date difference in mysql code example

Example 1: mysql date diff

SELECT DATEDIFF(expr1,expr2) as difference_in_days;


select DATEDIFF('2020-05-15', '2020-05-10'); //returns 5
select DATEDIFF('2020-05-13', '2020-05-16'); //returns -3
select DATEDIFF('2020-06-30', '2020-05-30'); //returns 30

Example 2: mysql date between two dates

ex1:
SELECT * FROM `objects` 
WHERE  (date_field BETWEEN '2010-01-30 14:15:55' AND '2010-09-29 10:15:55')

ex2:
WHERE 
   requireddate BETWEEN 
     CAST('2003-01-01' AS DATE) AND 
     CAST('2003-01-31' AS DATE);

Example 3: 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