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What Is Relational Database Management System?

What Is Relational Database Management System?

Let's discuss what is a relational database management system also alternately referred to as RDBMS in the database world. In simple terms, the Relational Database Management system is a software application used to create manage and administer relational databases. The RDBMS is a type of database management system specially designed for creating and managing relational databases.

What is a relational database?

The simplest answer to this question is that databases that are based on the relational model are defined as relational databases. To understand the design of a relational database, we must first study the relational model that we are going to discuss in detail in this article.

Some of the most commonly used relational database management systems include MySQL, Oracle, Microsoft SQL Server, and of course there are many popular RDBMS software available in the database market. Before we start the discussion on the relational database management system let us first understand the meaning of the terms data and the database.

What is data?

The data is the most important element of any database management system and therefore it is important to understand the meaning of term data. In the context of a database, the database are created to collect information about some real-world entities. For example, the customer database, students database, and the employee database. 

The term data in the context of DBMS refers to any figure, fact, images, observation, or anything similar that can be recorded & then processed digitally.

The data must be able to be recorded so that the raw data can be processed with the help of a computer system & data processing software.

Let's consider one example the companies generally maintained employee databases to collect data about their employees. The data pertaining to an employee might include name, department, resignation, contact, email. salary, another such information.

Meaning of term database

The database in simple terms is the organized collection of interrelated data that can be efficiently stored accessed and processed. The database offers many advantages as compared to any other form of recordkeeping system. The database is the most efficient way of storing and organizing the data. The database is an important element of most software applications that are designed to store access and process the data with the help of any DBMS software application.

The relational databases are databases that are based on the relational model proposed and developed by computer scientist EF Cord. He was an English computer scientist who proposed and developed a relational database model.

What is a relational database management system?

The term or RDBMS stands for Relational Database Management System which is software designed to perform various operations on the relational databases. The database operations that can be performed by using our DBMS include creating new databases, organizing the data in various tables, defining relations between the tables administering managing, and manipulating the databases.

The database manipulation operations include creating new databases and tables, modifying the table structure, adding and deleting the data in the table, and other such user-specified database operations. The RDBMS internally might consist of a group of programs. Each of these programs performs different tasks related to database management.

Some of the most commonly used are RDBMS includes MySQL, Oracle, Microsoft SQL Server, IBD DB2, Microsoft Access, Maria DB, MongoDB, Bose SQL and there are many more RDBMS available in the market. The MySQL RDBMS is extensively used for providing server-based database functionality to websites and web applications. The RDBMS also provides the needed tools required for the design & development of relational databases.

The relational database management system is a default choice and vital component of most software applications.

The internal logical structure of the relational databases

In a relational database model, the database is logically organized as a group of interrelated tables. Each database entity is represented by a table in the database. Each table can have columns and multiple rows. A table is a collection of records & represents a database entity. Each row in the table represents a record a table row which is also alternately referred to as a tuple or a row. The intersection of columns and rows is referred to as the data field. Each data field can be uniquely identified with reference to the respective row and column. Each row in the table consists of the number of data fields. The columns in the table represent some attributes for an entity. Each table column is identified with a unique name whereas each row in the table is uniquely identified with the help of a database key called the primary key.

In relational databases, the relationships between the tables are defined by using a primary key and the foreign key.

Understand the importance of database design skills for programmers and software developers

Whether you are working on an enterprise software development project or you may be developing a small website the database design and development skills are needed in almost all software applications and therefore the database design and development knowledge is important for programmers and software developers.

Software professionals with database design skills are the highest-paid professionals in the job market.

The database communication language

SQL. The database management system internally makes use of database query language such as SQL. SQL stands for the structured query language. SQL is a standard database query language supported by almost all RDBMS based on the relational model. It is a SQL database query language used by software applications to communicate with the database management system.

The RDBMS in turn communicates with the database and performs the desired database operation. The database is managed by the RDBMS whereas the database actually stores the data.

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