Question

我在SQL Server的表列中有这个XML：

<root>
    <Request>
        <RequestData>
            <VendorLeadList>
                <VendorLeadItem>
                    <CampaignOfferTypeID>REN</CampaignOfferTypeID>
                    <LeadDispositionID>Lead</LeadDispositionID>
                    <Jurisdiction>NY</Jurisdiction>
                    <FirstName>Shikasta</FirstName>
                    <LastName>Kashti</LastName>
                    <MessageId>1347_1483825159115_c8273</MessageId>
                </VendorLeadItem>
            </VendorLeadList>
        </RequestData>
        <DualMessageID/>
        <AzureBlobFile/>
        <AzureBlobImageList/>
    </Request>
</root>

我想查询与某些节点匹配的具有特定值的所有记录。例如，我想要存在LeadDispositionID=Lead和Jurisdiction=NY以及CampaignOfferTypeID=REN和MessageId元素的所有记录（并不重要。）

我尝试了这个但它不起作用（没有错误，但条件不匹配，它返回其他记录）：

SELECT TOP 10 *
  FROM [Messages]
  WHERE PayLoadXml.exist('//LeadDispositionID[.="Lead"] and //CampaignOfferTypeID[.="REN"] and //Jurisdiction[.="NY"] and //MessageId') = 1
  ORDER BY ID DESC

知道我做错了什么？

Answer 1

您无法简单地将.exist()中的节点与and合并。你自己的例子会这样：

SELECT TOP 10 *
FROM @Messages
WHERE PayLoadXml.exist('//VendorLeadItem[LeadDispositionID[.="Lead"] and CampaignOfferTypeID[.="REN"] and Jurisdiction[.="NY"] and MessageId/text()]') = 1

试试这样：

首先将一个声明的表发送到模拟你的Messages表。插入3个案例：

DECLARE @messages TABLE(SomeDescription VARCHAR(100),PayLoadXml XML);
INSERT INTO @messages VALUES
('Your example'
,'<root>
    <Request>
        <RequestData>
            <VendorLeadList>
                <VendorLeadItem>
                    <CampaignOfferTypeID>REN</CampaignOfferTypeID>
                    <LeadDispositionID>Lead</LeadDispositionID>
                    <Jurisdiction>NY</Jurisdiction>
                    <FirstName>Shikasta</FirstName>
                    <LastName>Kashti</LastName>
                    <MessageId>1347_1483825159115_c8273</MessageId>
                </VendorLeadItem>
            </VendorLeadList>
        </RequestData>
        <DualMessageID/>
        <AzureBlobFile/>
        <AzureBlobImageList/>
    </Request>
</root>'
)
,('LeadDispositionID=Slave'
,'<root>
    <Request>
        <RequestData>
            <VendorLeadList>
                <VendorLeadItem>
                    <CampaignOfferTypeID>REN</CampaignOfferTypeID>
                    <LeadDispositionID>Slave</LeadDispositionID>
                    <Jurisdiction>NY</Jurisdiction>
                    <FirstName>Bruno</FirstName>
                    <LastName>Kashti</LastName>
                    <MessageId>1347_1483825159115_c8273</MessageId>
                </VendorLeadItem>
            </VendorLeadList>
        </RequestData>
        <DualMessageID/>
        <AzureBlobFile/>
        <AzureBlobImageList/>
    </Request>
</root>'
)
,('LeadDispositionID=Lead but No MessageId'
,'<root>
    <Request>
        <RequestData>
            <VendorLeadList>
                <VendorLeadItem>
                    <CampaignOfferTypeID>REN</CampaignOfferTypeID>
                    <LeadDispositionID>Lead</LeadDispositionID>
                    <Jurisdiction>NY</Jurisdiction>
                    <FirstName>Bruno</FirstName>
                    <LastName>Kashti</LastName>
                    <MessageId></MessageId>
                </VendorLeadItem>
            </VendorLeadList>
        </RequestData>
        <DualMessageID/>
        <AzureBlobFile/>
        <AzureBlobImageList/>
    </Request>
</root>'
);

这是查询： CROSS APPLY将确保仅考虑具有MessageId的节点。 WHERE将应用其他过滤器

SELECT m.*
FROM @messages AS m
CROSS APPLY m.PayLoadXml.nodes(N'/root/Request/RequestData/VendorLeadList/VendorLeadItem[not(empty(MessageId/text()))]') AS A(itm)
WHERE itm.exist(N'LeadDispositionID[text()="Lead"]')=1

如果您需要检查多个条件，可以使用它：

WHERE itm.exist(N'.[LeadDispositionID="Slave" and FirstName="Bruno"]')=1

SQL Server WHERE子句具有多个节点和条件的XPath

1 个答案: