谢敦华

摘要： 创建表：create table student(sid int primary key,sname varchar(20))创建日志文件：create table log_student(logid int primary key,content varchar(20),updatedate date)创建序列号：create sequence seq start with 1 increment by 1 minvalue 1 maxvalue 10000000 nocycle cache 20;创建触发器：create or replace trigger tr_test before 阅读全文