which columns would you recommend to be indexed

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Given the following SQL Query, which columns would you recommend to be indexed?

SELECT

InvoiceNumber, InvoiceDate, Invoice_Total, Invoice_Paid,

 

Invoice_Total - Invoice_Paid as Balance

 

FROM Invoice

 

WHERE Invoice_Date >= "2015-07-20" and Salesman_Id = "JR"

 

ORDER BY DESC Invoice_Total

Drag the correct answers to one of the three pockets.

Invoice_paid     InvoiceNumber     Invoice_Date     Invoice_Total     SalesMan ID        


 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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