Zusammenfassung der Ressource
Database
- File
- Organise Records
- Record
- Group of Fields
- Fields
- Text
- Numbers
- Calculated
- Date/Time
- Graphic
- Flat
- 1 table
- Relational
- Linked tables
- Keys
- Primary
- Unique
- Must have
- Foreign
- links tables relationships
- Avoid Data Duplication
- Search
- Complex
- >1 field
- Simple
- Sort
- Complex
- >1 field
- Validation
- Presence Check
- field not blank
- Restricted Check
- dropdown box
- Field length
- size of field
- Field Range
- range of numbers