listener.ora and tnsnames.ora location in oracle 12c database

listener.ora is the database server level file and tnsnames.ora is the client side file. oracle listener service should be up and running to get the new connection to oracle database. In this... Read more »

Difference between delete and drop ?- SQL Interview question

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How to put database in Archive/No-Archive log mode?- Oracle Interview question

In this blog I will show you the importance of archive and no-archive log mode. Mode of Logging There are two types of logging modes in Oracle database :- 1. ARCHIVELOG :-... Read more »

How to Set ORACLE_HOME & ORACLE_SID on Windows Server

We will be finding out the way to set oracle environment path for windows server. What is ORACLE_HOME used for? The ORACLE_HOME is an environment variable which is used to set and... Read more »

How to check oracle database status – Interview question

let us find out the database health status by using following sql command. Check whether the Oracle Process run or not#> ps -ef | grep pmon If no pmon detected, your database... Read more »

Basic Unix Command for Oracle DBA

In this video you will understand the use of unix command for daily dba life. you will find this command useful while while working on dba environment. 1. To Cleanup trace files... Read more »

How to change sys & System user password in Oracle 12C database

We cannot change the sys and system password in usual way as like till 11g. we have different method to do same. following blog describe the way to change user password in... Read more »

Alert log file in Oracle

As you know alert log file location determined by the background dump destination it’s specified by backupground_dump_dest parameter You can find location of alert log with following command. SQL> show parameter background... Read more »

How to copy data from one table to another ?- SQL Interview question

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Difference between var and val in spark- Interview question

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