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discuss the purpose of the concurrency control?
how does Btree differ from a B+ - tree?
(a) Why did SAP introduce the extended star schema?
This assignment concerns the Research database. The database ER model is shown above, where attributes are omitted for clarity. The relational model for the database is: Departm
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
aggregation
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
Insulation between conceptual and physical structures It can be defined as: 1. The Database Administrator should be capable to vary the storage structures without affectin
what is Lossless-join decomposition
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