How do You Represent a Weak Entity in a Table? Last Updated : 27 Feb, 2024 Improve Improve Like Article Like Save Share Report Answer: To represent a weak entity in a table, create a primary key with partial key attributes, establish a foreign key, and ensure total participation. A weak entity is represented by a double rectangle in ER diagram in the DBMS. Follow the methods to represent weak entities in a table. Create a Primary Key: Begin by establishing a primary key for the weak entity. This should consist of its partial key attributes along with a discriminator. Identifying Relationship: Implement a strong identifying relationship with the related entity, ensuring that the weak entity’s identity is reliant on the related entity. Partial Key Attributes: Include the partial key attributes in the table, forming part of the primary key. These attributes alone are insufficient for unique identification. Foreign Key: Introduce a foreign key that references the related entity’s primary key. This establishes the connection between the weak entity and the entity on which it depends. Total Participation: Ensure total participation of the weak entity in the identifying relationship, indicating that each instance of the related entity corresponds to an instance of the weak entity. Include Additional Attributes: Add any additional attributes specific to the weak entity in the table, completing its representation. Like Article Suggest improvement Previous Semantic-UI Table Disabled State Next How to Represent Composite Attribute in ER Diagram? Share your thoughts in the comments Add Your Comment Please Login to comment...