by Mohamed El Desouki [email protected] Tel :00966 553450836 جامعة سلمان بن عبد العزيز – السعودية – الخرج in this lecture we continue in lesson 3 from section 13 of the course , it covers the following 1-Drop Tables Using Drop Table Stataement. 2–Delete Table Data completely using Truncate Table Data 3- Restore Dropped Tables Using FlashBack Statement 4- Query Old versions of Data Rows using FlashBack Queries 5- How to add comments on a table