B
Explanation:
The Alter command is used when we want to modify a database or object contain in database.
Configure the Internet connection.
Configure the wireless router.
Enable NAT.
Configure DHCP
Secure the SOHO network.
Explanation:
It's placed near the door. When a visitor presses the button, the bell rings inside alerting you that someone is at the door.
Answer:
Join
Explanation:
Five basic set operators in relational algebra are as follows:
- Selection - tuple selection
- Projection - extract columns
- Cartesian product - cross product of relations
- Set union - union of two relations
- Set difference - minus operation on two relations
As we can see, Join is not part of the basic set operations but it is implemented using the Cartesian Product operator.
