I am using Adminer 4.7.3 connecting to an oracle DB and I want to display dates in a different format from what the default is ('DD-MON-YY'). I tried using the command
ALTER SESSION SET NLS_DATE_FORMAT = 'DD-MON-YYYY HH:MI:SS' but it only lasts for that query, and it goes back to the old date format once I open the table again. Is there a better way to force the date to show up in a different format?
You have a few options. First, you can perform an
ALTER SESSION SET NLS_DATE_FORMAT = 'DD-MON-YYYY HH:MI:SS'
every time you log on. If you don't want to do this you can:
If you're using *nix:
setenv NLS_DATE_FORMAT "dd-mon-yyyy hh:mi:ss"
If you're using Windows:
Control Panel-System-Advanced System Settings-Environment Variables, and create the NLS_DATE_FORMAT environment variable with the appropriate setting.
If you want an entirely database-dependent solution, you can use an ON LOGON trigger similar to the following:
CREATE OR REPLACE TRIGGER DATABASE_AFTER_LOGON
AFTER LOGON
ON DATABASE
BEGIN
EXECUTE IMMEDIATE 'ALTER SESSION SET NLS_DATE_FORMAT = ''DD-MON-YYYY HH:MI:SS''';
END DATABASE_AFTER_LOGON;
Related
application when connecting to oracle, at session level it sets the format 'YYYY-MM-DD HH24:MI:SS', v$parameter also has the same format.
while calling a procedure, the date argument is passed like '2022-07-06 10:54:06'. most of the time it works but sometimes we get "SQLCODE = -1861".
the problem continues until that session is closed by an application restart.
At this moment it is suspected the NLS_DATE_FORMAT was changed for that session(its just a guess).
adding to_date to the date argument while calling the procedure would most likely resolve the problem,
putting a trigger to capture the NLS_DATE_FORMAT at logon time also may not help as it could be changed after login.
so question is, is there a way to get the NLS_DATE_FORMAT of all sessions on an instance? or is there a way to change the NLS_DATE_FORMAT of an already active session from another session?
is there a way to get the NLS_DATE_FORMAT of all sessions on an instance?
For your own session (which is what you actually want, based on the comment), you'd query v$nls_parameters:
SQL> select * from v$nls_parameters where parameter = 'NLS_DATE_FORMAT';
PARAMETER VALUE
-------------------- --------------------
NLS_DATE_FORMAT dd.mm.yyyy hh24:mi
SQL>
As of you viewing information about other sessions, you can't do that easily - see what Sergiusz Wolicki from Oracle says:
(...) this information is not easily available. NLS environment is kept in an UGA variable and other sessions to not have access to it. Skilled Oracle engineers would be able to get this information from an UGA dump but otherwise it is not retrievable.
I'm not one of "skilled Oracle engineers" so ... I'm afraid I can't help any further, sorry.
I want to change NLS_DATE_FORMAT and NLS_TIMESTAMP_FORMAT to like below format
NLS_DATE_FORMAT='YYYY-MM-DD'
NLS_TIMESTAMP_FORMAT='YYYY-MM-DD"T"HH24:MI:SS.FF3"Z"'
I don't want to use this in session level like ALTER SESSION SET..
I cannot set this DB level.
I want this to be set in Schema level.
Generally, This can be achieved using a login or create session trigger , If it is feasible for you.
You can create such a trigger on your schema and set NLS variables as following:
EXECUTE IMMEDIATE 'ALTER SESSION SET NLS_DATE_FORMAT = ''''your format''';
EXECUTE IMMEDIATE 'ALTER SESSION SET NLS_TIMESTAMP_FORMAT = ''''your format''';
Cheers!!
I have a NLS date format as DD-MON-RR. This gives me the underlying date format as YY while I want to change it to YYYY. I tried using the following query and it ran successfully
DECLARE
v_date DATE := sysdate;
BEGIN
DBMS_OUTPUT.put_line(TO_CHAR(v_date, 'MM/DD/YYYY'));
END;
But that didn't change the default format.
for some context, I am trying to import data from Oracle to Tableau. Unfortunately when I try to export a crosstab from Tableau server it looks at the underlying data rather than whats on the view. This causes the date that I have as 25-Jun-2017 to change to 25-Jun-17 in the excel.
The only workaround I have been able to understand is to change the default format of the underlying/source data which in this case is Oracle DB.
I am using TOAD and am trying to understand how can I change it to possibly DD/MON/RRRR format or something similar with 4 digits in the year column.
Any workaround is also appreciated
As already given in other answers you can set NLS_DATE_FORMAT by ALTER SESSION.
In order to set it only for you local PC, open Registry Editor and navigate to HKLM\SOFTWARE\Wow6432Node\ORACLE\KEY_%ORACLE_HOME_NAME%, resp. HKLM\SOFTWARE\ORACLE\KEY_%ORACLE_HOME_NAME%.
There you can add a String Value NLS_DATE_FORMAT, for example:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\KEY_OraClient11g_home1]
"NLS_TIMESTAMP_FORMAT"="YYYY-MM-DD HH24:MI:SSfmXFF3"
"NLS_TIMESTAMP_TZ_FORMAT"="YYYY-MM-DD HH24:MI:SSfmXFF3 fmTZH:TZM"
"NLS_DATE_FORMAT"="YYYY-MM-DD HH24:MI:SS"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ORACLE\KEY_OraClient11g_home1]
"NLS_TIMESTAMP_FORMAT"="YYYY-MM-DD HH24:MI:SSfmXFF3"
"NLS_TIMESTAMP_TZ_FORMAT"="YYYY-MM-DD HH24:MI:SSfmXFF3 fmTZH:TZM"
"NLS_DATE_FORMAT"="YYYY-MM-DD HH24:MI:SS"
You can set NLS_DATE_FORMAT also as an Environment Variable in Windows Settings.
alter session set nls_date_format='DD/MON/RRRR' programmatically in the application or
CREATE OR REPLACE TRIGGER trg_after_logon AFTER LOGON ON DATABASE
BEGIN
execute immediate 'alter session set NLS_DATE_FORMAT=''DD/MON/RRRR''';
END;
in system or sys schema.
Alternatively, you may use
alter system set NLS_DATE_FORMAT='DD/MON/RRRR' scope = both
provided you're in system or sys, again.
Manage your date format masking using the most reasonable approach
First of all, I agree with Alex regarding using to_char. This would be my first choice for modifying date masks for specific requirements.
In Toad on an ad hoc basis, you could just invoke the alter session command as needed:
ALTER SESSION SET nls_date_format='DD/MON/RRRR';
If you are partial to a specific date format mask (and you see yourself often issuing the command, ALTER SESSION SET NLS...) then perhaps you might want to consider changing your user login settings.
If you just modify your specific user preference login file, login.sql (see here ), your session will adhere to the date format mask of your choosing at the beginning of your session. I am partial to creating the environment variable, SQLPATH, and placing my login script there.
Toad will honor your login.sql file settings (e.g. see this post).
Since this is driven by specific requirements or personal preferences, I would never think of modifying this from default at the site level.
I want to change the date format of Oracle
Now it's DD/MM/YYYY, i want to change it to MM/DD/YYYY
I used a simple code (thank you google)
ALTER SESSION SET NLS_DATE_FORMAT = 'MM/DD/YYYY HH24:MI';
select sysdate from dual;
The problem is when I disconnect and reconnect, the changes are cancelled,
Any help ?
The main of the change is to let Oracle accept insert date with the format MM/DD/YYYY
Thanks in advance
As you see in your command you're altering session. So after reconnect you have new session that gets server settings. For better understanding please read:
https://docs.oracle.com/cd/A87860_01/doc/server.817/a76966/ch2.htm
I would recommend to insert dates always with to_date(data_string,'MM/DD/YYYY HH24:MI') and not trust that NLS won't be changed.
If you're using SQL*Plus, you can add the command to set the nls_date_format in the glogin.sql or login.sql files - see this helpful guide.
However, if your requirement is "to let Oracle accept insert date with the format MM/DD/YYYY", why not simply convert the string into a date when you insert it, e.g.:
insert into some_table (id, date_col)
values (1, to_date('10/25/2016', 'mm/dd/yyyy'));
That way, you don't need to worry about formatting issues; it'll automatically be in the correct format.
You can set this format also in your Registry at
HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\KEY_{Oracle Home Name}\NLS_DATE_FORMAT,
resp.
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ORACLE\KEY_{Oracle Home Name}\NLS_DATE_FORMAT
Example to do this from command line:
reg add "HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\KEY_OraClient11g_home1" /v NLS_DATE_FORMAT /t REG_SZ /d "MM/DD/YYYY HH24:MI" /f
Another possibility is to set the value as Environment Variable, e.g.:
set NLS_DATE_FORMAT="MM/DD/YYYY HH24:MI"
Note, the Environment Variable takes precedence over Registry settings.
But be aware, these just define the default value of NLS_DATE_FORMAT. It can be changed by ALTER SESSION SET NLS_DATE_FORMAT = ... command at any time.
Do ALTER SYSTEM instead of SESSION:
ALTER SYSTEM SET NLS_DATE_FORMAT='MM/DD/YYYY' scope=both;
or:
ALTER SYSTEM SET NLS_DATE_FORMAT='MM/DD/YYYY';
More info here.
I have a function that returns a date (actual a timestamp, date+time).
In the table it looks like this, "2010-09-05 17:33:00".
when i call my function from an sql script like,
select my_package.my_function('2010-09-05')
from dual.
I'll get time in the result.
But if I run the same in a test window I'll only receive the date and not the time.
How could this be?
you are seeing the effect of the NLS_DATE_FORMAT setting. set that as required. eg:
alter session set NLS_DATE_FORMAT="yyyy-mm-dd hh24:mi:ss";
select my_package.my_function('2010-09-05') from dual;
to see the output properly.
or TO_CHAR the output.
select to_char(my_package.my_function('2010-09-05'), 'yyyy-mm-dd hh24:mi:ss') from dual;
What do you mean by test window?
If you mean SQL+ then there will be a format applied, you can change this using
alter session set nls_date_format='DD/MM/YYYY HH24:MI:SS';
Do this at the start of your SQL+ session.
when i simply write ALTER .... then i get error working in procedure. However, i added below script, it worked for me.
execute immediate 'ALTER SESSION SET NLS_DATE_FORMAT = ''DD/MM/YYYY HH24:MI:SS''';