What is a relational diagram give an example?

What is a relational diagram?

An entity relationship diagram (ERD), also known as an entity relationship model, is a graphical representation that depicts relationships among people, objects, places, concepts or events within an information technology (IT) system.

What is an example of relational?

Popular examples of standard relational databases include Microsoft SQL Server, Oracle Database, MySQL and IBM DB2. Cloud-based relational databases, or database as a service, are also widely used because they enable companies to outsource database maintenance, patching and infrastructure support requirements.

What is relational database give an example?

Let's use a digital storefront as an example. Our database might have a table containing customer information, with columns representing customer names or addresses, while each row contains data for one individual customer. These tables can be linked or related using keys.

What is a relationship and what three types of relationships exist give an example of each of the three types of relationships?

A relationship describes association among entities. For example, a relationship exists between customers and an agent, in that an agent can serve many customers and each customer may be served by only one agent. Data Models use three types of relationships: one-to-many, many-to-many, and one-to-one.