Which query would be more efficient?1. SELECT *FROM customerWHERE city IN(SELECT cityFROM employeeWHERE reports_to = 2);2. SELECT customer.*FROM customerINNER JOIN employeeON customer.city = employee.cityWHERE reports_to = 2; Both would be the same as both use the same indices for the join and filter.Query #1 would be more efficient as it is based on primary and foreign keys.Query #2 would be more efficient as it is based on primary and foreign keys.Query #1 would be more efficient as it is not using indexed columns.

first one query is more efficient than other SELECT *FROM customerWHERE city IN(SELECT cityFROM…

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Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

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Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Which query would be more efficient?

1. SELECT *
FROM customer
WHERE city IN
(SELECT city
FROM employee
WHERE reports_to = 2);

2. SELECT customer.*
FROM customer
INNER JOIN employee
ON customer.city = employee.city
WHERE reports_to = 2;

Both would be the same as both use the same indices for the join and filter.
Query #1 would be more efficient as it is based on primary and foreign keys.
Query #2 would be more efficient as it is based on primary and foreign keys.
Query #1 would be more efficient as it is not using indexed columns.

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