Introduction to SQL
............. joins two or more tables based on a specified column value not equaling a specified column value in another table.

OUTER JOIN
EQUIJOIN
NON-EQUIJOIN
NATURAL JOIN

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

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

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