Last refers to the ordinal position of a record in a set of data. If the set is not ordered, the actual "last" record is random. And even if it is ordered, if the sort key is not unique, records with equal sort key values will be in random order within their set. Remember your set theory, relational tables are unordered sets. Many people get fooled because small tables will usually maintain a consistant order. However, large tables are completely unreliable as to sequence of records unless they are sorted.