複雜的MySQL查詢：使用視圖（數據表......）的解決方案

Question

我需要在php腳本中使用複雜的查詢與連接，子查詢等來爲數據表服務器端進程生成Json。 Datatables不接受子查詢，所以我需要一個「扁平」查詢。我想過生成一個視圖，但是在MySQL視圖上不接受子查詢！ 這是MySQL查詢。你會推薦什麼 ？

SELECT a.Customers 
    ,a.Agent 
    ,a.status_name AS Current_Status 
    ,round(c.LTGGR - e.LT_TotBonus, 0) AS LT_NGR 
    ,CONCAT (
     round(e.LT_TotBonus/c.LTRM * 100, 0) 
     ,'%' 
     ) AS LT_Bonus_RM_per 
    ,CONCAT (
     'x' 
     ,round(c.LTBETS/(c.LTRM + e.LT_TotBonus), 0) 
     ) AS LT_Wagering 
    ,coalesce(d.Last_30D_RM, 0) AS Last_30D_RM 
    ,coalesce(d.Last_30D_NGR, 0) AS Last_30D_NGR 
    ,coalesce(g.CashBack_Last30D, 0) AS Cash_Back_30D 
    ,CONCAT (
     (f.cash_back_BO_per * 100) 
     ,'%' 
     ) AS status_cash_Back_BO_per 
    ,CONCAT (
     f.cash_back_per * 100 
     ,'%' 
     ) AS cash_back_percent 
    ,CASE 
     WHEN f.cash_back_per = 0 
      THEN 0 
     WHEN c.LTGGR - e.LT_TotBonus < 0 
      THEN 0 
     WHEN d.Last_30D_RM < 0 
      THEN 0 
     WHEN e.LT_TotBonus/c.LTRM * 100 >= f.cash_back_BO_per * 100 
      THEN 0 
     WHEN round(d.Last_30D_NGR * f.cash_back_per, 0) - coalesce(g.CashBack_Last30D, 0) < 0 
      THEN 0 
     WHEN isnull(d.Last_30D_NGR) 
      THEN 0 
     WHEN d.Last_30D_NGR < 0 
      THEN 0 
     ELSE round(d.Last_30D_NGR * f.cash_back_per, 0) 
     END AS cash_back_calc 
    ,CASE 
     WHEN f.cash_back_per = 0 
      THEN 'No Cash Back for Status' 
     WHEN c.LTGGR - e.LT_TotBonus < 0 
      THEN 'LT NGR <0' 
     WHEN d.Last_30D_RM < 0 
      THEN 'No RM Deposit in 30D' 
     WHEN e.LT_TotBonus/c.LTRM * 100 >= f.cash_back_BO_per * 100 
      THEN 'Above LT Bonus Percentage' 
     WHEN coalesce(g.CashBack_Last30D, 0) > 0 
      AND round(d.Last_30D_NGR * f.cash_back_per, 0) - coalesce(g.CashBack_Last30D, 0) < 0 
      THEN 'CashBack in 30D> Cash Back Calculated' 
     WHEN isnull(d.Last_30D_NGR) 
      THEN 'No NGR in 30D' 
     WHEN d.Last_30D_NGR < 0 
      THEN 'Negative NGR in 30D' 
     ELSE '' 
     END AS note 
FROM (
    (
     SELECT * 
     FROM players_levels 
     WHERE date_format(Date_Status, '%Y-%m') = (
       SELECT date_format(max(players_levels.Date_Status), '%Y-%m') 
       FROM players_levels 
       ) 
     GROUP BY Customers 
     ) a LEFT JOIN (
     SELECT * 
     FROM players_levels 
     WHERE date_format(Date_Status, '%Y-%m') = (
       SELECT date_format(max(players_levels.Date_Status) - INTERVAL 1 MONTH, '%Y-%m') 
       FROM players_levels 
       ) 
     ) b ON a.Customers = b.Customers 
    LEFT JOIN (
     SELECT Customers 
      ,sum(Total_Win_Loss) AS LTGGR 
      ,sum(Real_Money) AS LTRM 
      ,sum(Total_Bets) AS LTBETS 
     FROM Online_customer_activity_v2 
     GROUP BY Customers 
     ) c ON a.Customers = c.Customers 
    LEFT JOIN (
     SELECT Customers 
      ,sum(Real_Money) AS Last_30D_RM 
      ,sum(Total_Win_Loss) - sum(_Bonuses) AS Last_30D_NGR 
     FROM Online_customer_activity_v2 
     WHERE Online_customer_activity_v2.DATE >= (NOW() - INTERVAL 1 MONTH) 
     GROUP BY Customers 
     ) d ON a.Customers = d.Customers 
    LEFT JOIN (
     SELECT Account 
      ,sum(CASE 
        WHEN Method LIKE '%BONUS%' 
         AND (Method NOT LIKE '%CASHBACKBONUS%') 
         THEN Amount 
        ELSE 0 
        END) LT_Bo_No_CashB 
      ,sum(CASE 
        WHEN Method LIKE 'CASHBACKBONUS' 
         THEN Amount 
        ELSE 0 
        END) LT_CashBack 
      ,sum(CASE 
        WHEN Method LIKE '%BONUS%' 
         AND (Method NOT LIKE '%CASHBACKBONUS%') 
         THEN Amount 
        ELSE 0 
        END) + sum(CASE 
        WHEN Method LIKE 'CASHBACKBONUS' 
         THEN Amount 
        ELSE 0 
        END) AS LT_TotBonus 
     FROM `Online_dailyfinance_v2` 
     GROUP BY Account 
     ) e ON a.Customers = e.Account 
    LEFT JOIN (
     SELECT loyalty_points.status_name 
      ,loyalty_points.cash_back_per 
      ,loyalty_points.cash_back_BO_per 
     FROM loyalty_points 
     ) f ON a.status_name = f.status_name 
    LEFT JOIN (
     SELECT Account 
      ,sum(CASE 
        WHEN Method LIKE 'CASHBACKBONUS' 
         THEN Amount 
        ELSE 0 
        END) AS CashBack_Last30D 
     FROM `Online_dailyfinance_v2` 
     WHERE Online_dailyfinance_v2.DATE >= (NOW() - INTERVAL 1 MONTH) 
     GROUP BY Account 
     ) g ON a.Customers = g.Account 
    ) 
ORDER BY c.LTRM DESC 

Answer 1

@Renaud，我讚揚你在創建這個雄心勃勃的查詢中的持久性。突出的一點是你必須做「LIKE」語句。我用很多「參考表」和「TINYINT」作爲「文本」的關鍵。所以我可能會把「5」作爲「CASHBACKBONUS」和「3」的關鍵，以此作爲簡單的「獎勵」的關鍵。你看到這可以簡單的事情？我希望腳本壞小子的腳本不會投下我的提示/回答，但是當我遇到需要這樣查詢的情況時，通常最終會創建包含我需要的數據範圍的彙總表。這並不常見，但偶爾需要。如果它使編碼更容易，我甚至會違反第三種正常形式（哦，HORROR！）。但我是控制我的數據庫的人，所以我不知道你是否可以進行這些修改。我一直在做數據庫的東西25年以上，所以把它看成你認爲值得的東西。