เลือกโพสต์ทั้งหมดจากแท็กเดียว ไม่จำเป็นต้องใช้ตารางทั้งหมด
Select all posts from a single tag.It is not neccessary to use all the tables.
 Badges:  Id [ number]  UserId [ number]  Name [ text]  Date [ time]  Class [ number]  TagBased [ boolean] 
SELECT CreationDate, t.TagName FROM Posts AS p JOIN PostTags AS pt ON p.Id = pt.PostId JOIN Tags AS t ON pt.TagId = t.Id WHERE t.TagName = 'numpy'