Question

我试图从主表中选择不同的值，并从子表中重复值。我有4张桌子：

发票
invoiceLine
产品
业务伙伴

我的查询：

select 
c_invoice.c_invoice_ID,
c_bpartner.name as "Business Partner",
M_Product.name as "Product",
c_invoiceline.priceentered as "amount"
 from adempiere.c_invoice 
 left join adempiere.c_invoiceline on c_invoice.c_invoice_ID=c_invoiceline.c_invoice_ID
 left join adempiere.M_Product on c_invoiceline.M_Product_ID =M_Product.M_Product_ID
 left join adempiere.C_BPartner on c_invoice.c_bpartner_ID=c_bpartner.c_bpartner_id
 where c_invoice.sh_booking_ID=1000019 and c_invoice.c_doctypetarget_id=1000005

我的查询结果：

INVOICEID   BUSINESS Partner    PRODUCT     AMT 
1000005;    "Tehmoor";          "Charge 1"; 1200
1000005;    "Tehmoor";          "Standard"; 1500
1000006;    "Rafay";            "Charge 1"; 1200
1000006;    "Rafay";            "Standard"; 1100

和预期结果

INVOICEID   BUSINESS Partner    PRODUCT     AMT 
1000005;    "Tehmoor";          "Charge 1"; 1200
      ;      NULL;              "Standard"; 1500
1000006;    "Rafay";            "Charge 1"; 1200
       ;    NULL;               "Standard"; 1100

Answer 1

您可以尝试这样的事情：

select 
  CASE WHEN row_number() OVER (PARTITION BY mast.id) = 1 THEN
    mast.title
  ELSE NULL END as title,
  joined.measure
from mast
left join joined on (mast_id = mast.id)

我为它创建了一个fiddle，因此您可以检查我的示例架构。我认为用宿主语言处理这种要求会更好，因为在SQL中它有点棘手。

Answer 2

我在本地环境中重现了您的架构。以下是您可以使用该查询获得所需结果的信息。

SELECT
CASE WHEN (Rank() Over(ORDER BY i.c_invoice_id ASC)) = (Row_Number() Over (ORDER BY i.c_invoice_id ASC)) THEN pt.b_name ELSE NULL END AS "Business Partner",
CASE WHEN (Rank() Over(ORDER BY i.c_invoice_id ASC)) = (Row_Number() Over (ORDER BY i.c_invoice_id ASC)) THEN i.c_invoice_id ELSE NULL END AS Invoice_Id,
pr.b_name,
il.price  
FROM  invoice i
LEFT JOIN c_invoice_line il ON il.c_invoice_id = il.c_invoice_id
LEFT JOIN c_product pr ON il.product_line_id = pr.b_prod_id
LEFT JOIN c_bpartner pt ON pt.b_partner_id =  Trim(il.c_prod_id);

如果需要，请相应地更改表名和列名。

从主表中选择不同的值，从连接表中选择重复值

2 个答案: