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Ultimate Entity Relationship Diagram Tutorial (ER Diagrams)
WebEntity-relationship (ER) diagrams are the blueprints for database applications in OLTP systems. The process of creating ER diagrams is well documented and involves: … Web1 Entity Relationship Diagram (ERD) - Exercises Exercise 1 Draw an ER diagram for the following application from the hospital: A doctor has one or more patients to treat Each doctor has an unique Doctor ID Each patient has a name, phone number, address and date of birth Patient entity is a weak entity Age is a derived attribute Exercise 2 Draw an ER … symptoms of herpes recurrence
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