MySQL Timediff 计算晚上 10 点到早上 6 点之间的小时数

Question

SELECT 
        (time_to_sec(
            timediff('2011-01-26 23:51:20', 
                     '2011-01-26 15:51:10')
            ) /60 /60) 
    AS totalhours

总小时数是 8。我必须怎么做才能让它只计算晚上 10 点到早上 6 点之间的小时数？

Answer 1

如果你使用它肯定更简单:

SELECT hour(timediff('2011-01-26 23:51:20', 
                     '2011-01-26 15:51:10'))
    AS totalhours