DBA - จำนวนโพสต์ทั้งหมดโดยเซิร์ฟเวอร์ฐานข้อมูลต่อเดือน - MongoDB ไม่จำเป็นต้องใช้ตารางทั้งหมด
DBA - Total Posts by Database Server Per Month - MongoDB.It is not neccessary to use all the tables.
 PostHistory:  Id [ number]  PostHistoryTypeId [ number]  PostId [ number]  RevisionGUID [ other]  CreationDate [ time]  UserId [ number]  UserDisplayName [ text]  Comment [ text]  Text [ text]  ContentLicense [ text] 
SELECT CONCAT(YEAR(P.CreationDate), '-', MONTH(P.CreationDate)) AS YearMonth, 'MongoDB' AS TagName, COUNT(*) AS PostCount FROM Posts AS P INNER JOIN PostTags AS PT ON (P.Id = PT.PostId) INNER JOIN Tags AS T ON (PT.TagId = T.Id) WHERE T.TagName LIKE 'mongodb%' GROUP BY YEAR(P.CreationDate), MONTH(P.CreationDate) ORDER BY YEAR(P.CreationDate) DESC, MONTH(P.CreationDate) DESC