Oracle插入日期型数据

create table BOOKINFO(
id number(10) primary key,
bname varchar2(30) not null,
bnumber number(20) not null,
bauthor varchar2(30) not null,
bconcern varchar2(30) not null,
bprice number(10) not null,
btype varchar2(30) not null,
btime date not null,
bdescription varchar(100)

);

insert into bookinfo values(seq_book.nextval,'java',1001,'张三','人民出版社',52,'计算机教育', to_date('2012-3-3','yyyy-mm-dd'),'一本JAVA书');