String 

NLS_NUMERIC_CHARACTERS =

"decimal_character group_separator" 

Dynamic. Scope = ALTER SESSION. 

Derived from NLS_TERRITORY 

NLS_NUMERIC_CHARACTERS specifies the characters to use as the group separator and decimal character. It overrides those characters defined implicitly by NLS_TERRITORY. The group separator separates integer groups (that is, thousands, millions, billions, and so on). The decimal separates the integer portion of a number from the decimal portion.  

You can specify any character as the decimal or group separator. The two characters specified must be single-byte and must be different from each other. The characters cannot be any numeric character or any of the following characters: plus (+), hyphen (-), less than sign (<), greater than sign (>). Either character can be a space. 

For example, if you wish to specify a comma as the decimal character and a space as the group separator, you would set this parameter as follows:

NLS_NUMERIC_CHARACTERS = ", "

See Also: Oracle8i National Language Support Guide for more information on setting this parameter.