The NLS_NUMERIC_CHARACTERS option specifies the decimal marker and thousands group marker for the session. NLS_NUMERIC_CHARACTERS affects the display of numeric data and the setting of the OLAP DML THOUSANDSCHAR option, the DECIMALCHAR option, or both.
Within a session, you can dynamically modify the value of this option using the OLAP DML syntax show below or by using the SQL statement ALTER SESSION
SET
option
=
value
.
See Oracle Database Globalization Support Guide for more information about NLS database parameters.