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CREATE FUNCTION FN_CNT_Working_days(StartDate DATE, EndDate DATE) RETURNS INT BEGIN DECLARE WORKING_DAYS INT; SELECT (DATEDIFF(EndDate, DATE(CONCAT(YEAR(EndDate), '-', MONTH(EndDate), '-', 16))) + 1) -(FLOOR(DATEDIFF(EndDate, DATE(CONCAT(YEAR(EndDate), '-', MONTH(EndDate), '-', 16)))/7) * 2) -(CASE WHEN DAYNAME(DATE(CONCAT(YEAR(EndDate), '-', MONTH(EndDate), '-', 16))) = 'Sunday' THEN 1 ELSE 0 END) -(CASE WHEN DAYNAME(EndDate) = 'Saturday' THEN 1 ELSE 0 END) + (DATEDIFF(DATE(CONCAT(YEAR(EndDate), '-', MONTH(EndDate), '-', 15)), StartDate) + 1) -(FLOOR(DATEDIFF(DATE(CONCAT(YEAR(EndDate), '-', MONTH(EndDate), '-', 15)), StartDate)/7)) -(CASE WHEN DAYNAME(StartDate) = 'Sunday' THEN 1 ELSE 0 END) INTO WORKING_DAYS; RETURN (WORKING_DAYS); END
SELECT FN_CNT_Working_days('2019-10-01', '2019-10-31');
FN_CNT_Working_days('2019-10-01', '2019-10-31')
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