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Once the new user is given a space quota on a tablespace, the user can create database objects such as tables and indexes. By default, any objects a user creates will be placed in the user s default permanent tablespace (USERS in our example). The user can choose to create the objects in any tablespace, however, as long as the user has a space quota on that tablespace. If you want a user to have unlimited space usage rights in all tablespaces, you need to grant the user the UNLIMITED TABLESPACE privilege, as shown here: SQL> GRANT UNLIMITED TABLESPACE TO salapati; Grant succeeded. SQL> If you want a user to create his or her own tablespaces, you must enable the user to create a tablespace by using the GRANT CREATE TABLESPACE TO username command. Similarly, you must grant the DROP TABLESPACE privilege. If a user wishes to subsequently create database objects in a tablespace that they created, they won t need any space quotas on those tablespaces. You can see the individual tablespace quotas allocated to a user by using the DBA_TS_QUOTAS view, as shown here: SQL> SELECT tablespace_name, username, bytes FROM DBA_TS_QUOTAS; TABLESPACE USERNAME BYTES ------------------ ---------SYSAUX DMSYS 196608 SYSAUX OLAPSYS 16252928 SYSAUX WK_TEST 12582912 SYSAUX SYSMAN 78577664 RMAN_TBSP RMAN 8585216 SQL> As you can see, four different users, all owners of various Oracle components, have quotas in the Sysaux tablespace and the user RMAN has a quota on a tablespace created exclusively for the Recovery Manager s use. Since they aren t mandatory, you can create a database without a default temporary tablespace or a default (permanent) tablespace. In such a case, you can assign both tablespaces explicitly when you create a new user. You can also assign a quota on the default permanent tablespace. Here s an

The DBUA combines the work of the Pre-Upgrade Information Tool and the manual upgrade process. The DBUA performs the following pre-upgrade steps automatically: Sets ORACLE_HOME to the new Oracle Database 11g locations. Changes the oratab file entries to the new location. Copies your current init.ora file to the new Oracle Database 11g default init.ora location ($ORACLE_HOME/dbs in UNIX and Linux systems). Checks that your tablespaces have adequate space before the upgrade process begins. These checks also cover the undo tablespace and the rollback segments. Checks for unsupported character sets and invalid data types and usernames, and so on. Performs backups, if you choose. Updates obsolete initialization parameters. Configures the database with the Enterprise Manager, if you choose. Writes detailed trace and log files, as well as showing the upgrade progress. The DBUA can upgrade not only a single instance configuration, but also Oracle Real Application Clusters and standby database configurations as well.

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example showing how to create a user by explicitly specifying the default tablespaces (temporary and permanent). The GRANT QUOTA clause gives the user a 500MB space allocation in the USERS tablespace so the user can create objects there: SQL> CREATE USER salapati IDENTIFIED BY sammyy1 TEMPORARY TABLESPACE TEMPTBS01 DEFAULT TABLESPACE USERS GRANT QUOTA 500M ON USERS; User created. SQL>

Start the DBUA by simply typing dbua at the operating system prompt. You have to log in as the oracle user first. On a Windows server, you start the DBUA tool by going to Start All Programs Oracle Configuration and Migration Tools Database Upgrade Assistant. As mentioned previously, you can do a silent upgrade using the DBUA if you don t want to use the GUI. This means you won t see any prompts when you invoke the DBUA.

You use the ALTER USER statement to alter a user in the database. Using this statement, you can do the following: Change a user s password Assign tablespace quotas Set and alter default and temporary tablespaces Assign a profile and default roles Here s an example showing how a DBA (or the user being altered) can use the ALTER USER command to change a user s password: SQL> USER SQL> User SQL> SHOW USER is "SALAPATI" ALTER USER salapati IDENTIFIED BY altered.

Here s how you would invoke the DBUA in the silent mode for a database called nina: $ dbua -silent dbName nina That s it. Your current database will be migrated to the Oracle Database 11g release.

sammyy1;

Let s take a look at the steps in the automatic upgrade process using the DBUA from the command line. 1. Invoke the DBUA with this command: $ dbua 2. The DBUA GUI Welcome window is displayed, as shown in Figure 9-5. Click Next.

CHAPTER 2 NETWORK ADMINISTRATION AND IT TRENDS THROUGHOUT HISTORY!

Users can also change their own passwords with the PASSWORD command in SQL*Plus, as shown here: SQL> PASSWORD Changing password for SALAPATI Old password: ********* New password: ********* Retype new password: ********* Password changed SQL>

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