This topic contains a solution. Click here to go to the answer

Author Question: You have been given two tables, CUSTOMER and SALE. You want to check the referential integrity ... (Read 77 times)

eruditmonkey@yahoo.com

  • Hero Member
  • *****
  • Posts: 546
You have been given two tables, CUSTOMER and SALE. You want to check the referential integrity constraint: SALE.CustomerNumber must exist in CUSTOMER.
 
  CustomerNumberYou run the following SQL query:SELECT CustomerNumberFROM SALEWHERE CustomerNumber NOT IN (SELECT CustomerNumber FROM CUSTOMER);What is shown in the results of this query?A) All values of CustomerNumber that match the constraint.
  B) All values of CustomerNumber that violate the constraint.
  C) All values of CustomerNumber where
  SALE.CustomerNumber = CUSTOMER.CustomerNu mber.
  D) All values of Customer number that are in CUSTOMER but not in SALE.

Question 2

In two-phase locking, all locks are obtained during the growing phase.
 
  Indicate whether the statement is true or false



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

connor417

  • Sr. Member
  • ****
  • Posts: 329
Answer to Question 1

B

Answer to Question 2

TRUE




eruditmonkey@yahoo.com

  • Member
  • Posts: 546
Reply 2 on: Jul 7, 2018
Great answer, keep it coming :)


smrtceo

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

Did you know?

The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

For a complete list of videos, visit our video library