Introduction to SQL
SQL can be used to:

query database data only.
All of these
modify database data only.
create database structures only.

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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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