ค้นหาโพสต์ที่ถูกลบและยกเลิกการลบหลายครั้ง ไม่จำเป็นต้องใช้ตารางทั้งหมด
Find posts that were deleted and undeleted many times.It is not neccessary to use all the tables.
 FlagTypes:  Id [ number]  Name [ text]  Description [ text] 
SELECT PostId AS "post_link", COUNT(*) AS Deletions FROM PostHistory WHERE PostHistoryTypeId = 12 GROUP BY PostId HAVING COUNT(*) > 2 ORDER BY Deletions DESC