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Author Question: Assuming the Quantity column of an ORDER table contains integer data, what does COUNT(Quantity) ... (Read 102 times)

JGIBBSON

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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

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Reply #1 on: Jul 7, 2018
Answer to Question 1

D

Answer to Question 2

TRUE


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