Answer:
1958
Explanation:
The term was first published in the 1958 Harvard Business Review when authors Harold J. Leavitt and Thomas C. Whisler said “the new technology does not yet have a single established name. We shall call it Information Technology.”
Answer:
The correct option is option 4 from the options indicated below:
Explanation:
The options are as given below
1-SELECT customer# FROM customers
UNION
SELECT customer# FROM orders;
2-SELECT customer# FROM orders
MINUS
SELECT customer# FROM customers;
3-SELECT customer# FROM orders
INTERSECT
SELECT customer# FROM customers;
4-SELECT customer# FROM customers
MINUS
SELECT customer# FROM orders;
Option 1 is not correct as it will provide the list of all the customers whether they have placed order or not.
Option 2 is not correct as it will provide the list of customers who have placed order but are not in the customers table. This will return the empty records.
Option 3 is not correct as it will provide the list of customers who have placed the order.
Option 4 is correct as it will provide the list of customers from the CUSTOMERS table which are not in the Orders table. thus the list of customers who have not placed the order yet.
Answer:
Optical system. An overhead projector works on the same principle as a slide projector, in which a focusing lens projects light from an illuminated slide onto a projection screen where a real image is formed.
Explanation:
There are only 3 primary colors
Red, Blue and Green are the only Primary colors.
