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Question 
Is it possible to allow NULL values in foreign key?
I s it possible to use different constraints for the same
column in the table
(i.e) (id int NOT NULL,UNIQUEUE)
 Question Submitted By :: Elumalai.k
I also faced this Question!!     Rank Answer Posted By  
 
  Re: Is it possible to allow NULL values in foreign key? I s it possible to use different constraints for the same column in the table (i.e) (id int NOT NULL,UNIQUEUE)
Answer
# 1		 
Yes, it is possible to allow NULL values in a foreign key, 
this property has a relation with the another property "ON 
UPDATE/DELETE SET NULL".
It is also possible to define multiple constraints on a 
single column.
 
Is This Answer Correct ?    1 Yes 0 No
Uma
 

 
 
 
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