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What is a relationship called when it is maintained between two entities?
A relationship is called Binary relationship when it is maintained between two entities.
I need help for my Uni assignments
Explain how the associations are implemented as classes. A general approach in this case is to transform an association class into a simple class linked to two original classes
Objectives differentiate DDBMS and conventional DBMS; Describe Network topology for DDBMS; Describe the concepts of horizontal and vertical fragmentation; Descr
Define object-relational systems? Systems that give object-oriented extensions to relational systems are known as object-relational systems.
Two Phase Locking (2PL) The two-phase locking protocol having of two phases: Phase 1 : The lock acquisition phase : If a transaction T needs to read an object, it wants to
What is the purpose of storage manager? The storage manager is responsible for the following a) Interaction with the file manager b) Translation of DML commands in to low
Why is database design important?
exercise solution
What are partial, alternate,, artificial, compound and natural key? Partial Key: It is a set of attributes that can uniquely recognize weak entities and that are related to s
What are composite attributes? Composite attributes can be separated in to sub parts.
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