MySQL查询结果返回意外数据

我正在尝试运行一个自定义报告的查询，该报告应返回符合五个条件的客户的数据，这些条件基于指定日期范围内的贷款还款类型。标准为

工资扣减

，

银行定期汇票

，

自助支付

，

期票

和

银行借记

。结果应返回来自每个指定条件的客户端数量计数。然而，这不是我目前得到的结果；正在针对此软件测试这些查询。结果取决于

自定义字段

和

自定义字段值

（指定要使用的还款类型）列。这就是我期望得到的结果的样子：

++++++++++++++++++++++++++++++++++++++++++++++++++++++
| LoanProduct           | RepaymentType    | Clients |
++++++++++++++++++++++++++++++++++++++++++++++++++++++
| JUMPSTART LOAN WEEKLY | Self-Pay         | 35      |
------------------------------------------------------
| PAYDAY LOAN MONTHLY   | Salary Deduction | 5       |
------------------------------------------------------
| MICRO-BIZ LOAN        | Bank Debit       | 26      |
------------------------------------------------------
| PAYDAY LOAN WEEKLY    | Self-Pay         | 1       |

  .......
and so on ...

到目前为止我尝试过的解决方案：

查询#1:
对于这个查询，我只是尝试返回所有没有特定还款类型计数的客户；它适用于这种情况

SELECT CONCAT(client.FIRSTNAME, ' ', client.LASTNAME) AS Client, 
    CONCAT(user.FIRSTNAME, ' ', user.LASTNAME) AS Originator, 
    loanproduct.PRODUCTNAME AS LoanProduct, customfieldvalue.VALUE AS RepaymentType
FROM client, user, customfieldvalue, loanaccount
INNER JOIN loanproduct ON loanaccount.PRODUCTTYPEKEY = loanproduct.ENCODEDKEY 
WHERE client.ASSIGNEDUSERKEY = user.ENCODEDKEY 
    AND loanaccount.ACCOUNTHOLDERKEY = client.ENCODEDKEY
    AND customfieldvalue.VALUE = "Bank Debit"
    AND loanaccount.DISBURSEMENTDATE BETWEEN "2012-01-01" AND "2013-01-31"
GROUP BY user.LASTNAME, client.LASTNAME

查询#1.1
将

或

添加到上面不会产生任何结果：

SELECT CONCAT(client.FIRSTNAME, ' ', client.LASTNAME) AS Client, 
    CONCAT(user.FIRSTNAME, ' ', user.LASTNAME) AS Originator, 
    loanproduct.PRODUCTNAME AS LoanProduct, customfieldvalue.VALUE AS RepaymentType
FROM client, user, customfieldvalue, loanaccount
INNER JOIN loanproduct ON loanaccount.PRODUCTTYPEKEY = loanproduct.ENCODEDKEY 
WHERE client.ASSIGNEDUSERKEY = user.ENCODEDKEY 
    AND loanaccount.ACCOUNTHOLDERKEY = client.ENCODEDKEY
    AND customfieldvalue.VALUE = "Bank Debit" OR customfieldvalue.VALUE = "Self-Pay"
    AND loanaccount.DISBURSEMENTDATE BETWEEN "2012-01-01" AND "2013-01-31"
GROUP BY user.LASTNAME, client.LASTNAME

查询#2
我甚至尝试使用

CASE

语句来执行此操作，但它只将

客户端的所有行作为
NULL
返回，并且需要大约12.1秒才能完成

SELECT
    loanproduct.PRODUCTNAME AS LoanProduct, customfieldvalue.VALUE AS RepaymentType,
    CASE
       WHEN customfieldvalue.VALUE = "Salary Deduction" THEN COUNT(CONCAT(client.FIRSTNAME, ' ', client.LASTNAME))
       WHEN customfieldvalue.VALUE = "Bank Standing Order" THEN COUNT(CONCAT(client.FIRSTNAME, ' ', client.LASTNAME))
       WHEN customfieldvalue.VALUE = "Self-Pay" THEN COUNT(CONCAT(client.FIRSTNAME, ' ', client.LASTNAME))
       WHEN customfieldvalue.VALUE = "Post Dated Cheques" THEN COUNT(CONCAT(client.FIRSTNAME, ' ', client.LASTNAME))
       WHEN customfieldvalue.VALUE = "Bank Debit" THEN COUNT(CONCAT(client.FIRSTNAME, ' ', client.LASTNAME))
    END AS Clients
FROM client, user, customfieldvalue, loanaccount
INNER JOIN loanproduct ON  loanaccount.PRODUCTTYPEKEY = loanproduct.ENCODEDKEY
WHERE client.ASSIGNEDUSERKEY = user.ENCODEDKEY
    AND loanaccount.ACCOUNTHOLDERKEY = client.ENCODEDKEY
    AND loanaccount.DISBURSEMENTDATE BETWEEN "2012-01-01" AND "2013-01-31"
GROUP BY user.LASTNAME, client.LASTNAME

我在这里做错了什么，阻止了我获得想要的结果？提前感谢。
报价单（操作顺序）在这里非常重要，您缺少它们，这就是问题所在

SELECT CONCAT(client.FIRSTNAME, ' ', client.LASTNAME) AS Client, 
    CONCAT(user.FIRSTNAME, ' ', user.LASTNAME) AS Originator, 
    loanproduct.PRODUCTNAME AS LoanProduct, customfieldvalue.VALUE AS RepaymentType
FROM client, user, customfieldvalue, loanaccount
INNER JOIN loanproduct ON loanaccount.PRODUCTTYPEKEY = loanproduct.ENCODEDKEY 
WHERE client.ASSIGNEDUSERKEY = user.ENCODEDKEY 
    AND loanaccount.ACCOUNTHOLDERKEY = client.ENCODEDKEY
    AND (customfieldvalue.VALUE = "Bank Debit" OR customfieldvalue.VALUE = "Self-Pay")
    AND loanaccount.DISBURSEMENTDATE BETWEEN "2012-01-01" AND "2013-01-31"
GROUP BY user.LASTNAME, client.LASTNAME

另一种方法是使用“IN（）

对于查询2，您需要添加括号，或在

语法中使用

：

AND customfieldvalue.VALUE in ('Bank Debit', 'Self-Pay')

与正确使用where语法一样重要的是修复
from
子句中的
join
语法：

FROM client join
     user
     on client.ASSIGNEDUSERKEY = user.ENCODEDKEY join
     loanproduct
     ON loanaccount.PRODUCTTYPEKEY = loanproduct.ENCODEDKEY and
        loanaccount.ACCOUNTHOLDERKEY = client.ENCODEDKEY CROSS JOIN
    customFieldValue
where loanaccount.DISBURSEMENTDATE BETWEEN "2012-01-01" AND "2013-01-31" and
      customfieldvalue.value in ('Bank Debit')

天哪，你马上就会发现可能有什么不对劲了。您通常不希望在设计良好的数据仓库中交叉连接表。CustomFieldValue是如何连接到其他表的？
有几个项目比较突出。
首先，似乎您正在尝试连接4个文件，但只定义了1个连接-有时在构建复杂连接时添加1个文件会有所帮助

此外，您正在使用GROUP BY，但没有聚合任何内容-您确定这就是您想要的吗？如果需要计数，可以使用
count（*）
，然后所有其他列都需要包含在GROUPBY子句中
 CustomFieldValue为用户提供了动态向表单添加特定字段的灵活性。在数据字典中，图表显示它们与其他表分离，因此任何表单都可以有CustomField。自定义值未连接到客户、贷款或任何其他实体？它连接到
客户
表。是的，这是我的意图。我最初有
计数（*）
，但我删除了它以显示实际客户的名称，这样我就可以通过软件的输出来验证返回的数据。
FROM client join
     user
     on client.ASSIGNEDUSERKEY = user.ENCODEDKEY join
     loanproduct
     ON loanaccount.PRODUCTTYPEKEY = loanproduct.ENCODEDKEY and
        loanaccount.ACCOUNTHOLDERKEY = client.ENCODEDKEY CROSS JOIN
    customFieldValue
where loanaccount.DISBURSEMENTDATE BETWEEN "2012-01-01" AND "2013-01-31" and
      customfieldvalue.value in ('Bank Debit')