Introduction to SQL
The HAVING clause does which of the following?

Acts EXACTLY like a WHERE clause.
Acts like a WHERE clause but is used for groups rather than rows.
Acts like a WHERE clause but is used for rows rather than columns.
Acts like a WHERE clause but is used for columns rather than groups.

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Introduction to SQL
Find the name of all cities with their temperature, humidity and countries.

SELECT city, temperature, humidity, country FROM location;
SELECT weather.city, temperature, humidity, country FROM weather, location WHERE weather.city = location.city;
SELECT weather.city, temperature, humidity FROM weather SELECT country FROM location WHERE weather.city = location.city;
SELECT weather.city, temperature, humidity, country FROM weather, location;

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Introduction to SQL
Which of the following query is correct for using comparison operators in SQL?

None of these
SELECT name, course_name FROM student WHERE age>50 and WHERE age<80;
SELECT name, course_name FROM student WHERE age>50 and age <80;
SELECT name, course_name FROM student WHERE age>50 and <80;

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