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Can I use Oracle Database offline?
the user can work offline using his local database.
How do I disconnect an Oracle Database?
In SQL*Plus command-line, use EXIT or QUIT to log out of Oracle Database and return control to your computer’s operating system. In iSQL*Plus, click the Logout button to log out of Oracle Database. Your script might begin with a CONNECT command and end with a DISCONNECT, as shown later.
How do I remove a connected user in Oracle?
Identify the correct session and terminate the session by performing the steps below:
- Invoke SQL*Plus.
- Query V$SESSION supplying the username for the session you want to terminate: SELECT SID, SERIAL#, STATUS, SERVER.
- Execute the ALTER SYSTEM command to terminate the session: ALTER SYSTEM KILL SESSION ”
How do you mount a database?
To mount the database, the instance finds the database control files and opens them. Control files are specified in the CONTROL_FILES initialization parameter in the parameter file used to start the instance. Oracle then reads the control files to get the names of the database’s datafiles and redo log files.
What are blocking sessions in Oracle?
Blocking sessions occur when a session issues an insert, update or delete command that changes a row. When the change occurs, the row is locked until the session either commits the change, rolls the change back or the user logs off the system.
Can’t drop login as the user is currently logged in SQL Server?
Microsoft SQL Server Error 15434 Solution to fix this issue is to close all sessions which are opened by this login and then drop it. You can get the details about the sessions which are open using this login id either by sp_who2 or by DMV sys. As error clearly says that above login is currently logged in.
How to take a datafile offline in Oracle?
To take a datafile offline, first we should query the datafile as follows; A data file in ARCHIVELOG mode can be taken offline as follows. Recovery is required when a datafile in ARCHIVELOG mode has taken offline. When a database in ARCHIVE mode wants to be taken from offline mode to online mode, it needs a recovery process as follows.
What happens when a database is taken offline?
When a database instance is shut down in normal priority (in other words, not aborted) or when a tablespace is taken offline in normal priority (in other words, not temporary or immediate), an offline datafile backup is a copy of “consistent” data.
How to take a tablespace offline and online?
To Take a Tablespace Offline give the following command SQL>alter tablespace ica offline; To again bring it back online give the following command. SQL>alter tablespace ica online; To take individual datafile offline type the following command SQL>alter database datafile ‘/u01/oracle/ica/ica_tbs01.dbf’ offline;
Can a datafile be backed up while it is offline?
You can back up a datafile while it is offline or online. Choosing whether to take online or offline datafile backups depends only on the availability requirements of the data — online datafile backups are the only choice if the data being backed up must always be available. The following sections describe each type of datafile backup.