Problems 1 and 2 are based on the following query:   SELECT         EMP_LNAME, EMP_FNAME, EMP_AREACODE, EMP_SEX FROM            EMPLOYEE WHERE         EMP_SEX = ‘F’ AND EMP_AREACODE = ‘615’ ORDER BY   EMP_LNAME, EMP_FNAME;   What is the likely data sparsity of the EMP_SEX column? What indexes should you create? Write the required SQL commands.

Database Systems: Design, Implementation, & Management
11th Edition
ISBN:9781285196145
Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Chapter11: Database Performance Tuning And Query Optimization
Section: Chapter Questions
Problem 2P: Problem 1 and 2 are based on the following query: SELECT EMP_LNAME, EMP_FNAME, EMP_AREACODE, EMP_SEX...
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Problems 1 and 2 are based on the following query:

 

SELECT         EMP_LNAME, EMP_FNAME, EMP_AREACODE, EMP_SEX

FROM            EMPLOYEE

WHERE         EMP_SEX = ‘F’ AND EMP_AREACODE = ‘615’

ORDER BY   EMP_LNAME, EMP_FNAME;

 

  1. What is the likely data sparsity of the EMP_SEX column?
  2. What indexes should you create? Write the required SQL commands.

 
 
 
 
 
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