weixin_41914853的博客

http://blog.itpub.net/31015730/viewspace-2147932

1.触发器create [or replace] trigger tri_name[before | after | instead of] tri_eventon table_name | view_name | user_name | db_name[for each row] [when tri_condition]beginplsql_sentences;end tri_name;实例：c...

建表：/***学生表********************************************************/create student( //创建学生表sno varchar2(10) primary key,sname varchar2(2),sage number(2),ssex varchar2(5));insert into student values ('s...