Introduction to SQL
A view is which of the following?

A virtual table that can be accessed via SQL commands
A base table that cannot be accessed via SQL commands
A base table that can be accessed via SQL commands
A virtual table that cannot be accessed via SQL commands

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

SELECT country FROM location WHERE condition = 'sunny';
SELECT country FROM location WHERE city UNION (SELECT city FROM weather WHERE condition = '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');

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