//创建临时表空间
create temporary tablespace test_temp
tempfile \'E:\\oracle\\product\\10.2.0\\oradata\\testserver\\test_temp01.dbf\'size 32m
autoextend on
next 32m maxsize 2048m
extent management local;
//创建数据表空间
create tablespace test_data
logging
datafile \'E:\\oracle\\product\\10.2.0\\oradata\\testserver\\test_data01.dbf\'size 32m
autoextend on
next 32m maxsize 2048m
extent management local;
//创建用户并指定表空间
create user username identified by paword
default tablespace test_data
temporary tablespace test_temp;
//给用户授予权限
//一般用户
grant connect,resource to username;
//系统权限
grant connect,dba,resource to username
//创建用户
create user user01 identified by u01
//建表
create table test7272(
id number(10) ,
name varchar2(20) ,
age number(4),
joindate date default sysdate,
primary key(id)
);
//存储过程
//数据库连接池
数据库连接池负责分配、管理和释放数据库连接
//
//创建表空间
create tablespace thirdspace
datafile \'C:/Program Files/Oracle/thirdspace.dbf\' size 10mautoextend on;
//创建用户
create user binbin
identified by binbin
default tablespace firstspace
temporary tablespace temp;
//赋予权限
GRANT CONNECT, SYSDBA, RESOURCE to binbin
//null与\"\"的区别
简单点说null表示还没new出对象，就是还没开辟空间
个对象装的是空字符串。
//建视图
create view viewname
as
sql
//建索引
create index indexname on tablename(columnname)
//在表中增加一列
alter table tablename add columnname columntype
//删除一列
alter table tablename drop columnname
//删除表格内容，表格结构不变
truncate table tableneme
//新增数据
insert into tablename () values()
//直接新增多条数据
insert into tablename()
selecte a,b,c
from tableabc
//更新数据 new除了对象，但是这“”表示
update tablename set columnname=? where
//删除数据
delete from tablename
where
//union语句
sql
union
sql
//case
case
when then
else
end
