标签：style blog color ar sp for 数据 div on
create table ttt (id number primary key ,name varchar2(20),age number(2)) create or replace trigger gger_tt before insert on ttt for each row when (new.id is null) begin select ttt_sequence.nextval into :new.id from dual; end;
标签：style blog color ar sp for 数据 div on
原文地址：http://www.cnblogs.com/tianmingt/p/4099325.html
