Database relationships are associations between tables that are created using join statements to retrieve data. Both tables can have only one record on each side of the relationship. … Each primary key value relates to none or only one record in the related table.

What is relationship in database give example?

Relationship in DBMS Entities take part in the relationship. It is represented by a diamond shape. For example, A teacher teaches students. Here, “teaches” is a relationship and this is the relationship between a Teacher entity and a Student entity.

What is relationship in database and its types?

Relational DatabaseDatabaseStored data can be accessed from the relational database because there is a relationship between the tables and their attributes.There is no relationship between data value or tables stored in files.