Page 11 - الحاسب الآلي ثانية إرشاد 2

‫أﻧﻈﻤﺔ ﻗﻮاﻋﺪ اﻟﺒﻴﺎﻧﺎت‬ ‫اﻟﻔﺼﻞ اﻷول‬

‫ ﺒﻤﻌﻨﻰ‬N Y Logical
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OLE

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-

Underscore

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Schema

Data

relation schema schema ‫ ﻴﺴﻤﻲ‬Model

entities

Relational model

relation

: schema‫ﻟﻠـ‬

Students (sid: string, name: string, login: string, age: integer, gpa: real)

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