How to change timezone in Oracle Database specific to one SID, system having many DB SID Configured

Question

I have to change timezone for the particular Database(SID). Where I have DB Server is having multiple Database (SID) Configured and installed. When i have connected Particular SID and run below Query :

alter database set time_zone='-05:00'

I got below error:

ERROR at line 1:
ORA-02231: missing or invalid option to ALTER DATABASE

But when i am running alter database set time_zone = 'EST'; query also it did not give error but

Note : I have multiple Database configured in same DB Server I need to change the timezone for particularly to one Database (SID). I cant change in system (OS) level and DB Server level globally.

i am not able to change time zone any one can help.

Answer 1

I have done the following steps it worked for me :

$ ps -ef|grep pmon

This will show list as below :

ORADEV    7554     1  0 Oct28 ?        00:00:03 ora_pmon_MDEV230
ORADEV   20649 32630  0 03:39 pts/9    00:00:00 grep pmon
ORADEV   23386     1  0 Nov12 ?        00:00:00 ora_pmon_MQA230POC

I have added following entry in the oraenv fles as :

$ vi oraenv ( It will open file in Vi Editor) Added the following entry at end of the files:

if [[ ${ORACLE_SID} = "MQA230POC" ]]; then
   TZ=EST+05EDT
   export TZ
   echo "Time Zone set to EST"
else
  TZ=PST+08EDT
   export TZ
   echo "Time Zone set to PST"
fi

---

if [[ ${ORACLE_SID} = "MQA230POC" ]]; then This line will is critical for selecting particular Database.

And run the following command and Test and Restart Database :

$ . oraenv ORACLE_SID = [MQA230POC] ? The Oracle base for ORACLE_HOME=/orasw/database12c/product/12.1.0.2/dbhome_1 is /orasw/database12c Time Zone set to EST

$ sqlplus sys as sysdba
Enter password:XXXXX ( provide password) 

It will give message as below : 
Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

--Run Below Command to Restart DB:

SQL> shut immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup;
ORACLE instance started.

It worked for me I am able to set different timezone for Different Database which i was seeking for. Hope it will help others.