databases, NoSQL, PostgreSQL, and Microsoft SQL Server.

Types of databases. 


There are several types of databases classified according to the way in which the data is organized, including Relational database: Invented in 1970, the data is stored in tables containing at least one column which expresses the data class, as well as rows, inputs that include certain data that are the same number of available Columns (s). For example, if the table consists of three columns, name, age, and length, the entry "Name: Mohammed, Age: 20, Length: 170" could be added to this table. SQL is typically used in such databases to manipulate data in them. Distributed database: Databases in this type are distributed in more than one place, or more than one computer, so that the operations performed on the data is scattered or duplicated in different places of the same network, and can be such type of databases The data is homogeneous, so that distributed devices that contain the database are identical to each other in specifications (hardware, operating system, etc.), or heterogeneous (in English: Heterogeneous); Cloud database: This type of database is intended for use in cloud environments, and can be scalable as desired, in addition to keeping the database is continuously accessible. NoSQL: This type of database is intended to deal with a large amount of data that relational databases are not configured to handle. Arrange them according to a specific structure, or those that are distributed across multiple virtual servers.


The importance of databases.

Databases have great importance in different works, and their importance is highlighted in many points, including Databases greatly help to speed up the process of accessing the data they contain. Instead of searching here and there, the necessary data are collected to facilitate access to, process, or employ them in different future work. 

Databases will greatly facilitate the future modification of these data, and will greatly facilitate the necessary updates, as well as the process of scaling or addition. Databases help answer any question or query directly related to the data that has been stored and stored within these databases, at any time. Helps coordinate and aggregate big data hierarchically for easy management and retrieval.

Databases or file system? 


The databases are easy to Store, fast, and minimize unhelpful information. The file system we store in a difficult way requires very much storage space and difficulty in finding the required files quickly and accurately and many others and can go to Google and write in the search engine why to use database To obtain the required information.

The goal of the database? 


The main objective of the database is to highlight the method of organizing data without special applications; by designing the data provided that it is non-repetitive, can be restored, modified, and any additions without any problems, and resort to the use of several methods to reach three levels of abstraction or Normalization models, which are intended to approximate data in terms of structure to Taxonomic nature. Databases have taken an important place in the flow chart of installations and institutions rather than the file system, and this is due to the ease of storage, and availability of space; where you do not need a large storage space, in addition, to ease of use and retrieve data through the language. Reasons for using databases Storage: So that it was difficult to access various information. Space: so that different data is consuming less volume after storing it using this method. Ease of use. Properties of databases the speed.

Easy. Organization. Lack of repetition. Low cost. Connectivity. Integration. Performance and efficiency. Confidentiality and protection of information that may be dangerous at times. Simplicity Reduce surplus and unhelpful information. Diversity in relationships between elements and component data for databases. Searchability.

Installation of databases.

Relational structure: depends on a specific relationship between data elements, such as the value of an element depends on the sum of two elements, which is the most successful structures applied in the world of information databases;. Structure: Contains two common elements and is classified under one or two elements. Hierarchical structure: each element is responsible for only one element and not more.

Database Features.

Quick access and retrieval of data, as this system, make it easy to save and access information with ease in relation to the customer, such as number or name. Provide the huge spaces occupied by the archives. Integration of data, where we can link the banking system with the civil registry, to obtain relevant data for the customer to create the account, and thus the account will be linked to its national record to get the data from a trusted entity. Easier to share digital data compared to paper data. Confidentiality and security in data storage is one of the methods that enable the backup of data, and ensure that the data is not lost in any circumstances compared to the paper system, the small fire in the paper store makes the bank or customer bankrupt. 

Owning reports, where reports make it easier for organizations to study weaknesses and strengths in the work of the organization so that they can develop performance at different levels of accounting, administrative or productivity, and achieve a good profit return.


Query languages.

The query languages (English: Query languages) are programming languages are used to retrieve data from databases and information systems ( in English: Information systems) by sending a camel Inquiry ( in English: Queries) similar to a large extent in English, you can send informative sentences to search for Specific data and Retrieval from databases. Query languages ​​can be used to create, modify, or retrieve data from database management systems. Structured Query language or SQL is an example of query languages. To retrieve all customer data in a company from a table called (customers) in the database, the following sentence (SELECT * FROM customers) is sent to the database management system.

Conclusion:

Now we have discussed the database and all about DBMS. If you are having any question regarding this article or my blog then comment fast. I am waiting for your comments. 

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