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Differentiate between a unique key and a primary key.
- By default, clustered index on column are created by primary key while nonclustered index are created by unique key.
- Primary key doesn't allow NULLs however unique key allows one NULL.
Define Fifth Normal form is concerned with Ans : Fifth Normal form is concerned with Join dependency.
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FDs in Entities : Student entity : Enrolment number → Student name, Address Course Entity :
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Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4
discuss the purpose of the concurrency control?
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