NLS_DATE_FORMAT

Property	Description
Parameter type	String
Syntax	NLS_DATE_FORMAT = "format"
Default value	Derived from NLS_TERRITORY
Modifiable	ALTER SESSION
Range of values	Any valid date format mask but not exceeding a fixed length
Basic	No

NLS_DATE_FORMAT specifies the default date format to use with the TO_CHAR and TO_DATE functions. The default value of this parameter is determined by NLS_TERRITORY.

The value of this parameter can be any valid date format mask, and the value must be surrounded by double quotation marks. For example:

NLS_DATE_FORMAT = "MM/DD/YYYY"

Note:

1. Query for the current value of the parameter

select name, value, isdefault, isses_modifiable, issys_modifiable,

isinstance_modifiable, isdeprecated, description

from v$parameter where upper(name) = ‘NLS_DATE_FORMAT’;

NAME	VALUE	IS DEFAULT	ISSES_ MODIFIABLE	ISSYS_ MODIFIABLE	ISINSTANCE_ MODIFIABLE	IS DEPRECATED	DESCRIPTION
nls_date_format		TRUE	TRUE	FALSE	FALSE	FALSE	NLS Oracle date format

Oracle initializatoin parameters