มีแท็กเฉพาะเพียงแท็กเดียว ไม่จำเป็นต้องใช้ทุกตาราง
s with one specific tag.It is not neccessary to use all the tables.
 Badges:  Id [ number]  UserId [ number]  Name [ text]  Date [ time]  Class [ number]  TagBased [ boolean] 
SELECT Id AS "post_link", CreationDate FROM Posts WHERE PostTypeId = 1 AND Tags LIKE LOWER('%hard-science%') ORDER BY CreationDate DESC LIMIT 5000