C-06-Q030mediumsingle_mcq
In regular practice, what column is added to serve as the primary key when no suitable column exists?
In regular practice, what column is added to serve as the primary key when no suitable column exists?
- aA 'name' column with text type
- bAn 'id' column with integer type and auto increment
- cA 'phone' column
- dA 'date' column