Describe the three-schema architecture. why do we need mappings between schema levels? how do different schema definition languages support this architecture?
Answers
Answered by
1
UI elements in application code. Other code may just have a "database layer" that completely implements this interface inside the API (and a lot of code will use both a "database layer" API as well as OR mapper tools and libraries).
If you have Some more questions, then contact me at:
Email: [email protected]
Youtube: shorturl.at/mnB57
Similar questions