Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test DBMS Query Language Relational Model
Which of the following is INCORRECT with respect to a primary key in an RDBMS?
1
Values in primary key columns can never be modified or updated.
2
If a row is deleted from the table, its primary key can be assigned to a new row in the future.
3
No two rows can have the same primary key value.
4
More than one of the above
5
None of the above