如何在 SQL 语句中获取 XML 值？
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【中文标题】如何在 SQL 语句中获取 XML 值？【英文标题】：How to get XML values in SQL statement? 【发布时间】：2020-05-11 09:57:56 【问题描述】：下面是 XML 标记，我需要从中获取值并将其形成为 SQL 输出，我遇到了一些问题，
<xml>
<Channel>
<Program id="1" category="A">
<name>PraMatino</name>
<Bin>
<Date>1/1/2020</Date>
<Date>1/1/2020</Date>
</Bin>
<Player>
<Pla>Rajesh</Pla>
<Pla>Suman</Pla>
</Player>
<Television>
<HostDeails>2/9/2020</HostDeails>
<HostDeails>MALE</HostDeails>
<HostDeails>Colour</HostDeails>
</Television>
<addresses>
<address>
<address1>No 10</address1>
<city>Chennai</city>
<country>IN</country>
<ProductName>Lavender</ProductName>
</address>
<address>
<address1>N0 72</address1>
<city>Sanagoor Road</city>
<postalCode>641006</postalCode>
</address>
<address>
<address1>Old No 10/ New No 3</address1>
<city>Madurai</city>
<country>IN</country>
<ProductName>Lavender</ProductName>
</address>
<address>
<address1>N0 98</address1>
<city>BridhSanagoor Road</city>
<country>SriLanka</country>
<postalCode>641006</postalCode>
</address>
</addresses>
</Program>
<Program id="25" category="B">
<name>Rahman</name>
<Bin>
<Date>10/1/2020</Date>
<Date>1/12/1989</Date>
</Bin>
<Player>
<Pla>Paul</Pla>
<Pla>Right</Pla>
</Player>
<Television>
<HostDeails>5/7/2021</HostDeails>
<HostDeails>MALE</HostDeails>
<HostDeails>Colour</HostDeails>
</Television>
<addresses>
<address>
<address1>S7</address1>
<city>Coimbatire</city>
<country>IN</country>
<ProductName>Lavender</ProductName>
</address>
<address>
<address1>Sai Akshya Appartment</address1>
<city>Sanagoor Road</city>
<postalCode>631009</postalCode>
</address>
<address>
<address1> No 3</address1>
<city>Thenkaasi</city>
<ProductName>Lavender</ProductName>
</address>
<address>
<address1>N0 98</address1>
<city>BridhSanagoor Road</city>
<country>SriLanka</country>
<postalCode>641006</postalCode>
</address>
</addresses>
</Program>
</Channel>
</xml>
如何将上面的 XML 查询到下面的 SQL 选择语句中？
我可以实现“ADDRESS1”和“CITY”，但如果我尝试在“ADDRESSES”中包含“ID”和“CATEGORY”标签，它不会按预期工作。欢迎分享你的想法
谢谢
【问题讨论】：
您需要指定您的数据库供应商。 【参考方案1】：您没有指定数据库供应商。请尝试以下 SQL。它适用于 MS SQL Server。它通过CROSS APPLY 子句和不同的别名模拟XML 内部的一对多关系。
SQL
DECLARE @xml XML =
N'<xml>
<Channel>
<Program id="1" category="A">
<name>PraMatino</name>
<Bin>
<Date>1/1/2020</Date>
<Date>1/1/2020</Date>
</Bin>
<Player>
<Pla>Rajesh</Pla>
<Pla>Suman</Pla>
</Player>
<Television>
<HostDeails>2/9/2020</HostDeails>
<HostDeails>MALE</HostDeails>
<HostDeails>Colour</HostDeails>
</Television>
<addresses>
<address>
<address1>No 10</address1>
<city>Chennai</city>
<country>IN</country>
<ProductName>Lavender</ProductName>
</address>
<address>
<address1>N0 72</address1>
<city>Sanagoor Road</city>
<postalCode>641006</postalCode>
</address>
<address>
<address1>Old No 10/ New No 3</address1>
<city>Madurai</city>
<country>IN</country>
<ProductName>Lavender</ProductName>
</address>
<address>
<address1>N0 98</address1>
<city>BridhSanagoor Road</city>
<country>SriLanka</country>
<postalCode>641006</postalCode>
</address>
</addresses>
</Program>
<Program id="25" category="B">
<name>Rahman</name>
<Bin>
<Date>10/1/2020</Date>
<Date>1/12/1989</Date>
</Bin>
<Player>
<Pla>Paul</Pla>
<Pla>Right</Pla>
</Player>
<Television>
<HostDeails>5/7/2021</HostDeails>
<HostDeails>MALE</HostDeails>
<HostDeails>Colour</HostDeails>
</Television>
<addresses>
<address>
<address1>S7</address1>
<city>Coimbatire</city>
<country>IN</country>
<ProductName>Lavender</ProductName>
</address>
<address>
<address1>Sai Akshya Appartment</address1>
<city>Sanagoor Road</city>
<postalCode>631009</postalCode>
</address>
<address>
<address1>No 3</address1>
<city>Thenkaasi</city>
<ProductName>Lavender</ProductName>
</address>
<address>
<address1>N0 98</address1>
<city>BridhSanagoor Road</city>
<country>SriLanka</country>
<postalCode>641006</postalCode>
</address>
</addresses>
</Program>
</Channel>
</xml>';
SELECT prog.c.value('@id','INT') AS id
, prog.c.value('@category','CHAR(1)') AS category
, addr.c.value('(address1/text())[1]','VARCHAR(100)') AS address1
, addr.c.value('(city/text())[1]','VARCHAR(100)') AS city
FROM @xml.nodes('/xml/Channel/Program') AS prog(c)
CROSS APPLY prog.c.nodes('addresses/address') AS addr(c);
输出
+----+----------+-----------------------+--------------------+
| id | category | address1 | city |
+----+----------+-----------------------+--------------------+
| 1 | A | No 10 | Chennai |
| 1 | A | N0 72 | Sanagoor Road |
| 1 | A | Old No 10/ New No 3 | Madurai |
| 1 | A | N0 98 | BridhSanagoor Road |
| 25 | B | S7 | Coimbatire |
| 25 | B | Sai Akshya Appartment | Sanagoor Road |
| 25 | B | No 3 | Thenkaasi |
| 25 | B | N0 98 | BridhSanagoor Road |
+----+----------+-----------------------+--------------------+
【讨论】：
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