mysql select difference between two dates in days code example

Example 1: mysql date between two dates

-- With implicit CAST
SELECT * FROM my_table 
	WHERE my_date BETWEEN '2021-06-01 01:12:00' AND '2021-06-30 23:59:59';
-- is EQUIVALENT to
SELECT * FROM my_table 
	WHERE my_date >= '2021-06-01 01:12:00' AND my_col <= '2021-06-30 23:59:59';

Example 2: mysql datediff days

#Get date diff in days
select DATEDIFF('2020-04-13', '2020-04-20');#returns -7
select DATEDIFF('2020-04-20', '2020-04-13');#returns  7

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