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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.
What is OCR? OCR (Optical Character Recognition) is a technology that enables you to change different types of machine-readable documents, like scanned paper documents, PDF fil
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In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
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Define Fifth Normal form is concerned with Ans : Fifth Normal form is concerned with Join dependency.
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