Assuming the Quantity column of an ORDER table contains integer ...

[JGIBBSON]

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]

Answer to Question 1

D

Answer to Question 2

TRUE