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Anonymous

 

Is it possible to change the attributes of a column of a table after it has been loaded 
with data?
 
I wish to make use of some command like ALTER and change the attributes of the column, can I do this?
 
 
 
For ex:- 
 
a column Student_Marks was defined as NOT NULL and later you decided to change it to NOT NULL WITH DEFAULT. 
 
I need this urgently
 
Thanks in advance
Rajat

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