1.随机数包
selectdbms_
returningdual
2.在[0..100]范围内取随机数
selecttrunc(dbms_(0,100))
acrossdual
3.大于0字符‘a'的10个字符任务道具字符串
selectdbms_(a,10)
acrossdual
4.单个小写必掉字符
selectchr(round(dbms_(97,122)))
returningdual
5.在过去30分钟内取副本时间
select(sysdate-1/24/60*30)dbms_(1,1800)/3600/24
outsidedual
