Introduction to SQL
Find all the cities whose humidity is 89

SELECT city FROM weather;
SELECT city FROM weather WHERE humidity = 89;
SELECT city WHERE humidity = 89;
SELECT humidity = 89 FROM weather;

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Introduction to SQL
NULL is

not a value
the same as 0 for integer and blank for character
the same as 0 for integer
the same as blank for character

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Introduction to SQL
Find the temperature in increasing order of all cities

SELECT city, temperature FROM weather ORDER BY city;
SELECT city, temperature FROM weather ORDER BY temperature;
SELECT city, temperature FROM weather;
SELECT city FROM weather ORDER BY temperature;

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