1795034
Descripción
Mapa Mental por Henry Cookson, actualizado hace más de 1 año
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Creado por Henry Cookson
hace casi 10 años
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Databases
- Flat-file
- Single table of data
- Limited use from one pool of data
- Data redundancy: data can
be entered over and over
again like customer details
for every order
- Data redundancy: data can
be entered over and over
again like customer details
for every order
- Single table of data
- Relational
Databases
- Advantages
- Data redundancy
- Data consistency
- Password access to allow access to
certain areas for certian employees
- Data redundancy
- Two or more tables
- With links
- Primary keys
- Foreign keys
- Primary keys
- With links
- Advantages
- Verification and Validation
- Proof reading
- Double entry
- Proof reading
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