Est-ce que 'mbraux' (un pseudo au hasard ) adj publi un post ?.ไม่จำเป็นต้องใช้ตารางทั้งหมด
Est-ce que 'mbraux' (un pseudo au hasard ) a d j publi un post ?.It is not neccessary to use all the tables.
 Users:  Id [ number]  Reputation [ number]  CreationDate [ time]  DisplayName [ text]  LastAccessDate [ time]  WebsiteUrl [ text]  Location [ text]  AboutMe [ text]  Views [ number]  UpVotes [ number]  DownVotes [ number]  ProfileImageUrl [ text]  EmailHash [ text]  AccountId [ number] 
SELECT COUNT(p.Id) FROM Posts AS p JOIN Users AS u ON p.OwnerUserId = u.Id WHERE u.DisplayName = 'Mat Mannion' GROUP BY p.Id