Solved

NLS_DATE_FORMAT

Posted on 2000-04-20
4
16,570 Views
Last Modified: 2008-03-03
I am using Oracle 8i and I changed the NLS_DATE_FORMAT='MM/DD/YYYY' in the parameter file(init.ora). And when I check the sysdate from SQL*PLUS, it is still showing the date in DD-MON-YY format. But when I check the sysdate from SVRMGR tool, it is showing me the right format (ie MM/DD/YYYY ). I don't know how to work around this problem.
Note: when I use ALTER SESSION SET NLS_DATE_FORMAT= "MM/DD/YYYY" to change the date format for a particular session from SQL*PLUS, I am getting what I want...
0
Comment
Question by:bragkumar
  • 2
  • 2
4 Comments
 
LVL 4

Accepted Solution

by:
syakobson earned 1000 total points
ID: 2736229
NLS_DATE_FORMAT is client centric, not server centric. This way each client can see dates the way he/she needs to. For example clent in Europe is used to dates in DD/MM/YY format while clients in the US are used to MM/DD/YY. Therefore, each client needs to set NLS_DATE_FORMAT on the client box. In Windows, start regedit, go to HKEY_Local_Machine, Software, Oracle and add entry NLS_DATE_FORMAT = 'MM/DD/YYYY'. On Unix set environment variable NLS_DATE_FORMAT.

Solomon Yakobson.
0
 

Author Comment

by:bragkumar
ID: 2736258
I appreicate your immediate help. But i got a question for you.. In this case what is the use of NLS_DATE_FORMAT in parameter file. what is for NLS_DATE_FORMAT in init.ora? I am not clear..... From your answer I guess there is no need change to the parameter file. Am I right?
0
 
LVL 4

Expert Comment

by:syakobson
ID: 2736436
Well,
NLS_DATE_FORMAT is not that straight forward. And explanation I gave you is not entirely true. There is a lot of articles in Oracle's MetaLink on that topic. If you are MetaLink customer check http://support.oracle.com.sg/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=74375.1

NLS_DATE_FORMAT is used if a date format mask is not specified in application code. The effective NLS_DATE_FORMAT is determined by the following (in order of precedence):

1. Session NLS_DATE_FORMAT (via ALTER SESSION command)
2. Client side NLS_DATE_FORMAT (from client environment variables/registry settings)
3. Instance NLS_DATE_FORMAT (from init.ora file)
4. Database NLS_DATE_FORMAT

Session NLS_DATE_FORMAT is set to client side NLS_DATE_FORMAT (explicit or implicit) ONLY if NLS_LANG is set. Another words, if NLS_LANG is set, then session NLS_DATE_FORMAT will be taken from the client. If clent NLS_LANG is set and client NLS_DATE_FORMAT is not, session NLS_DATE_FORMAT will default to DD-MON-YY (and that was exactly what you experienced). If NLS_LANG is not specified on the client side, NLS_DATE_FORMAT will be taken from instance NLS_DATE_FORMAT which is NLS_DATE_FORMAT from INIT.ORA. If NLS_DATE_FORMAT is not set in INIT.ORA, session NLS_DATE_FORMAT will default to DD-MON-YY.

Solomon Yakobson.
0
 

Author Comment

by:bragkumar
ID: 2737763
Thanks a lot Solomon!!!
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Note: this article covers simple compression. Oracle introduced in version 11g release 2 a new feature called Advanced Compression which is not covered here. General principle of Oracle compression Oracle compression is a way of reducing the d…
Have you ever had to make fundamental changes to a table in Oracle, but haven't been able to get any downtime?  I'm talking things like: * Dropping columns * Shrinking allocated space * Removing chained blocks and restoring the PCTFREE * Re-or…
This video explains at a high level about the four available data types in Oracle and how dates can be manipulated by the user to get data into and out of the database.
Via a live example, show how to take different types of Oracle backups using RMAN.

685 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question