db().select(orderby=db.table.field) ORDERS ASCENDING
db().select(orderby=~db.table.field) ORDERS DESCENDING
db().select(orderby=~db.table.field|db.table.otherfield)
ORDERS DESCVENDING in field ASCENDING in otherfield
You can also do
db().select(orderby="...")
WHERE "..." is an SQL order by option.