This ER diagram for the placement agency is known as an Entity-Relationship Diagram, and it is used to analyze the database structure. It displays the connections between entities and their attributes. An ER model facilitates communication. This ER diagram for a placement agency illustrates all of the visual database tables and the relationship between training, company, placements, applicants, and so on. The main entities of the placement agency are placements, training, job, company, college, and applicant. It used structured data to define the relationships between structured data groups of placement cell management system functionalities. The details of the placements are saved in all of the relevant tables.