CREATE FUNCTION `months_between`(`big_date` date,`small_date` date) RETURNS int(11) BEGIN declare diffMonth int; declare diffYear int; declare diffDay int; declare number int; select month(big_date)-month(small_date) ,day(big_date)-day(small_date) ,year(big_date)-year(small_date) into diffMonth,diffDay,diffYear; if diffMonth > 0 and diffDay >= -1 then set number=diffYear*12 + diffMonth; elseif diffMonth > 0 and diffDay < -1 then set number=diffYear*12 + diffMonth-1; elseif diffMonth < 0 and diffDay > -1 then set number=diffYear*12 - (month(small_date)-month(big_date))+1; elseif diffMonth = 0 and diffDay >= -1 then set number=diffYear*12 ; else set number = diffYear*12 - (month(small_date)-month(big_date)); end if; return number; END
mysql函数-计算两个月份之间的月份
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