Returns: The number of affected rows by the last query.
sybase_affected_rows() returns the number of
rows affected by the last INSERT, UPDATE or DELETE query on the
server associated with the specified link identifier. If the
link identifier isn't specified, the last opened link is assumed.
This command is not effective for SELECT statements, only on
statements which modify records. To retrieve the number of rows
returned from a SELECT, use sybase_num_rows().
This function is only available using the CT library interface
to Sybase, and not the DB library.