Search results with tag "Relational schema"
Conceptual Design Using the Entity-Relationship (ER) Model
pages.cs.wisc.edu– A database `schema’ in the ER Model can be represented pictorially (ER diagrams). – Can map an ER diagram into a relational schema. Schema Refinement: (Normalization) Check relational schema for redundancies and related anomalies. Physical Database Design and Tuning: Consider typical workloads and further refine the database design.
ER & EER to Relational Mapping
tinman.cs.gsu.edurelationship into a relational schema you must use one of the four options available. Let C be the super-class, K its primary key and A. 1, A. 2, …, A. n. its remaining attributes and let S. 1, S. 2, …, S. m. be the sub-classes. Chapter 9 11. Option 8A (multiple relation option):
Translation of ER -diagram into Relational Schema
cis.csuohio.edu• Utilize a recursive foreign key – A foreign key in a relation that references the primary key values of that same relation – Unary M:N Relationships • Create a separate relation • Primary key of new relation is a composite of two attributes that both take their values from the …