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.
Press CTRL + X to cut the file(s) and folder(s) you wish to move from your desktop.
Go to your destination (where you would like to move them to), and press CTRL + V to paste them there.
Answer:
HTML Link Colors
By default, a link will appear like this (in all browsers):
An unvisited link is underlined and blue
A visited link is underlined and purple
An active link is underlined and red
You can change the link state colors, by using CSS:
Answer:
load balancer.
Explanation:
Based on the scenario being described within the question it can be said that you are being asked to install a load balancer. This is a device that behaves as a reverse proxy in order to correctly and efficiently distribute all the network traffic across various servers in order to increase the amount of users that can use the server at the same time.
