Question

我是Oracle SQL的新手，我的问题可能看起来很愚蠢但我在解决问题时遇到了一些困难。

现状：我有以下表格：供应商，债务人，发票

每个供应商都有各种债务人，每个债务人都有各种发票。我想创建一个评估，向我展示以下场景：

来自供应商的所有债务人的列表。我还希望在列表中看到债务人曾经没有支付他的发票。我在表Invoice中将此信息称为＆＃34; payed＆＃34;可能的值为0（已付款）和1（未付款）。我只想在列表中看到债务人ONCE，所以如果只有一张发票是1，它应该显示我＆＃34; 1＆＃34;或＆＃34;未支付＆＃34;在列表中。现在，当债务人有100张发票时，它会向我显示债务人100倍的信息＆＃34; 0＆＃34;或＆＃34; 1＆＃34;。

目前：

     SELECT company.company_id,   
         company.companyname_1,   
         supplier.supplier_id,   
         supplier.suppliername_1,   
         debtor.debtor_id_from_supplier,   
         debtor_ext.debtorname_1,   
         debtor_ext.street,   
         debtor_ext.street_number,   
         debtor_ext.postcode,   
         debtor_ext.city,   
         debtor.approved_limit,   
         debitor.limit_left,   
         debitor.limit_status,   
         debitor.limit_type,   
         debitor.prosecution,
         CASE
            WHEN invoice.payed = 0 THEN 'Yes'
            ELSE 'No'
         END as deb_payment
    FROM debtor, 
         debtor_ext,   
         company,   
         supplier,
         invoice
   WHERE ( company.company_id = supplier.company_id ) and  
         ( supplier.supplier_id = debtor.supplier_id ) and  
         ( debtor.debtor_id = debtor_ext.debtor_id ) and  
         ( debtor.supplier_id = invoice.supplier_id ) and  
         ( debtor.debtor_id_from_supplier = invoice.debtor_id_from_supplier )

CODE CORRECTED！ 希望你们能帮帮我

Answer 1

首先，在您的查询中，您正在执行cross join这不是必需的，也会影响性能。我建议你在这里使用Inner Join。

此外，由于未提供架构，我正在为以下架构提供解决方案：

<强>供应商：

Supplier_Id (PK) | Supplier_Name

<强>债务人：

Debtor_Id (PK) | Debtor_Name | Supplier_Id (FK)

<强>发票：

Invoice_Id (PK) | Supplier_Id (FK) | Debtor_Id (FK) | Amount | Payed

<强>查询：

Select company.company_id,   
        company.companyname_1,   
        s.supplier_id,   
        s.suppliername_1,   
        d.debtor_id_from_supplier,   
        d.debtorname_1,   
        d.street,   
        d.street_number,   
        d.postcode,   
        d.city,   
        d.approved_limit,   
        d.limit_left,   
        d.limit_status,   
        d.limit_type,   
        d.prosecution,
        tmp.deb_payment
 From
 (
 SELECT d.supplier_id,
        d.debtor_id,           
    (
     CASE
        WHEN min(i.payed) <> max(i.payed) Then 'Not Payed'
        ELSE 'Payed'
     END
    )as deb_payment
FROM supplier s
inner join debtor d
on s.supplier_id = d.supplier_id
inner join invoice i
on i.supplier_id = d.supplier_id
and i.debtor_id = d.debtor_id
Group by d.supplier_id,d.debtor_id
) tmp
inner join supplier s    
on s.supplier_id = tmp.supplier_id
inner join company
on company.company_id = s.company_id   
inner join debtor d
on s.supplier_id = d.supplier_id
inner join debtor_ext de
d.debtor_id = de.debtor_id
;

希望它有所帮助！

Oracle SQL - 如果＆gt;总结并显示文本0

1 个答案: