Question

我正在尝试查询xml列等...以下查询工作正常...

SELECT
            OrderID,
            AccountNumber, 
            ItemID,
            substring(replace(lower(s.Street),' ',''),1,8) 
                + substring(replace(lower(s.City),' ',''),1,8) 
                + substring(replace(lower(s.State),' ',''),1,8) 
                + substring(replace(s.ZipCode,' ',''),1,5)AddressHash,
            ShipName,
            Street,
            Street2
            City,
            State,
            ZipCode,
            OrderDate
    FROM   (SELECT UpwardOrderID, AccountNumber, UpwardLeagueID,
                    /* NOTE THAT THIS SYNTAX WORKS ONLY WORKS BECAUSE THE NODES ARE SINGLETONS. */
                   x.value('(./ShipTo/Name)[1]', 'VARCHAR(255)')                                                AS ShipName,
                   x.value('(./ShipTo/Street1)[1]', 'VARCHAR(255)')                                             AS Street,
                   x.value('(./ShipTo/Street2)[1]', 'VARCHAR(255)')                                             AS Street2,
                   x.value('(./ShipTo/Subdivision1)[1]', 'VARCHAR(255)')                                        AS City,
                   x.value('(./ShipTo/Subdivision2)[1]', 'VARCHAR(255)')                                        AS State,
                   x.value('(./ShipTo/PostalCode)[1]', 'VARCHAR(255)')                                          AS ZipCode,
                   x.value('(./Order/ClientOrderDate)[1]', 'DATETIME')                                          AS OrderDate
                   --x.value('(./ShippingMethods/ShippingMethod/ID)[../Selected/text()=1]','VARCHAR(255)')
            FROM   av_order CROSS APPLY orderXML.nodes('/Order/ShippingInformation') t(x)
            WHERE orderXML Is Not Null) s

除了我尝试在FROM子查询中选择的最后一列之外，此查询工作正常。

不同之处在于列（ShippingMethod）不是单身。 XML包含所有送货方式，我想选择SELECTED送货方式的ID。以下是XML的那部分内容......

<Order>...
    <ShippingInformation>
        <ShipTo>
            <Name>DONT SHOW</Name>
            <Attention>DONT SHOW</Attention>
            <Street1>DONT SHOW</Street1>
            <Street2 />
            <Subdivision1>DONT SHOW</Subdivision1>
            <Subdivision2>IL</Subdivision2>
            <PostalCode>62092</PostalCode>
            <CountryCode>US</CountryCode>
            <AllowEmptyShipTo>0</AllowEmptyShipTo>
            <ContactInfo>DONT SHOW</ContactInfo>
        </ShipTo>
        <ShippingMethods>
            <ShippingMethod>
                <ID>UPSGROUND</ID>
                <Selected>1</Selected>
                <Cost>134.08</Cost>
            </ShippingMethod>
            <ShippingMethod>
                <ID>PICKUP</ID>
                <Selected>0</Selected>
                <Cost>0</Cost>
            </ShippingMethod>
            <ShippingMethod>
                <ID>UPS3DAY</ID>
                <Selected>0</Selected>
                <Cost>288.46</Cost>
            </ShippingMethod>
            <ShippingMethod>
                <ID>UPS2DAY</ID>
                <Selected>0</Selected>
                <Cost>347.91</Cost>
            </ShippingMethod>
            <ShippingMethod>
                <ID>UPSNEXTBUSDAY</ID>
                <Selected>0</Selected>
                <Cost>956.73</Cost>
            </ShippingMethod>
        </ShippingMethods>
    </ShippingInformation>
...</Order>

如何选择SELECTED送货方式ID？

赛斯

Answer 1

您可以在xQuery表达式中使用针对Selected的谓词。

这将选择第ShippingMethod个节点，其中Selected的值为1。

x.value('(./ShippingMethods/ShippingMethod[Selected = 1]/ID)[1]','VARCHAR(255)')

如果列不是单例，如何从sql server中的xml列中进行选择

1 个答案: