--------------------------------- --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;
