在SQL Server上读取XML:选择自定义属性

Question

我正在尝试读取一个XML，除了名为的属性外，它总体上运行得很好

<custom-attribute attribute-id="loyaltyNumber">1234567890</custom-attribute>

这是我试图得到的值"；1234567890"；

这是测试代码：

DECLARE @XML XML = '<customers>
<customer customer-no="00000001">
<credentials>
<login>[e-mail]</login>
</credentials>
<profile>
<preferred-locale>fr_BE</preferred-locale>
<custom-attributes>
<custom-attribute attribute-id="ServiceId">1</custom-attribute>
<custom-attribute attribute-id="loyaltyNumber">1234567890</custom-attribute>
</custom-attributes>
</profile>
<note/>
</customer>
<customer customer-no="00000002">
<credentials>
<login>[e-mail]</login>
</credentials>
<profile>
<preferred-locale>fr_FR</preferred-locale>
<custom-attributes>
<custom-attribute attribute-id="loyaltyNumber">1234567890</custom-attribute>
</custom-attributes>
</profile>
<note/>
</customer>
</customers>'

SELECT
CustomerNo = Events.value('@customer-no', 'int'),
--EventType = Events.value('@Type', 'varchar(20)'),
CustomerLogin =Events.value('(credentials/login)[1]', 'varchar(60)'),
CustomerLocal =Events.value('(profile/preferred-locale)[1]', 'varchar(60)'),
EventKind =Events.value('(profile/custom-attributes/custom-attribute)[2]', 'varchar(60)')
FROM
@XML.nodes('/customers/customer') AS XTbl(Events)

目前的结果是：

客户本地><123467890>空//tr>

客户编号	客户登录	EventKind
1	[e-mail]	fr_BE
2	[e-mail]	fr_fr

。。过滤具有属性id="忠诚号码"的属性的路径

EventKind =Events.value('(profile/custom-attributes/custom-attribute[@attribute-id="loyaltyNumber"])[1]', 'varchar(60)')

您只需将自定义属性的属性id添加到查询中即可：

DECLARE @XML XML = '<customers>
<customer customer-no="00000001">
<credentials>
<login>[e-mail]</login>
</credentials>
<profile>
<preferred-locale>fr_BE</preferred-locale>
<custom-attributes>
<custom-attribute attribute-id="ServiceId">1</custom-attribute>
<custom-attribute attribute-id="loyaltyNumber">1234567890</custom-attribute>
</custom-attributes>
</profile>
<note/>
</customer>
<customer customer-no="00000002">
<credentials>
<login>[e-mail]</login>
</credentials>
<profile>
<preferred-locale>fr_FR</preferred-locale>
<custom-attributes>
<custom-attribute attribute-id="loyaltyNumber">1234567777</custom-attribute>
</custom-attributes>
</profile>
<note/>
</customer>
</customers>'

SELECT
CustomerNo = Events.value('@customer-no', 'int'),
--EventType = Events.value('@Type', 'varchar(20)'),
CustomerLogin =Events.value('(credentials/login)[1]', 'varchar(60)'),
CustomerLocal =Events.value('(profile/preferred-locale)[1]', 'varchar(60)'),
EventKind =Events.value('(profile/custom-attributes/custom-attribute[@attribute-id = "loyaltyNumber"])[1]', 'varchar(60)')
FROM
@XML.nodes('/customers/customer') AS XTbl(Events)