How to get days between two dates in mysql? code example

Example 1: 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 2: select amount weeks between two dates mysql

##syntax: FLOOR(DATEDIFF(DATE(column_end_date), DATE(column_ini_date))/7)

Select FLOOR(DATEDIFF(DATE(20090215), DATE(20090101))/7);