1 SELECT datediff(yy,'2010-06-1 10:10',GETDATE()) --計算多少年 2 SELECT datediff(q,'2011-01-1 10:10',GETDATE()) --計算多少季度 3個月一個季度 3 SELECT datediff(mm,'2011-06-1 10:10',GETDATE()) --計算多少月 4 SELECT datediff(dd,'2011-06-1 10:10',GETDATE()) --計算多少天 5 SELECT datediff(wk,'2011-06-1 10:10',GETDATE()) --計算多少周 6 SELECT datediff(hh,'2011-06-10 10:10','2011-06-10 11:10') --計算多少小時 7 SELECT datediff(n,'2011-06-10 10:10','2011-06-10 10:11') --計算多少分鍾 8 SELECT datediff(ss,'2011-06-10 10:10:00','2011-06-10 10:10:10') --計算多少秒 9 SELECT datediff(ms,'2011-06-16 10:10:10','2011-06-16 10:10:11') --計算多少毫秒