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老板是谁的什么就不介绍了.很牛逼反正
Oracle 数据库,甲骨文.
Oracle安装好了几个服务的介绍
OracleServiceORCL
数据库服务,这个服务会自动的启动和停止数据库
OracleHOME_NAMETNSListener
监听服务,只有在数据库需要被远程访问的时候才开启
OraclejobschedulerORCL
数据库工作日程调度,一般没有安排工作日程就不需要启动
OrcaleDBConsoleORCL
主管Oracle客户端,开启本服务后才能够打开Database control文件
Orcale系统用户
SCOTT 普通用户
-- 默认密码是tiger
SYSTEM 管理用户--权限也很大,具有sysoper角色,但是没有create database权限
-- 默认密码:manager
SYS 超级管理员--具备最高权限sysdba角色
具有,create database权限
-- 默认密码:change_on_install
一般来说,对数据库的维护使用 SYSTEM登录就好了
创建用户
create user 用户名 identified by 密码
物理组件(结构)
1,数据文件
存储数据的文件
2,重做日志文件
含对数据所做的更改记录,这样万一出现故障,可以启用数据恢复,一个数据库至少需要两个重做日志文件
3,控制文件
包含维护和验证数据库完整性的必要信息。
例如--控制文件用于识别数据文件和重做日志文件,
一个数据库至少需要一个控制文件,记录数据库的物理结构
逻辑组键(结构)
1,数据库对象
表,视图,同义词,索引,过程,序列,触发器...
2,表空间
是数据库中的基本逻辑结构,一系列数据文件的合
3,段
是对象在数据库中占用的空间
4,区(范围)
是数据一次性预留的一个较大的存储空间
5,块
Oracle最基本的存储单位,在建立数据库的时候指定
dbca 数据库设置
netca 网络设置
tnsping 数据库
sqlplus
sqlplus / as sysdba 管理员身份登录
Oracle的认证
分几类
DBA认证 --- 数据库管理员
--OCA 初级认证
--OCP 专家级认证,要考四门,已经很难了
--OCM 大师级别的认证,要命了这个
--
JAVA认证 --- JAVA开发认证
Orcale网络认证 --- 就自己搞的认证
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