Introduction to SQL
Which of the following is illegal?

None of these
SELECT SYSDATE - (SYSDATE + 2) FROM DUAL;
SELECT SYSDATE - SYSDATE FROM DUAL;
SELECT SYSDATE - (SYSDATE - 2) FROM DUAL;

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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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Introduction to SQL
Find all the cities with temperature, condition and humidity whose humidity is in the range of 63 to 79

SELECT * FROM weather WHERE humidity IN (63 to 79)
SELECT * FROM weather WHERE humidity NOT BETWEEN 63 AND 79
SELECT * FROM weather WHERE humidity BETWEEN 63 AND 79
SELECT * FROM weather WHERE humidity NOT IN (63 AND 79)

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Introduction to SQL
Find the names of these cities with temperature and condition whose condition is neither sunny nor cloudy

SELECT city, temperature, condition FROM weather WHERE condition IN ('sunny', 'cloudy');
SELECT city, temperature, condition FROM weather WHERE condition NOT IN ('sunny', 'cloudy');
SELECT city, temperature, condition FROM weather WHERE condition BETWEEN ('sunny', 'cloudy');
SELECT city, temperature, condition FROM weather WHERE condition NOT BETWEEN ('sunny', 'cloudy');

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