|Default value||Derived from
|Range of values||Any valid datetime format mask|
The value must be surrounded by quotation marks as follows:
NLS_TIMESTAMP_FORMAT = 'YYYY-MM-DD HH:MI:SS.FF'
You can specify the value of
NLS_TIMESTAMP_FORMAT by setting it in the initialization parameter file. You can specify its value for a client as a client environment variable.
You can also alter the value of
NLS_TIMESTAMP_FORMAT by changing its value in the initialization parameter and then restarting the instance. To alter the value during a session use the
ALTER SESSION SET statement.
Note:The value of this initialization parameter
NLS_TIMESTAMP_FORMATis used to initialize the session value of this parameter, which is the actual value referenced by the SQL query processing. This initial value is overridden by a client-side value if the client uses the Oracle JDBC driver or if the client is OCI-based and the
NLS_LANGclient setting (environment variable) is defined. The initialization parameter value is, therefore, usually ignored.