example1:
-- 判断两个时间差大于4个小时
select timestamp '2013-11-11 10:00:00' - timestamp '2013-11-08 12:00:00' > interval '4 hour';
example2:
-- 获取时间差的总体小时差 然后再判断
mrapp=> select extract(day from t) * 24 + extract(hour from t) > 4 from (select (timestamp '2013-12-14 12:00:00' - timestamp '2013-12-11 4:00:00') as t) as a;
其他的都比较麻烦了 暂不列
来源:oschina
链接:https://my.oschina.net/u/1161519/blog/183857