ICT - Unit 11
- Created by: BethScott
- Created on: 13-04-15 16:39
View mindmap
- Unit 11
- Flat files
- One or more unrelated tables
- Record, field and file
- Unit 11
- Flat files
- One or more unrelated tables
- Record, field and file
- Simple lists
- Problems
- Large amounts of duplicated data
- Data entry slower
- Uses disk space
- Reduced data integrity
- Data input errors
- Inconsistent data entry
- Difficult to update
- Security
- Program-data dependence
- 5 main data types
- Numeric
- Date
- Boolean
- Text
- Character
- RDBMS
- More complex database that stores data in multiple tables that are interrelated
- Benefits
- Reduced redundancy
- Improved data consistency
- Improved data integrity
- Better security
- Program-data independence
- Primary and secondary key
- Flat files
- Unit 11
- Simple lists
- Problems
- Large amounts of duplicated data
- Data entry slower
- Uses disk space
- Reduced data integrity
- Data input errors
- Inconsistent data entry
- Difficult to update
- Security
- Program-data dependence
- 5 main data types
- Numeric
- Date
- Boolean
- Text
- Character
- RDBMS
- More complex database that stores data in multiple tables that are interrelated
- Benefits
- Reduced redundancy
- Improved data consistency
- Improved data integrity
- Better security
- Program-data independence
- Primary and secondary key
- Flat files
Similar ICT resources:
Teacher recommended
Comments
No comments have yet been made