To import an Oracle exported file with *nix command line, use this command:
imp \'/ as sysdba\' file=expdat.dmp fromuser=ORIGINALUSER touser=DESTINATIONUSER |
To import an Oracle exported file with *nix command line, use this command:
imp \'/ as sysdba\' file=expdat.dmp fromuser=ORIGINALUSER touser=DESTINATIONUSER |
If the database is running, probably the database hasn’t registered yet with the listener. This occurs when the database or listener just starts up. To fix, connect as sysdba:
SHOW parameter LOCAL listener |
If something or nothing appears, reset it with:
ALTER system SET local_listener='(address=(protocol=tcp)(host=localhost)(port=1521))'; ALTER system register; |
At this point test if it’s working fine:
tnsping xe TNS Ping Utility for Linux: Version 11.2.0.2.0 - Production on 26-NOV-2012 17:04:16 Copyright (c) 1997, 2011, Oracle. All rights reserved. Used parameter files: Used TNSNAMES adapter to resolve the alias Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = XE))) OK (0 msec) |
No listener.ora file is required for LISTENER to operate. Try to move, rename, remove, or delete listener.ora file & then restart the listener.
Every Oracle DB tries once every 60 seconds to register itself with LISTENER as shown below:
tail -f /u01/app/oracle/product/11.2.0/xe/log/diag/tnslsnr/XXXXX/listener/alert/log.xml <msg time='2012-10-25T01:15:50.522-07:00' org_id='oracle' comp_id='tnslsnr' type='UNKNOWN' level='16' host_id='host.domain' host_addr='XX.XX.XX.XX'> <txt>25-OCT-2012 01:15:50 * service_update * XE * 0 </txt> </msg> |
Counting all of the rows in a schema can require code that actually counts the table rows so, how do you count up all of the rows for all tables in a schema?
For Oracle with system user:
SELECT TABLE_NAME, table_rows FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = UPPER('{schema}'); |
For mySql:
SELECT TABLE_NAME, table_rows FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = '{schema}'; |
To be able to admin Oracle instance from sqlplus command line on Ubuntu server, for first you need to set the enviroment variables:
source /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh |
At this point, is possible to login as sysdba using:
sqlplus / as sysdba |
if you get insufficient privileges error, you need to add your user to dba group:
usermod [username] -G oracle, dba |
a this point is possible to startup and shutdown the Oracle instance on sqlplus prompt using:
SHUTDOWNN IMMEDIATE; |
To install Orace 11gR2 Express Edition, please take a look to this tutorial (tutorial? THE TUTORIAL!)
https://forums.oracle.com/forums/thread.jspa?threadID=2301639
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