oracle求时间差的常用函数
oracle求时间差的常用函数求时间差:天:ROUND(TO_NUMBER(END_DATE - START_DATE))小时:ROUND(TO_NUMBER(END_DATE - START_DATE) * 24)分钟:ROUND(TO_NUMBER(END_DATE - START_DATE) * 24 * 60)秒:ROUND(TO_NUMBER(END_DATE - START_DATE) * 24 * 60 * 60)毫秒:ROUND(TO_NUMBER(END_DATE - START_DATE) * 24 * 60 * 60 * 1000)