摘要：create or replace procedure pro_droptable iscursor cur is select table_name from user_tables;drop_sql varchar2(1000);begin for tbname in cur loop ... 阅读全文

摘要：--建表语句create table student(id number(9),name varchar2(64),age number(5));create table class(id number(9),name varchar2(64),teacherid number(9),student... 阅读全文