1.

Which is the correct SQL syntax from the following to create a PRIMARY KEY constraint on existing table EMPLOYEE on " EMPID " column and currently column does not contain any value?

A. Alter table EMPLOYEE Add Constraint PK - EMPID Primary Key, EMPID;
B. Update table EMPLOYEE Add Constraint PK - EMPID Primary Key (EMPID);
C. Alter table EMPLOYEE Add Constraint PK - EMPID Primary Key (EMPID);
D. Alter table EMPLOYEE Add Constraint PK - EMPID Primary Key, (EMPID);
Answer» D. Alter table EMPLOYEE Add Constraint PK - EMPID Primary Key, (EMPID);


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