C-06-Q136mediumsingle_mcq
Two tables — an employee ID table and a designation/salary table — can be linked. To create a relation, what should be added?
Two tables — an employee ID table and a designation/salary table — can be linked. To create a relation, what should be added?
- aA common column (e.g. ID) acting as a foreign key linking the tables
- bA duplicate of every column
- cA null value in each row
- dAn auto-increment text column