用戶活動或單個選擇查詢的單個表

Question

我正在爲我的客戶創建一個社交網絡，他們需要類似Facebook的牆和用戶最近的活動。

我有大約8表說，用戶帳戶，信息，組，評論，頁面，相冊，喜歡，股票。

在user profile中，他們需要網站中用戶的整個活動。

我可以使用單個加入查詢或需要具有單個表作爲最近的活動。

Answer 1

您可能會考慮創建一個log或activity表，其中包含其最近活動的記錄。這樣你只需要一個查詢。您可以根據活動類型加入其他表格。

Answer 2

您可以通過聯合查詢從不同的表中提取數據並存儲在視圖中。這裏的總體思路...

create view 'v_recent_activity' as 
select user_id, 'comment' as action, comment_text as action_info, comment_date as action_date from comments 
union 
select user_id, 'photo' as action, photo_url as action_info, photo_date as action_date from photos 
union 
select user_id, 'page' as action, page_url as action_info, comment_date as action_date from pages 
union 
select user_id, 'likes' as action, like_info as action_info, comment_date as action_date from likes 
union 
select user_id, 'shares' as action, share_info as action_info, share_date as action_date from shares 

然後，你可以用一些訪問它像

Select * from v_recent_activity where action_date between <begin_date> and <end_date> 

或聯接

Select a.*, b.* from users a join v_recent_activity b on a.id = b.user_id where a.id = <user_id> and b.action_date between <begin_date> and <end_date>