Archives for ORACLE DBA - Page 2
NID Utility in Oracle – RENAME DATABASE
DBNEWID (NID) utility was introduced in Oracle 10g, Which can change the database identifier (DBID) and the database name (DBNAME). NID utility allows us to change Only DBID Only DBNAME…
ORA-27125: unable to create shared memory segment when run DBCA
I have installed 10gR2 on linux environment, When running DBCA it got filed with below error ORA-27125: unable to create shared memory segment SOLUTION: cd $ORACLE_HOME/bin mv oracle …
ORA-01031: insufficient privileges when connect as sysdba
Not able to connect Oracle database, When issue command — > sqlplus “/ as sysdba” $ sqlplus “/ as sysdba” SQL*Plus: Release Production on Wed Jan 22 02:09:17 2014 Copyright…
Oracle ORA-21561 : OID generation failed
Giving below error when trying to connect from Oracle client “ORA-21561 : OID generation failed” ERROR: sqlplus <test_user>/<test_user_password>@<database_name> xxxxx xxxx xxxx xxxx ERROR: ORA-21561 : OID generation failed Enter user-name:…
ORA-12537: TNS:connection closed
Giving below error when trying to connect oracle user ERROR: Sqlplus scott/tiger@PROD SQL*Plus: Release – Production on Thu Oct 16 15:06:46 2008 Copyright (c) 1982, 2005, Oracle. All rights reserved.…
CHECK TABLESPACE SIZE, FREE AND USED SPACE
Below query is used for finding total tablespace size and free, used space. select tablespace_name, ROUND(bytes_free,2) free,ROUND(bytes_total-bytes_free,2) used, ROUND(bytes_total,2) total,perused from (select , ,, ROUND((100-(100*)),2) perused from (Select tablespace_name,sum(bytes)/1024/1024 bytes_free…
DROP DATABASE THROUGH RMAN
In Oracle Database 10gR1 Oracle introduced the RMAN command DROP DATABSE. This one simple statement has the ability to completely remove a database including all RMAN backups with the optional…
Drop temp tablespace taking long time
Created new temporary tablespace: CREATE TEMPORARY TABLESPACE TEMP01 TEMPFILE ‘/u01/oracle/#8217; SIZE 2g; Make new temporary tablespace as default: ALTER DATABASE DEFAULT TEMPORARY TABLESPACE TEMP01; Dropping old temporary tablespace, Which is…
Find size of Table,Index and USER/SCHEMA in Oracle
How to find size of Table or Index or User/Schema in Oracle Database. SIZE OF TABLE: Select segment_name,sum(bytes)/1024/1024/1024 as “SIZE in GB” from user_segments where segment_name=’TABLE_NAME’ group by segment_name; OR…
Disable Case Sensitive in Oracle Database 11g
Prior to 11g Passwords in Oracle are not case sensitive. Now from 11g Oracle passwords are Case sensitive. Parameter sec_case_sensitive_logon has been included in Oracle 11g. sql> create user test…