Answer:
1st gen: Vacuum Tubes(1940–1956)
2nd gen: Transistors(1956–1963)
3rd gen: Integrated Circuits: (1964–1971)
4th gen: Microprocessors (1971–PRESENT)
5th gen: Artificial Intelligence (present)
Explanation:
Answer:
ALTER TABLE orders
MODIFY (amount DEFAULT 250)
Explanation:
- ALTER TABLE statement is used to modify "amount" column in the existing "orders" table
- MODIFY (amount DEFAULT 250) is used to set the default value 250 of the "amount" column.
Therefore if the supervisor wants the amount column to be configured to accept a default value of 250, then "ALTER TABLE orders MODIFY (amount DEFAULT 250) " statement should be issued.
