NLS_DATE_FORMAT is an Oracle database parameter that defines the default date format for the database. It can be set to any valid date format string, such as ‘YYYY-MM-DD’ or ‘DD-MON-YY’. To check the current value of NLS_DATE_FORMAT, you can use the following SQL statement:
SELECT value FROM v$nls_parameters WHERE parameter = 'NLS_DATE_FORMAT';
The NLS_DATE_FORMAT parameter is important because it determines how dates are displayed and interpreted by the database. For example, if NLS_DATE_FORMAT is set to ‘YYYY-MM-DD’, then the date ‘2023-03-08’ will be displayed as ‘2023-03-08’. However, if NLS_DATE_FORMAT is set to ‘DD-MON-YY’, then the date ‘2023-03-08′ will be displayed as ’08-MAR-23’.
