Sql 与临时表的完全外部联接

我希望以这样的方式连接这三个表数据，即它总是根据哪个表有max记录和其他表（如果没有行或该表的min）的employee的乘积最大行数在列值中显示null

我无法使用左联接，因为我不知道哪个临时表可能有更多记录。

这是我当前数据的图像

我的预期输出应该是这样的图像

---

我会做类似的事情

declare @Tax Table 
 (
   RowNumber int , 
   FirstName nvarchar(50),
   MiddleName  nvarchar(50),
   LastName nvarchar(50),
   SSN nvarchar(50),
   EmployeeCode nvarchar(50),
   TaxName nvarchar(50),
   Amount decimal(18,2),   
   GrossPay decimal(18,2),
   CompanyId int,
   EmployeeId int
 )

 INSERT into @Tax 


                select row_number() OVER (PARTITION BY E.EmployeeId order by E.EmployeeId ) as RowNumber,FirstName,MiddleName,LastName,SSN,EmployeeCode,TaxName,TC.Amount,dbo.[GrossIncomeCalculation](E.EmployeeId) as GrossPay
                ,E.CompanyId,E.EmployeeId
                from Employee    as E 
                cross apply (
                                select TT.*
                                from dbo.[StateFixedTaxesCalculation](dbo.[GrossIncomeCalculation](E.EmployeeId),E.EmployeeId,E.CompanyId,1006) as TT
                                where TT.EmployeeId=E.EmployeeId and E.CompanyId=1
                            ) as TC 






declare @Earnings Table 
 (
   RowNumber int , 
   EmployeeId int,  
   EarningDescription nvarchar(50),  
   Amount decimal(18,2)

 )


            INSERT into @Earnings
            SELECT RowNumber,EC.EmployeeId,EarningDescription,Amount FROM Employee as E
            CROSS APPLY 
            (
            select EC.*
            from dbo.[EarningCalculation](E.EmployeeId,E.CompanyId) as EC
            WHERE E.CompanyId=1

            )   as EC 


                declare @Deductions Table 
             (
               RowNumber int , 
               EmployeeId int,  
               DeductionDescription nvarchar(50),  
               Amount decimal(18,2)

             )      
            INSERT INTO @Deductions 
            SELECT RowNumber,EDD.EmployeeId,DeductionDescription,Amount FROM Employee as E
            CROSS apply (
                        select ED.*
                        from dbo.[DeductionCalculation](E.EmployeeId,E.CompanyId) as ED
                        WHERE E.CompanyId=1

            ) as EDD

---

解释这样的结构会更容易。

我会这样做

declare @Tax Table 
 (
   RowNumber int , 
   FirstName nvarchar(50),
   MiddleName  nvarchar(50),
   LastName nvarchar(50),
   SSN nvarchar(50),
   EmployeeCode nvarchar(50),
   TaxName nvarchar(50),
   Amount decimal(18,2),   
   GrossPay decimal(18,2),
   CompanyId int,
   EmployeeId int
 )

 INSERT into @Tax 


                select row_number() OVER (PARTITION BY E.EmployeeId order by E.EmployeeId ) as RowNumber,FirstName,MiddleName,LastName,SSN,EmployeeCode,TaxName,TC.Amount,dbo.[GrossIncomeCalculation](E.EmployeeId) as GrossPay
                ,E.CompanyId,E.EmployeeId
                from Employee    as E 
                cross apply (
                                select TT.*
                                from dbo.[StateFixedTaxesCalculation](dbo.[GrossIncomeCalculation](E.EmployeeId),E.EmployeeId,E.CompanyId,1006) as TT
                                where TT.EmployeeId=E.EmployeeId and E.CompanyId=1
                            ) as TC 






declare @Earnings Table 
 (
   RowNumber int , 
   EmployeeId int,  
   EarningDescription nvarchar(50),  
   Amount decimal(18,2)

 )


            INSERT into @Earnings
            SELECT RowNumber,EC.EmployeeId,EarningDescription,Amount FROM Employee as E
            CROSS APPLY 
            (
            select EC.*
            from dbo.[EarningCalculation](E.EmployeeId,E.CompanyId) as EC
            WHERE E.CompanyId=1

            )   as EC 


                declare @Deductions Table 
             (
               RowNumber int , 
               EmployeeId int,  
               DeductionDescription nvarchar(50),  
               Amount decimal(18,2)

             )      
            INSERT INTO @Deductions 
            SELECT RowNumber,EDD.EmployeeId,DeductionDescription,Amount FROM Employee as E
            CROSS apply (
                        select ED.*
                        from dbo.[DeductionCalculation](E.EmployeeId,E.CompanyId) as ED
                        WHERE E.CompanyId=1

            ) as EDD

---

解释这样的结构会更容易。

您仍然可以使用完全联接，只需在第二个联接条件上使用

ISNULL

：

SELECT UserId, Amount, 1 TableType FROM @Tax
UNION
SELECT UserId, Amount, 2 TableType FROM @Earnings
UNION
SELECT UserId, Amount, 3 TableType FROM @Deductions

---

下面的工作示例（不过，除了连接所需的列之外，所有列都是空的

---

---

您仍然可以使用完全联接，只需在第二个联接条件下使用

ISNULL

：

SELECT UserId, Amount, 1 TableType FROM @Tax
UNION
SELECT UserId, Amount, 2 TableType FROM @Earnings
UNION
SELECT UserId, Amount, 3 TableType FROM @Deductions

---

下面的工作示例（不过，除了连接所需的列之外，所有列都是空的

---

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似乎你应该使用并集，而不是联接。似乎你应该使用并集，而不是联接。