Question:There is a column c1 in the table t to which a primary key pk is to be added. What will be the correct syntax? 

A Alter table t add primary key(c1); 
B Alter table t add constraint pk primary key(c1); 
C Alter table t add (constraint pk primary key(c1)); 
D Alter table t add pk constraint primary key(c1); 

+ Answer
A B 

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Md. Habib Ullah

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