Question

我这里有4个表，我需要将表中新输入的行值与另一行相乘，并使用CustomerId找到总和：

CustomerTable的：

CustomerId Name   EmailId
-------------------------
1          Paul   r@r.com
2          John   J@j.com

LoyaltyPointTable ：

LoyaltyPointsId LoyaltyType     Points
---------------------------------------
1               Registration       10
2               Loginstatus         1
3               Downloading        10
4               Redemming           1
5               Sharing            20
6               Refer              10

LoyaltyDetailsTable ：

 LoyaltyDetailsId LoyaltyPointsId CustomerId Dates
 -------------------------------------------------
  1                    1            1       2015-01-22 
  2                    2            1       2015-01-22 
  3                    3            2       2015-01-22
  4                    3            1       2015-01-22 
  5                    4            1       2015-01-22
  6                    4            1       2015-01-24 
  7                    5            1       2015-01-24

此查询适用于每个LoyaltyType

的总和

SELECT   
   LoayaltyPointsTable.LoyaltyType,
   COUNT(CustomerTable.CustomerId) AS UserActions,
   SUM(LoayaltyPointsTable.Points) AS TotalPoints 
FROM 
   LoayaltyPointsTable 
JOIN 
   LoyaltyDetailsTable ON LoayaltyPointsTable.LoyaltyPointsId = LoyaltyDetailsTable.LoyaltyPointsId
JOIN
   CustomerTable ON CustomerTable.CustomerId = LoyaltyDetailsTable.CustomerId 
WHERE
   CustomerTable.CustomerId = 1
GROUP BY
   LoyaltyDetailsTable.CustomerId ,LoayaltyPointsTable.LoyaltyType

RedeemPointsTable下面的

与LoyaltyPointTable中的行兑换相关：

RedeemPointsTable ：

 RedeemPointsId CustomerId ShopName BillNo Amount
 ------------------------------------------------
 1                   1      Mall x  4757    100
 3                   1      Mall y  SH43    50
 4                   1      Mall x  7743    10
 6                   1      Mall x  s34a    60

我期待的是在计算总和之前，我希望在Amount的{{1}}中的(100+50+10+60) * 1和Redeeming列添加每个{{的总分数LoyaltyPointTable 1}}

预期输出

CustomerId

用户操作计数为4，它基于他在LoyaltyType UserActions TotalPoints ------------------------------------- Downloading 1 10 Loginstatus 1 1 Redemming 4 (100+50+10+60)*1(here using Amount in RedeemPointsTable) Refer 1 10 Registration 1 10 Sharing 1 20中输入的Amount

我是否需要在RedeemPointsTable中添加外键列进行更改，还是可以指出我的错误？

任何帮助都会很棒。

Answer 1

这是返回所需结果的查询：

SELECT 
   LoyaltyPointTable.LoyaltyType, 
   CASE 
      WHEN LoyaltyPointTable.LoyaltyPointsId=4 THEN (SELECT COUNT(amount) FROM RedeemPointsTable where CustomerId=1) 
      ELSE COUNT(CustomerTable.CustomerId) 
   END as UserActions, 
   CASE 
      WHEN LoyaltyPointTable.LoyaltyPointsId=4 THEN (SELECT SUM(amount) FROM RedeemPointsTable where CustomerId=1)*Points
      ELSE SUM(LoyaltyPointTable.Points) 
    END as TotalPoints
FROM 
   LoyaltyPointTable 
JOIN 
   LoyaltyDetailsTable ON LoyaltyPointTable.LoyaltyPointsId =     LoyaltyDetailsTable.LoyaltyPointsId
JOIN
   CustomerTable ON CustomerTable.CustomerId = LoyaltyDetailsTable.CustomerId 
WHERE
   CustomerTable.CustomerId = 1
GROUP BY
   LoyaltyDetailsTable.CustomerId ,LoyaltyPointTable.LoyaltyType

您可以查看here

将新输入的行与另一列值相乘，并在SQL中查找总和

1 个答案: