笔记131 计算日期差datediff
笔记131 计算日期差datediff
1 --计算日期差datediff 2 SELECT DATEDIFF(day, '1999/07/19 00:00', '1999/07/23 23:59') 3 4 SELECT DATEDIFF(month, '1987/05/02', '1995/11/15') 5 6 SELECT DATEDIFF(day, '00:00', '23:59') 7 8 SELECT DATEDIFF(month, '1999/07/19', '1999/08/23')