CREATE CUSTOM FUNCTION IN MYSQL , Get count of weekdays between 2 dates
We will be able to create as many functions as we can in using Create Functions. This will be Helpful when you need to perform a Calculations. Here I have an Example to get the count of weekdays between 2 dates.
Get Count days by adding days to the current
DROP FUNCTION IF EXISTS `getCountdays` $$
CREATE FUNCTION `getCountdays` (start_date DATE, date_count INT)
RETURNS INT DETERMINISTIC
BEGIN
DECLARE remainder INT;
DECLARE date_sequence DATE;
DECLARE dayz INT;
DECLARE week_day INT;
SET remainder = 0;
SET dayz = 0;
read_loop: LOOP
IF remainder= date_count THEN
LEAVE read_loop;
END IF;
SELECT DATE(DATE_ADD(start_date, INTERVAL 1 DAY)) INTO date_sequence;
SELECT WEEKDAY(DATE_ADD(start_date, INTERVAL 1 DAY)) INTO week_day;
IF week_day < 5 THEN
SET dayz = dayz + 1;
END IF;
SET remainder = remainder + 1;
SET start_date = date_sequence;
END LOOP;
RETURN dayz;
END $$
DELIMITER ;
SELECT getCountdays('2013-02-20',30); // 30 is the days you need to add with the current date
With a slight change in this Example you can create function for between two dates
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