您好,欢迎光临! 请 |

DBA,SYSDBA,SYSOPER三者的

DBA,SYSDBA,SYSOPER三者的区别

什么是DBA?什么是SYSDBA,什么又是SYSOPER?三者究竟有何联系呢? 在Oracle数据库领域里,很多Oracle初学者(Me 2)很容易被这三个术语迷惑,就其原因还是基础概念没有弄清楚。记得自己刚开始接触Oracle的时候,也是云里雾里,现在基本弄明白,故写出来和大家分享: DBA:在Oracle数据库里面其实只是一个角色(role)。那么什么是角色呢?可......

Can objects of the same Schema reside

Can objects of the same Schema reside in different tablespaces?

The answer is YES. For example ,if  one user have a table and a index schema,he/she can put the table and index into respective  tablespaces. 下载本文的PDF版本, 方便离线阅读转载

What is SYSTEM tablespace and whe

What is SYSTEM tablespace and when is it created?

Every Oracle database contains a tablespace named SYSTEM, which is automatically created when the database is created. The SYSTEM tablespace always contains the data dictionary tables for the entire database. 下载本文的PDF版本, 方便离线阅读转载

What are the components of logical data

What are the components of logical database structure of Oracle database?

There are tablespaces and database's schema objects. Generally,the logical database structure can be divided into TABLESPACES,SEGMENTS,EXTENTS,BLOCKS. 下载本文的PDF版本, 方便离线阅读转载

What is the schema ?

What is the schema ?

A schema is a collection of database objects owned by a specific database user,or schema objects.Schema has the same name as that user,every user has a single schema,so the two terms(Schema,User) are synonymous. Schema objects include the segments(tables,indexes..etc) as we can see in the tablespaces as well as t......

What are the components of physical dat

What are the components of physical database structure of Oracle database?

Oracle database is comprised of three types of files:One or more datafiles, two or more redo log files, and one or more control files. 下载本文的PDF版本, 方便离线阅读转载