--=	Equal
-->	Greater than
--<	Less than
-->=	Greater than or equal
--<=	Less than or equal
--<>	Not equal. Note: In some versions of SQL this operator may be written as !=
--BETWEEN	Between a certain range
--LIKE	Search for a pattern
--IN	To specify multiple possible values for a column

SELECT * FROM udemy.students WHERE s_grade=90; 

-- # ID, s_name, s_country, s_grade 
-- 1, Richard, Canada, 90