DIFF BETWEEN PRIMARY KEY AND PRIMARY INDEX - response (2) by KS42982

If you are absolutely looking for the differences then below are few -

PRIMARY KEY PRIMARY INDEX

1 It cannot be NULL It can be NULL
2 It is not mandatory in Teradata It is mandatory in Teradata
3 It does not help in data distribution It helps in data distribution
4 It has to be unique It can be unique or non-unique
5 It is logical implementation It is physical implementation
6 It cannot be changed It can be changed.