如何使用SQL Server从表的XML列中提取值 [英] How to extract values from xml column in a table using SQL Server

问题描述

我正在尝试从SQL Server表的XML列中提取值。我有此表InsuranceEntity，其中列InsuranceEntity_ID和EntityXML。

EntityXML列的值如下：

<insurance insurancepartnerid="CIGNA" sequencenumber="1" 
           subscriberidnumber="1234567" groupname="Orthonet-CIGNA" 
           groupnumber="7654321" copaydollaramount="1" />

如何从此EntityXML列提取subscriberidnumber和groupnumber？

推荐答案

XQuery方法.nodes()和.value()。

您可能需要调整数据类型。我全面使用了泛型VARCHAR(20)。

SQL

--DDL and sample data population, start
DECLARE @tbl TABLE (InsuranceEntity_ID INT IDENTITY PRIMARY KEY, EntityXML XML);
INSERT INTO @tbl (EntityXML) VALUES
(N'<insurance insurancepartnerid="CIGNA" sequencenumber="1"
           subscriberidnumber="1234567" groupname="Orthonet-CIGNA"
           groupnumber="7654321" copaydollaramount="1"/>');
--DDL and sample data population, end

SELECT InsuranceEntity_ID
    , c.value('@subscriberidnumber', 'VARCHAR(20)') AS subscriberidnumber
    , c.value('@groupnumber', 'VARCHAR(20)') AS groupnumber 
FROM @tbl
    CROSS APPLY EntityXML.nodes('/insurance') AS t(c);

输出

+--------------------+--------------------+-------------+
| InsuranceEntity_ID | subscriberidnumber | groupnumber |
+--------------------+--------------------+-------------+
|                  1 |            1234567 |     7654321 |
+--------------------+--------------------+-------------+

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