Question

我有两个名为SavingAccountTransactions和LoanAccountTransactions的表。

两个表都有相同的列（fk_MemberId，fk_AgentId，TransactionDate）

样本数据

SavingAccountTransactions表

Id   fk_MemberId    fk_AgentId   TransactionDate  Amount
---  -----------    -----------  ---------------  -------
1      441             12           2014-12-30      100
2      452             6            2014-12-30      300

LoanAccountTransactions表

Id   fk_MemberId    fk_AgentId   TransactionDate  Amount
---  -----------    -----------  ---------------  -------
1      441             12           2014-12-30      500
2      452             6            2014-12-30      200

如何将SavingAccountTransactions和LoanAccountTransactions表结合起来，为特定成员在一行中获取 NoOfMembersVisited 的计数。

以下是我试过的查询

select u.Fullname as AgentName ,count (distinct t.fk_MemberId ) as NoOfMembersVisited
from dbo.SavingAccountTransactions T
inner join Users u on t.fk_AgentId=u.Id
where t.TransactionDate = CAST(GETDATE() AS DATE)                                                         
group by u.Fullname
Union all
select u.Fullname as AgentName, count (distinct l.fk_MemberId ) as NoOfMembersVisited
from  LoanAccountTransactions L
inner join Users u on L.fk_AgentId=u.Id
where l.TransactionDate = CAST(GETDATE() AS DATE)
group by u.Fullname

预期结果：

AgentName  NoOfMembersVisited
---------  -------------------
John             2
Kevin            1

etc....

Answer 1

因为您没有提供任何样本数据，所以很难知道您得到了什么。但我可能知道你的问题是什么。当您使用UNION ALL时，如果用户同时在这两个表中，则会重复这些用户。因为将UNION ALL更改为UNION的表格可能会有不同的计数。我想建议你做这样的事情：

;WITH CTE
AS
(
    select u.Fullname as AgentName,l.fk_MemberId
    from dbo.SavingAccountTransactions T
    inner join Users u on t.fk_AgentId=u.Id
    where t.TransactionDate = CAST(GETDATE() AS DATE) 
    UNION ALL
    select u.Fullname as AgentName,l.fk_MemberId
    from  LoanAccountTransactions L
    inner join Users u on L.fk_AgentId=u.Id
    where l.TransactionDate = CAST(GETDATE() AS DATE)
)
SELECT
    CTE.Fullname,
    COUNT(distinct CTE.fk_MemberId) as NoOfMembersVisited
FROM
    CTE
group by
    CTE.Fullname

来自多个表的记录计数

1 个答案: