基本sql语句

//查看sequences
select * from user_sequences;
//查看当前sequences
select seq_plan_sm_user.currval from dual;
//查看下一个sequences
select seq_plan_sm_user.nextval from dual;
//更新Date
update plan_sm_user set createDate = to_date('2012-1-1', 'yyyy-MM-dd');
update plan_sm_user set createDate = sysdate;(插入系统当前时间)
//向带有主键的表中插入一条记录
insert into plan_sm_user(userId, emp_indo) values(seq_plan_sm_user.nextval, '60337899');
//增加一列
alter table plan_sm_user add benefitChanne varchar2(20);
//删除一列
alter table plan_sm_user drop column benefitChanne;