Infosys Question:
Explain the different levels of database schema of Infosys?
Answer:
✰ Conceptual schema- a map of concepts and their relationships.
✰ Logical schema- a map of entities and their attributes and relations
✰ Physical schema- a particular implementation of a logical schema
✰ Schema object- Oracle database object
✰ Logical schema- a map of entities and their attributes and relations
✰ Physical schema- a particular implementation of a logical schema
✰ Schema object- Oracle database object
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