Multiple choice technology databases Which of the following are valid pseudocolumns in oracle? rowid row_num sl_no rownum sid Reveal answer Fill a bubble to check yourself A,D Correct answer Explanation In Oracle SQL, rowid (the unique physical address of a row) and rownum (the sequential order number of a retrieved row) are valid built-in pseudocolumns. row_num, sl_no, and sid are not standard pseudocolumns.