Select from following answers:- Alter Table Table_Name Add Check ([Col_Name] Is Not Null);
- Alter Table Table_Name Alter Check ([Col_Name] Is Not Null);
- Alter Table Table_Name Modify Constraint ([Col_Name] Is Not Null);
- All of the above.
- All Above
Alter Table Table_Name Add Check ([Col_Name] Is Not Null) is the correct syntax for creating a check constraints on an existing tables.
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