the conception of schema is different in different db software. here i just refer to oracle schema。 following is quote from "http://docs.oracle.com/cd/B19306_01/server.102/b14200/sql_elements007.htm" schema conception: Schema Objects Aschemais a collection of logical structures of data, o...
举比例如以下: SQL> Gruant dba to scott SQL> create table test(name char(10)); Table created. SQL> create table system.test(name char(10)); Table created. SQL> insert into test values(‘scott’); 1 row created. SQL> insert into system.test values(‘system’); 1 row created. SQL>...
To execute a CREATE SCHEMA statement, Oracle Database executes each included statement. If all statements execute successfully, then the database commits the transaction. If any statement results in an error, then the database rolls back all the statements. 大致意思是:在单个事务中创建多个表和视图...
Oracle Database 10gおよびOracle Database 11gの管理性の改善の一部として、この非常に重要なニーズに対処するためにSQLアクセス・アドバイザが導入されました。SQLアクセス・アドバイザは、索引、マテリアライズド・ビュー、マテリアライズド・ビュー・ログ、あるいは作成、削除、また...
第一步,以sys用户登陆SQL并建立普通用户storm和penguin: $ sqlplus / as sysdba SQL> create user storm identified by storm; User created. SQL> create user penguin identified by penguin; User created. 第二步,赋予一些基本的权限给新建的用户storm和penguin: ...
orcle中的scheme和user区别 schema oracle 概述: (一)什么Oracle叫用户(user): A user is a name defined in the database that can connect to and access objects. 大意:Oracle用户是用连接数据库和访问数据库对象的。(用户是用来连接数据库访问数据库)。
schema在数据库中表示的是数据库对象集合,它包含了各种对像,比如:表,视图,存储过程,索引等等。 一般一个用户对应一个集合,所以为区分不同集合就需给不同集合起名。用户的schema名就相当于用户名,并作为该用户缺省schema。所以schema集合看上去像用户名。
A user is a name defined in the database that can connect to and access objects. Schemas and users help database administrators manage database security. 从定义中我们可以看出schema为对象的集合,为了区分各个集合,我们需要给这个集合起个名字,这些名字就是我们在企业管理器的方案下看到的许多类似用户名的...
Connect to SQL Server Next choose Connect to SQL Server and enter the appropriate connection information. If you use a database name that doesn't already exist, SSMA for Oracle creates it for you. Convert Schema Right-click on HR in Oracle Metadata Explorer, and choose Convert Schema. Synchro...
Oracle Cloud Infrastructure - Database Service - Version N/A and later Information in this document applies to any platform. Symptoms DBA Functions (like User Mgmt) SQL Developer v17.2 refers to an incorrect column while trying to display Export DATAPUMP job status in DBA menu tree. ...