爲活動用戶更新龐大的mySQL查詢

Question

我有一個長形式的PHP函數來遍歷我的所有用戶並測試其活動狀態。它很慢並且需要多個操作......這個SQL操作速度要快得多，但現在我的計數不匹配。

我需要更新這個mySQL查詢來完成1個加法和1個調整。這樣它就模仿了測試用戶活動的確切行爲/功能。

"SELECT DISTINCT last.user_id 
FROM ss_usermeta as last 
JOIN ss_usermeta as next on last.user_id = next.user_id 
WHERE last.meta_key = 'last_trans_date' and last.meta_value <= CURDATE() 
and next.meta_key = 'next_recurring_date' and next.meta_value + INTERVAL 9 day >= CURDATE()"; 

• 檢查每個用戶meta_key爲 'll_customer_id'，並確保其不爲空。
• 將next_recurring_date的比較器從當前日期更改爲當前日期+9天。

Answer 1

您需要另加入這個：

SELECT DISTINCT last.user_id 
FROM ss_usermeta as last 
JOIN ss_usermeta as next 
    on last.user_id = next.user_id 
JOIN ss_usermeta as third 
    on third.user_id = next.user_id 
WHERE last.meta_key = 'last_trans_date' 
    and last.meta_value <= CURDATE() 
and next.meta_key = 'next_recurring_date' 
    and next.meta_value + INTERVAL 9 day >= CURDATE() 
and third.meta_key = 'll_customer_id' 
    and third.meta_value is not null;