496944
Beschreibung
Mindmap von CGreen1997, aktualisiert more than 1 year ago
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Erstellt von CGreen1997
vor fast 11 Jahre
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Keys
- Primary Key
- A field in a database used to identify a
record e.g. exam number, NI number etc.
- A field in a database used to identify a
record e.g. exam number, NI number etc.
- Foreign Key
- This is how tables link
together in a relational
database.
- A foreign key is a field in a table that is a primary key in a different table.
- This is how tables link
together in a relational
database.
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