2. Overview Flashcards
1
Q
What is a database?
A
A logically coherent collection of data with inherent meaning.
2
Q
When not to use a DB approach?
A
- DB applications not expected to change
- Real-time requirements
- Embedded systems with limited storage
3
Q
Why to use a DB ?
A
- Control over redundancy
- Better consistency of data
- Logical conception of data
- Complex relations of data can be represented
- Personalised view
4
Q
What is Meta-data?
A
The data about data.
Database definition or descriptive information; stored by the DBMS in the form of database catalog
5
Q
Query?
A
Data retrival
6
Q
Transaction ?
A
Data to be read or written in the database
