Introduction to SQL
In an SQL SELECT statement querying a single table, according to the SQL-92 standard the asterisk (*) means that:

None of these
all records with even partial criteria met are to be returned.
all columns of the table are to be returned.
all records meeting the full criteria are to be returned.

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Introduction to SQL
Find all the tuples having temperature greater than 'Paris'.

SELECT * FROM weather WHERE temperature > (SELECT temperature FROM weather WHERE city = 'Paris')
SELECT * FROM weather WHERE temperature > (SELECT city FROM weather WHERE city = 'Paris')
SELECT * FROM weather WHERE temperature > 'Paris' temperature
SELECT * FROM weather WHERE temperature > (SELECT * FROM weather WHERE city = 'Paris')

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

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

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

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