SAS retains column names
when reading data from DBMS tables, unless a column name contains
characters that SAS does not allow, such as $ or @. SAS allows alphanumeric
characters and the underscore (_).
This option is intended
primarily for National Language Support, notably the conversion of
kanji to English characters because the English characters converted
from kanji are often those that are not allowed in SAS.
Note: The various interfaces handle
name collisions differently in SAS Version 6. Some interfaces appended
to the end of the name; other interfaces replaced the last characters
in the name. Some interfaces used a single sequence number, other
interfaces used unique counters. If you specify VALIDVARNAME=V6, name
collisions are handled the same as they were in SAS Version 6.