--------------------------------- --创建一个新用户 --------------------------------- create user hahaya identified by ha

---------------------------------

--创建一个新用户

---------------------------------

create user hahaya

identified by hahaya

default tablespace users

temporary tablespace temp;

---------------------------------

--

---------------------------------

grant dba, sysdba to hahaya

with admin option;

---------------------------------

--创建一个表

---------------------------------

create table hahaya.book_book(

book_id int not null,

book_name varchar2(200),

book_price int,

primary key(book_id)

);

-----------------------------------------------------

--向表中插入数据

--使用第二中方式的时候提供的值一定要和表的字段个数相等

------------------------------------------------------

insert into hahaya.book_book(book_id, book_name, book_price) values(1, 'thinking in c++', 80);

insert into hahaya.book_book values(2, 'The C++ Programming Language', 100);

-------------------------------------------------------

--查询表中数据

-------------------------------------------------------

select * from hahaya.book_book;

-------------------------------------------------------

--更改表中某行数据

-------------------------------------------------------

update hahaya.book_book set book_price=90

where book_id=2;

select * from hahaya.book_book;

-----------------------------------------------

--删除表中某行数据

-----------------------------------------------

delete from hahaya.book_book where book_id=2;

select * from hahaya.book_book;