Question:Which one of the following statements is not correct related to Primary key? 

A A primary key is used as unique identifier for each column 
B A primary key field can never be left empty 
C When working with related tables, the primary key field in one table can be used as foreign key field in another table. 
D None of these 

+ Answer
D 

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Mohammad Towhidul Islam

Editor, VCampus

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