当所有相关子查询返回空时，如何排除行

时间：2016-08-05 19:39:46

标签： sql-server-2012 null subquery

我有一份供应商的零件清单，我希望看到自1月1日以来我们买卖的东西。我为销售和采购信息创建了子查询。

结果有四种可能性：

  1. 销售数量=采购数量
  2. 销售数量＆gt;购买数量（包括NULL购买数量）
  3. 销售数量＆lt;购买数量（包括NULL销售数量）
  4. 销售和采购数量均为空

    5. 如果销售和采购数量均为NULL，如何保留那些可能具有NULL销售数量或采购数量的行，我如何排除行？附上图像以显示这些场景的示例。

    我审核了this帖子，但它似乎不适用，因为我的列不必相等。

    SELECT DISTINCT       
p21_view_supplier.supplier_id AS [Supp ID],
p21_view_supplier.supplier_name AS Supplier, 
p21_view_inv_mast.item_id AS [Item ID], 
p21_view_inv_mast.item_desc AS [Item Desc],
p21_view_inv_loc.location_id AS [Location ID],
invoice_data.[Total Shipped by Sales Loc],
purchase_data.[PO Qty Ordered]

FROM            
p21_view_supplier 
INNER JOIN p21_view_inventory_supplier ON p21_view_supplier.supplier_id = p21_view_inventory_supplier.supplier_id 
INNER JOIN p21_view_inv_mast ON p21_view_inventory_supplier.inv_mast_uid = p21_view_inv_mast.inv_mast_uid
INNER JOIN p21_view_inv_loc ON p21_view_inv_mast.inv_mast_uid = p21_view_inv_loc.inv_mast_uid
--Invoices
LEFT JOIN (
    SELECT        
    p21_view_invoice_hdr.sales_location_id, 
    p21_view_invoice_line.item_id,
    p21_view_invoice_line.supplier_id, 
    p21_view_invoice_line.inv_mast_uid, 
    SUM(p21_view_invoice_line.qty_shipped) AS [Total Shipped by Sales Loc]

    FROM            
    p21_view_invoice_hdr 
    INNER JOIN p21_view_invoice_line ON p21_view_invoice_hdr.invoice_no = p21_view_invoice_line.invoice_no

    WHERE        
    (p21_view_invoice_hdr.invoice_date >= CONVERT(DATETIME, '2016-01-01 00:00:00', 102))

    GROUP BY
    p21_view_invoice_hdr.sales_location_id, 
    p21_view_invoice_line.item_id, 
    p21_view_invoice_line.supplier_id,
    p21_view_invoice_line.inv_mast_uid
    ) invoice_data ON p21_view_supplier.supplier_id = invoice_data.supplier_id
        AND p21_view_inv_mast.inv_mast_uid = invoice_data.inv_mast_uid
        AND p21_view_inv_loc.location_id = invoice_data.sales_location_id
--Purchasing
LEFT JOIN (
    SELECT        
    p21_view_po_hdr.supplier_id, 
    p21_view_po_hdr.location_id AS [PO Loc ID], 
    SUM(p21_view_po_line.qty_ordered) AS [PO Qty Ordered], 
    p21_view_po_line.item_id AS [Item ID],
    p21_view_po_line.inv_mast_uid

    FROM            
    p21_view_po_hdr 
    INNER JOIN p21_view_po_line ON p21_view_po_hdr.po_no = p21_view_po_line.po_no

    WHERE        
    (p21_view_po_hdr.date_created >= CONVERT(DATETIME, '2016-01-01 00:00:00', 102)) 
    AND (p21_view_po_hdr.delete_flag IS NULL OR
                             p21_view_po_hdr.delete_flag = 'N') 
    AND (p21_view_po_line.delete_flag IS NULL OR
                             p21_view_po_line.delete_flag = 'N') 
    AND (p21_view_po_line.cancel_flag IS NULL OR
                             p21_view_po_line.cancel_flag = 'N') 
    AND (p21_view_po_hdr.cancel_flag IS NULL OR
                             p21_view_po_hdr.cancel_flag = 'N')

    GROUP BY 
    p21_view_po_hdr.supplier_id, 
    p21_view_po_hdr.location_id, 
    p21_view_po_line.item_id,
    p21_view_po_line.inv_mast_uid
    ) purchase_data ON p21_view_supplier.supplier_id = purchase_data.supplier_id
        AND p21_view_inv_mast.inv_mast_uid = purchase_data.inv_mast_uid
        AND p21_view_inv_loc.location_id = purchase_data.[PO Loc ID]

WHERE        
(p21_view_supplier.supplier_id = 8761)
AND (p21_view_inv_mast.delete_flag = 'N')

ORDER BY 
p21_view_inv_mast.item_id,
p21_view_inv_loc.location_id

1 个答案:

答案 0 :(得分：0)

假设两个派生表中至少有一个不可为空的列，您可以简单地向外部查询where子句添加一个条件，只有在派生的至少一个非可空列中才会求值为true表格不为空。

在这种情况下，我假设两个派生表的非可空列都相同，并且它是supplier_id，所以我在where子句中添加了以下条件：

AND NOT (purchase_data.supplier_id is null and invoice_data.supplier_id is null)

完整查询：

SELECT DISTINCT       
p21_view_supplier.supplier_id AS [Supp ID],
p21_view_supplier.supplier_name AS Supplier, 
p21_view_inv_mast.item_id AS [Item ID], 
p21_view_inv_mast.item_desc AS [Item Desc],
p21_view_inv_loc.location_id AS [Location ID],
invoice_data.[Total Shipped by Sales Loc],
purchase_data.[PO Qty Ordered]

FROM            
p21_view_supplier 
INNER JOIN p21_view_inventory_supplier ON p21_view_supplier.supplier_id = p21_view_inventory_supplier.supplier_id 
INNER JOIN p21_view_inv_mast ON p21_view_inventory_supplier.inv_mast_uid = p21_view_inv_mast.inv_mast_uid
INNER JOIN p21_view_inv_loc ON p21_view_inv_mast.inv_mast_uid = p21_view_inv_loc.inv_mast_uid
--Invoices
LEFT JOIN (
    SELECT        
    p21_view_invoice_hdr.sales_location_id, 
    p21_view_invoice_line.item_id,
    p21_view_invoice_line.supplier_id, 
    p21_view_invoice_line.inv_mast_uid, 
    SUM(p21_view_invoice_line.qty_shipped) AS [Total Shipped by Sales Loc]

    FROM            
    p21_view_invoice_hdr 
    INNER JOIN p21_view_invoice_line ON p21_view_invoice_hdr.invoice_no = p21_view_invoice_line.invoice_no

    WHERE        
    (p21_view_invoice_hdr.invoice_date >= CONVERT(DATETIME, '2016-01-01 00:00:00', 102))

    GROUP BY
    p21_view_invoice_hdr.sales_location_id, 
    p21_view_invoice_line.item_id, 
    p21_view_invoice_line.supplier_id,
    p21_view_invoice_line.inv_mast_uid
    ) invoice_data ON p21_view_supplier.supplier_id = invoice_data.supplier_id
        AND p21_view_inv_mast.inv_mast_uid = invoice_data.inv_mast_uid
        AND p21_view_inv_loc.location_id = invoice_data.sales_location_id
--Purchasing
LEFT JOIN (
    SELECT        
    p21_view_po_hdr.supplier_id, 
    p21_view_po_hdr.location_id AS [PO Loc ID], 
    SUM(p21_view_po_line.qty_ordered) AS [PO Qty Ordered], 
    p21_view_po_line.item_id AS [Item ID],
    p21_view_po_line.inv_mast_uid

    FROM            
    p21_view_po_hdr 
    INNER JOIN p21_view_po_line ON p21_view_po_hdr.po_no = p21_view_po_line.po_no

    WHERE        
    (p21_view_po_hdr.date_created >= CONVERT(DATETIME, '2016-01-01 00:00:00', 102)) 
    AND (p21_view_po_hdr.delete_flag IS NULL OR
                             p21_view_po_hdr.delete_flag = 'N') 
    AND (p21_view_po_line.delete_flag IS NULL OR
                             p21_view_po_line.delete_flag = 'N') 
    AND (p21_view_po_line.cancel_flag IS NULL OR
                             p21_view_po_line.cancel_flag = 'N') 
    AND (p21_view_po_hdr.cancel_flag IS NULL OR
                             p21_view_po_hdr.cancel_flag = 'N')

    GROUP BY 
    p21_view_po_hdr.supplier_id, 
    p21_view_po_hdr.location_id, 
    p21_view_po_line.item_id,
    p21_view_po_line.inv_mast_uid
    ) purchase_data ON p21_view_supplier.supplier_id = purchase_data.supplier_id
        AND p21_view_inv_mast.inv_mast_uid = purchase_data.inv_mast_uid
        AND p21_view_inv_loc.location_id = purchase_data.[PO Loc ID]

WHERE        
(p21_view_supplier.supplier_id = 8761)
AND (p21_view_inv_mast.delete_flag = 'N')
AND NOT (purchase_data.supplier_id is null and invoice_data.supplier_id is null)    
ORDER BY 
p21_view_inv_mast.item_id,
p21_view_inv_loc.location_id
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