Question: How many rows are returned if the GROUP BY clause contains the primary key of a table? can you provide me the sql script with

How many rows are returned if the GROUP BY clause contains the primary key of a table?

can you provide me the sql script with example data and tell me your assumptions.

LEASE LEASE_NUMBER LEASE_DURATION (SEMESTER 1 OR 2 OR 3) STUDENT_ID PLACE ROOM

LEASE LEASE_NUMBER LEASE_DURATION (SEMESTER 1 OR 2 OR 3) STUDENT_ID PLACE ROOM ROOM_NUMBER ADDRESS_OF_ROOM ENTRY_DATE LEAVING DATE foreign key(stu_id) references student entity (stu id) Place_number is unique

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