Zusammenfassung der Ressource
Introduction to Databases
- Data
- raw info
- used in application systems
- online purchases
- elearning
- social media
- File system
- each program
- manages own data
- limitations
- fixed query
- separates data
- duplicates data
- data dependance
- incompatible formats
- DBMS
- database system
- create
- organize
- manages
- Advantage
- Data consistency
- Concurrency
- Backup
- Flexibiity
- Redunduncy control
- Disadvantage
- complexity
- size
- cost
- performance
- DB: structured collection of related info
organized for multiple usage
- components
- people
- hardware
- software
- procedure
- data