-- value带有两个参数,第一个指下限,第二个指上限,将会生成下限到上限之间的数字,但不包含上限.select ceil(dbms_random.value(1000,9999)) from dual; select substr(cast(dbms_random.value as varchar2(38)),2,4) from dual; select floor(dbms_random.value(0,100)) from dual; select round(dbms_random.v
Facebook Hacker Cup 2014 Qualification Round比赛Square Detector题的解题报告.单击这里打开题目链接(国内访问需要那个,你懂的). 原题如下: Square Detector Problem Description You want to write an image detection system that is able to recognize different geometric shapes. In the first ver