« previous next »

Author Question: Assuming the Quantity column of an ORDER table contains integer data, what does COUNT(Quantity) ... (Read 61 times)

JGIBBSON

  • Hero Member
  • *****
  • Posts: 538
on: Jul 7, 2018
Assuming the Quantity column of an ORDER table contains integer data, what does COUNT(Quantity) compute?
 
  A) The number of rows in the ORDER table
  B) The number of non-zero values in the Quantity column
  C) The number of distinct values in the Quantity column
  D) The number of non-null values in the Quantity column

Question 2

An important improvement of XML Schema over DTDs is that XML Schemas are themselves XML documents.
 
  Indicate whether the statement is true or false


tdewitt

  • Sr. Member
  • ****
  • Posts: 318
Reply #1 on: Jul 7, 2018
Answer to Question 1

D

Answer to Question 2

TRUE


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

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?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Column chromatography Column chromatography
Attributed to Apollodorus, Column of Trajan, Rome. Attributed to Apollodorus, Column of Trajan, Rome.
How to graph line equations without a table of values How to graph line equations without a table of values
Knead the calf muscles with both hands. Place the foot flat on the table, knee bent. Reach behind ... Knead the calf muscles with both hands. Place the foot flat on the table, knee bent. Reach behind ...
Gamete genotype frequencies calculated from genetic linkage data Gamete genotype frequencies calculated from genetic linkage data
Ribosome structure and tRNA-binding sites interpreted from cryo-EM–generated data Ribosome structure and tRNA-binding sites interpreted from cryo-EM–generated data
Video: Sigmoidoscopy

For a complete list of videos, visit our video library