SQL:> select numtodsinterval(365, 'second') from dual;
结果：+000000000 00:06:05.000000000;
SQL:> select SUBSTR(numtodsinterval(365, 'second'),12,8) from dual;
结果：00:06:05;
SQL:> select to_char(to_date('1000 ', 'sssss '), 'hh24:mi:ss ') from dual;
结果：00:16:40 ;
SQL:>select trunc(30682/3600) || '小时' || to_char(to_date(mod(30682,3600),'sssss'),'fmmi"分"ss"秒"') from dual;
结果：8小时31分22秒;
//注意：以上转换的都只能是在24小时以内
SQL:>select trunc(3601*24/3600/24) || '天' || to_char(to_date(mod(3601*24,3600*24),'sssss'),'fmhh24"小时"mi"分"ss"秒"') from dual;
结果：1天0小时0分24秒;
作者 sangei
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