تماشای ویدئو Entity Relationship Diagram Tutorial ER Diagram Tutorial Part 1 از آی-ویدئو

Entity-Relationship Diagram Tutorial An Entity-Relationship diagram (ERD) typically serves as the main deliverable of a conceptual data model. While newer approaches to E-R modeling have developed, the E-R approach is still cited by some professionals as "the premier model for conceptual database design". An ERD is a logical representation of an organization's data, and consists of three primary components: Entities -- Major categories of data and are represented by rectangles Attributes --
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