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Oracle Database 10g: A Beginner's Guide by Michael Corey, Michael Abbey, Ian Abramson

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CRITICAL SKILL 3.9

Manage Users

Before you can do anything in Oracle, you need to have a user ID created to enable you to log in to Oracle. As a DBA, you will begin with the SYS or SYSTEM accounts since these accounts both have the DBA role and exist in all Oracle databases. They are often used to perform database administration tasks. The SYS account is also granted the sysdba privilege and is the schema that the Oracle catalog is stored in. You should only use the SYS account when you need to perform a task as SYS or need the sysdba privilege. If your database was created using the Database Configuration Assistant (dbca), then you will also automatically get the SYSMAN and DBSNMP accounts. SYSMAN is used to administer Oracle Enterprise Manager ...

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