What is a Database?

The use of the Internet has expanded greatly in the recent period, due to the great development in the field of the Internet and the technology associated with it. The Internet has become an important source for exchanging, transferring, and largely storing data. The Internet facilitates access to data at any time and provides high data protection.

 

What is a Database?

From this standpoint came the need to develop a data portfolio so that this data could be used smoothly and effectively, and from here the idea of database emerged.

 

 

Databases

    A database is similar to a record of employee data maintained by the human resources department in any company. Therefore, databases are logical tables that are interconnected with each other through one of the logical relationships that are written and designed using a specific programming language.

 

 

Each database table consists of several fields that are linked together logically to facilitate the retrieval and request of this data when needed using specific programming commands.

 

 

Data is very necessary, especially in our current time, as processing data will produce results at a high speed for business owners, and thus, through this data, they can make the appropriate decision-making process for the nature of any situation in their work environment.

 

 

What programming languages are databases written in?

Databases are usually written using different languages and programs such as MySQL, Microsoft Access for data processing, PHP, Python, etc. Databases can also be built using different environments such as Oracle, Firebird, informixing, and so on.

 

The most popular database languages

One of the most famous languages for writing database is MySQL, or SQL, which is an abbreviation for Structured Query Language. This language has a set of commands that it gives, and these commands can be divided into three groups:

1. DML is for data processing and gives the following commands: (Select, used to retrieve records - Insert, to create records - Delete, to delete records - Update, to modify records).
2. DDL is specific to the process of defining data and gives the following instructions and commands: (Create to create a table - Drop to delete the table - Alter to modify the table).
3. DCL is specific to the data control process and gives the following commands: (Grant grants privileges to users - Revoke takes away privileges from users).

 

 

The importance of databases

Databases are of great importance due to their frequent use in various businesses and fields, and in the following points we will explain the importance of databases:

1.  Databases work to speed up and facilitate access to information and the data they contain, as data and information are completely collected in one place and in different classifications. 
2. When needed, search and filtering are done, greatly facilitating access to data. For this reason, database technology has been employed to arrange work, organize data, and facilitate and speed up access. to her at any time.
3. One of the advantages of databases is that they greatly allow for the process of modifying data in the future and when needed. Updates can be made to this data from time to time, and deletions, additions, etc. can be performed.
4. Databases facilitate the management of data, no matter how huge, as they can be arranged hierarchically, which facilitates the process of managing and retrieving it when needed.
5. Using this technology, it is possible to obtain answers to any questions or inquiries related to the stored data.

 

Which is better for storing data, databases, or files?

Unlike file storage systems, database excel in facilitating the process of saving data and quickly accessing it, as well as working to reduce unnecessary information and unimportant data. 

As for the file system, it first requires a very large storage space, and there is difficulty in finding the files that are used to save data and a very great difficulty in the process of finding and extracting certain data from within files.

 

What are databases composed of?

There are three main structures in database architecture, detailed as follows:

• Relational structures

These combinations depend on a set of specific elements from a group of different (data) elements. For example, one of the elements has a value that depends on mathematical operations performed on the other elements.

 

• Structural installations

This structure depends on the organizational relationships that exist between the elements and that link the different data.

 

• Hierarchical structures

Hierarchical structures depend on the hierarchical relationship that exists between the elements. For example, several graphic elements fall under a specific element, so they are its branches or its classification.

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