Q: SQL*Loader w/ variable fields

I have looked through the manual several times and I was just wondering...

If, I have a variable length data file delimited by commas, optionally enclosed by quotes, containing: field1, field2, field3, field4, field5, ..., fieldn-1, fieldn

and

I only want to read in field1, field2, field4, field5, ..., fieldn

How can I get sql*load to skip the omitted fields in a variable length data file delimited by commas?

Can I simply enter "," in my sql*load file as place holders, skipping over the data??

-- 
Neil Greene
President, benchMark Developments, Inc. [NeXT VAR]
President, Kentucky NeXT User Group, Inc.
North American, TIFFany Distributor