Zusammenfassung der Ressource
information handling software
- Benefits of databases
- Fast access to data
- Easy to edit data
- Can validate data
- Can create reports
- Can share database with users
- Security (passwords)
- Validation methods
- Range check
- Type check
- Length check
- Lookup list
- Picture/format check
- Presence check
- Check if data has been entered
- Data has a particular pattern the computer
compares it to other accepted records
- compare with a list of allowed answers
- No. characters used is reasonable
- Correct data type (text/number)
- Data entered in a sensible range
- Security issues
- consequences
- Loss of customers
- Payments for goods not recieved
- Bad publicity
- Cash flow problems
- Management cannot make decisions
due to lack of information
- Secure data:
- Cannot be destroyed
- Cannot be
accidentally/purposefully changed
- Cannot fall into the hands of
unauthorised personel
- How to keep data secure
- Password systems
- Back-ups
- File attributes (read only files)