mySQL中的两个数字相乘

我使用的是phpMyAdmin，我有两个表：

销售税

|--------|----------|------------|
| STX_Id | STX_Name | STX_Amount |
|--------|----------|------------|
|      1 |    Tax 1 |       5.00 |
|      2 |    Tax 2 |      13.50 |
|--------|----------|------------|

|--------|---------------|------------|------------|--------------|----------|---------------------|
| BIL_Id | BIL_BookingId | BIL_Date   | BIL_Status | BIL_Quantity | BIL_Rate | BIL_ApplicableTaxes |
|--------|---------------|------------|------------|--------------|----------|---------------------|
|      1 |             2 | 2018-03-06 | notcharged |           2  |   100.00 |                   1 |
|      2 |             2 | 2018-03-07 | notcharged |           3  |   105.00 |                 1,2 |
|--------|---------------|------------|------------|--------------|----------|---------------------|

\uuuuuuuuuuuuuuuuuu可计费数据

|--------|----------|------------|
| STX_Id | STX_Name | STX_Amount |
|--------|----------|------------|
|      1 |    Tax 1 |       5.00 |
|      2 |    Tax 2 |      13.50 |
|--------|----------|------------|

|--------|---------------|------------|------------|--------------|----------|---------------------|
| BIL_Id | BIL_BookingId | BIL_Date   | BIL_Status | BIL_Quantity | BIL_Rate | BIL_ApplicableTaxes |
|--------|---------------|------------|------------|--------------|----------|---------------------|
|      1 |             2 | 2018-03-06 | notcharged |           2  |   100.00 |                   1 |
|      2 |             2 | 2018-03-07 | notcharged |           3  |   105.00 |                 1,2 |
|--------|---------------|------------|------------|--------------|----------|---------------------|

---

我想每天在

\uuuuuu BillableDatas

中列出一个可计费物品的列表，具体取决于物品的状态（已计费与未计费）

比如说：

|------------|-----------------|--------------------|------------------|--------------------|
|    Date    | BIL_Sum_Charged | BIL_Sum_Notcharged | Taxes_ForCharged | TaxesForNotCharged |
|------------|-----------------|--------------------|------------------|--------------------|
| 2018-03-06 |            0.00 |             200.00 |             0.00 |              10.00 |
| 2018-03-07 |            0.00 |             315.00 |             0.00 |             58.275 |
|------------|-----------------|--------------------|------------------|--------------------|

---

我实际拥有的：

SELECT b.BIL_Date,
SUM(case when b.BIL_Status = "charged" then b.BIL_Rate else 0 end
 / (1 + LENGTH(b.BIL_ApplicableTaxes)
        - LENGTH( REPLACE ( b.BIL_ApplicableTaxes, ",", "") ) ))
   as BIL_Sum_Charged, 
 SUM(case when b.BIL_Status = "notcharged" then b.BIL_Rate else 0 end
 / (1 + LENGTH(b.BIL_ApplicableTaxes)
        - LENGTH( REPLACE ( b.BIL_ApplicableTaxes, ",", "") )))
      as BIL_Sum_Notcharged,
  SUM(case when b.BIL_status = "charged" then s.STX_Amount else 0 end) 
      as STX_TAX_Charged,
  SUM(case when b.BIL_status = "notcharged" then s.STX_Amount else 0 end) 
     as STX_TAX_NotCharged
 FROM ___BillableDatas b
 INNER JOIN ___SalesTaxes s
 ON FIND_IN_SET(s.STX_id, b.BIL_ApplicableTaxes) > 0
 WHERE b.BIL_HotelId='cus_CNHLMiMOzP5cuM' 
 AND b.BIL_BookingId='2' 
 GROUP BY b.BIL_Date 
 ORDER BY b.BIL_Date ASC

---

此查询的问题是我没有正确的

BIL\u sum\u Charged

和

BIL\u sum\u NotCharged

的总和，因为总和没有乘以

BIL\u Quantity

列

例如，2018-03-07年，我的

105

而

315

的

BIL\u Sum\u Notcharged

。最后的税额也是一样的

请问我的错误在哪里

请参阅SQL FIDLE：

---

非常感谢您的帮助。

经过讨论，这似乎是您所需要的。希望这有帮助

SELECT b.BIL_Date,
SUM(case when b.BIL_Status = "charged" then b.BIL_Rate else 0 end
 / (1 + LENGTH(b.BIL_ApplicableTaxes)
        - LENGTH( REPLACE ( b.BIL_ApplicableTaxes, ",", "") ) )) * b.BIL_Quantity
   as BIL_Sum_Charged, 
 SUM(case when b.BIL_Status = "notcharged" then b.BIL_Rate else 0 end
 / (1 + LENGTH(b.BIL_ApplicableTaxes)
        - LENGTH( REPLACE ( b.BIL_ApplicableTaxes, ",", "") ))) * b.BIL_Quantity
      as BIL_Sum_Notcharged,
  SUM(case when b.BIL_status = "charged" then s.STX_Amount else 0 end) * (SUM(case when b.BIL_Status = "charged" then b.BIL_Rate else 0 end
 / (1 + LENGTH(b.BIL_ApplicableTaxes)
        - LENGTH( REPLACE ( b.BIL_ApplicableTaxes, ",", "") ) )) * b.BIL_Quantity) / 100
      as STX_TAX_Charged,
  SUM(case when b.BIL_status = "notcharged" then s.STX_Amount else 0 end) * ( SUM(case when b.BIL_Status = "notcharged" then b.BIL_Rate else 0 end
 / (1 + LENGTH(b.BIL_ApplicableTaxes)
        - LENGTH( REPLACE ( b.BIL_ApplicableTaxes, ",", "") ))) * b.BIL_Quantity) / 100
     as STX_TAX_NotCharged
 FROM ___BillableDatas b
 INNER JOIN ___SalesTaxes s
 ON FIND_IN_SET(s.STX_id, b.BIL_ApplicableTaxes) > 0
 WHERE b.BIL_HotelId='cus_CNHLMiMOzP5cuM' 
 AND b.BIL_BookingId='2' 
 GROUP BY b.BIL_Date 
 ORDER BY b.BIL_Date ASC;

---

根据讨论进行编辑

你为什么认为你应该有

315

而不是

105

？因为，从我的数据来看，我应该有

2

项目成本

105

，而我的

bilu数量在
3
相等。3*105=315. 报告应将项目成本与
BIL\u quantity
中输入的数量相加/相乘（如果b.BIL\u Status=“notcharged”则b.BIL\u Rate else 0 end/（1+长度（b.BIL\u applicatabletaxes）-长度（替换为b.BIL\u applicatabletaxes，，，））

在该日期的两行中添加两次，然后除以2。

*3

在哪里？这是我不知道怎么做的。除了乘法运算之外，我的实际查询看起来很有效。谢谢你的帮助。税额是错误的。对于2018-03-07，我应该是

58.27

，而不是

55.5

，因为这两种税的总和是

18.5

18.5%的315=58.27

13.5+5=18.5*3=55.5您是如何得到58.27的？很抱歉，缺少信息。我的税率是

5%

和

13.5%

。这是百分比，不是总和。因此

5%+13.5%=18.5%

和

18.5%的315=58.27

。如果不清楚，请告诉我。谢谢，现在已经清楚了。这不是您在查询中所做的。让我来解决它。更新了答案。