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Nick Leeman 2021-10-25 17:01:27 +02:00
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.obsidian/workspace vendored
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"active": "bc6e8ad9aa0f44c3", "active": "bc6e8ad9aa0f44c3",
"lastOpenFiles": [ "lastOpenFiles": [
"School/Development/Primary Key.md", "School/Development/Primary Key.md",
"School/Development/Foreign Key.md",
"School/Development/SQL Database.md", "School/Development/SQL Database.md",
"School/Analyse/OSI Model.md", "School/Analyse/OSI Model.md",
"School/Analyse/Images/OSI-model.png", "School/Analyse/Images/OSI-model.png",
@ -95,7 +96,6 @@
"School/Analyse/Computer Networks.md", "School/Analyse/Computer Networks.md",
"School/Analyse/Comminucation Mediums.md", "School/Analyse/Comminucation Mediums.md",
"School/Analyse/Network Types.md", "School/Analyse/Network Types.md",
"School/Analyse/Network Hardware.md", "School/Analyse/Network Hardware.md"
"School/Analyse/Packet.md"
] ]
} }

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School/Development/Foreign Key.md Normal file
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# Foreign Key
A Foreign key is a [[Constraint]] that protects links between tables.

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School/Development/Primary Key.md
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There can only be ONE primary per table and can consist of multiple attributes (columns). There can only be ONE primary per table and can consist of multiple attributes (columns).
A primary key is **not** required, but highly advised. Even if you don't use it its better to include one in your scheme. There als o
A primary key is **not** required, but highly advised. Even if you don't use it its better to include one in your schema.