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 <80;
SELECT name, course_name FROM student WHERE age>50 and age <80;

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Introduction to SQL
To define what columns should be displayed in an SQL SELECT statement:

use USING to name the source table(s) and list the columns to be shown after WHER
use SELECT to name the source table(s) and list the columns to be shown after USING.
use USING to name the source table(s) and list the columns to be shown after SELECT.
use FROM to name the source table(s) and list the columns to be shown after SELECT.

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

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

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