What is the significance of relationships in an ERD?

In an Entity-Relationship Diagram (ERD), relationships signify the associations between entities. They define how entities are connected or related to each other in the database schema. These relationships are crucial for understanding the structure of the database and how data is organized. By establishing relationships, it becomes easier to maintain data integrity and establish constraints such as referential integrity. Understanding relationships aids in designing efficient database schemas and querying data effectively.