Introduction to SQL
Find the name of cities with all entries whose temperature is in the range of 71 and 89

SELECT * FROM weather WHERE temperature NOT BETWEEN 71 to 89;
SELECT * FROM weather WHERE temperature NOT IN (71 and 89);
SELECT * FROM weather WHERE temperature BETWEEN 71 AND 89;
SELECT * FROM weather WHERE temperature NOT IN (71 to 89);

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Introduction to SQL
Find the names of the countries whose condition is sunny.

SELECT country FROM location WHERE city NOT IN (SELECT city FROM weather WHERE condition = 'sunny');
SELECT country FROM location WHERE city IN (SELECT city FROM weather WHERE condition = sunny');
SELECT country FROM location WHERE condition = 'sunny';
SELECT country FROM location WHERE city UNION (SELECT city FROM weather WHERE condition = 'sunny');

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