ER Diagram
8/23/2026
ER diagram showing many-to-many relationships resolved with junction tables: STUDENT and COURSE through ENROLLMENT, COURSE and INSTRUCTOR through COURSE_INSTRUCTOR, and CLUB memberships through CLUB_MEMBERSHIP.
entity relationship diagrammany-to-many relationshipjunction tablestudent enrollmentcourse instructorclub membership
ER Diagram
8/23/2026
Entity-relationship diagram showing one-to-many links between authors and posts, categories and posts, and posts and comments. It models a simple publishing database with four entities: AUTHOR, CATEGORY, POST, and COMMENT.
entity relationship diagramone-to-manydatabase schemapublishing systemblog data model
Class Diagram
8/23/2026
Class diagram for an online bookstore domain showing customers, accounts, shopping carts, orders, books, authors, publishers, payments, and reviews, with cart and order line items linking products to purchases.
class diagramdomain modelonline bookstoree-commerceordersbooks