Answer:
A primary key is utilized to guarantee the information in the particular segment is interesting. A foreign key is a section or gathering of segments in a social data set table that gives a connection between information in two tables. It particularly recognizes a record in the social information base table.
Answer:
Remove
Explanation:
A method that deletes an item from a list using the item’s value is "Remove"
The "remove () function in python language indicates the specific element or character to be that needs to be removed.
For example
myList = ["Jane",16,34,52,"Lamar",13,27,20]
myList.remove(34)
myList
OUTPUT : ["Jane",16,52,"Lamar", 13,27,20]
Therefore, by printing the list using the print(), we can observe that the element 34 has been removed from myList.
Hence, the correct answer, in this case, is " Remove."
<span>A subset of new media in which groups and their fans can interact directly is referred to as social media.
</span>Social media is a computer-based technology that can p<span>rovide radically different social actions.Examples include: twitter, instagram, facebook.
</span>Social media is very influential so it is becoming a very important part of marketing.
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.
