orcale id自增

Class.forName("oracle.jdbc.driver.OracleDriver"); 

            conn = DriverManager.getConnection( 

                    "jdbc:oracle:thin:@localhost:1521:orcl", "scott", "Admin518");  
create sequence seq;  //创建一个序列(默认从1开始)

drop  sequence seq; 

create table CTL(id number primary key,name varchar2(20)); 

insert into CTL values (seq.nextval ,'zhangsan'); //id=1

insert into CTL values (seq.nextval,'lisi');  //id=2