40-1:
	SELECT dname,rowid FROM dept;
40-2:
	SELECT distinct dbms_rowid.rowid_object(rowid) object# FROM dept;
40-3:
	SELECT dbms_rowid.rowid_relative_fno(rowid) file# FROM dept WHERE dname='ACCOUNTING';
40-4:
	SELECT dbms_rowid.rowid_block_number(rowid) file# FROM dept WHERE dname='RESEARCH';
40-5:
	SELECT dbms_rowid.rowid_row_number(rowid) row# FROM dept WHERE dname='SALES';