STRUSTURE OF DATABASE MANAGEMENT SYSTEM

Structure of DBMS

A database is an organized collection of data that is stored and managed in a structured manner. The structure of a database refers to how the data is organized and the relationships between different data elements. The most common type of database structure is known as a relational database, which organizes data into tables.

Here are the key components of a relational database structure:

Tables:






A table is a collection of related data organized into rows and columns. Each table represents a specific entity or concept. For example, in a database for a company, you might have tables for employees, customers, and orders. Each row in a table represents a specific instance of the entity, and each column represents a particular attribute or characteristic of that entity.


Columns and Rows:

                        
            

Also known as fields or attributes, columns represent the specific data elements that are stored in a table. Each column has a name and a data type that defines the kind of data it can store, such as text, numbers, dates, or binary data

Each row in a table represents a single record or instance of the entity being modeled. It contains the actual data values for each attribute defined by the columns.

Primary Key:

                                        

A primary key is a unique identifier for each row in a table. It ensures that each row can be uniquely identified and helps establish relationships between tables. Common examples of primary keys are auto-incrementing numbers or unique IDs assigned to each record.

Auto Increment

Auto Increment is a feature commonly found in database systems that allows for the automatic generation of unique and sequentially increasing values for a particular column in a table. It is often used for primary key columns to ensure each record has a unique identifier.

Relationships:
                


                        


Relationships define the associations between tables in a database. The most common type of relationship is a one-to-many relationship, where one record in a table is associated with multiple records in another table. This is typically achieved by using foreign keys, which are columns in one table that refer to the primary key of another table.


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