Find the value from XML data in SQL Server? - sql

Question

I want to find the value from XML data in SQL Server table.
Below is my sample xmldata;
<wddxPacket version="1.0">
<header />
<data>
<struct type="xyz">
<var name="TXRGHC43">
<string />
</var>
<var name="TWBS1">
<string>9011750</string>
</var>
<var name="PMNAMEID">
<string>2323443</string>
</var>
<var name="EDATE36">
<string />
</var>
<var name="TWBSDESC40">
<string />
</var>
</struct>
</data>
</wddxPacket>
I am searching for 9011750 under TWBS1. can you please help me on this. how to find 9011750 value.
I am trying the following queries but I didn't get any output.
select
col
from
xyz
where
col.value('(/wddxPacket/data/struct/var[TWBS1])[2]', 'varchar(max)') like '9011750'
SELECT col.value('(/wddxPacket/data/struct/var/string)[3]', 'varchar(100)')
FROM xyz
my requirement is to search the data entire table, that is only sample xml data.

Answer 1

Please try the following SQL. It shows how to use a predicate in the XPath expression to simulate WHERE clause.
SQL
-- DDL and sample data population, start
DECLARE #tbl TABLE (ID INT IDENTITY PRIMARY KEY, xmldata XML);
INSERT INTO #tbl (xmldata)
VALUES
(N'<wddxPacket version="1.0">
<header/>
<data>
<struct type="xyz">
<var name="TXRGHC43">
<string/>
</var>
<var name="TWBS1">
<string>9011750</string>
</var>
<var name="PMNAMEID">
<string>2323443</string>
</var>
<var name="EDATE36">
<string/>
</var>
<var name="TWBSDESC40">
<string/>
</var>
</struct>
</data>
</wddxPacket>');
-- DDL and sample data population, end
DECLARE #varName VARCHAR(20) = 'TWBS1';
SELECT c.value('(./text())[1]','INT') AS [string_value]
FROM #tbl AS tbl
CROSS APPLY tbl.xmldata.nodes('/wddxPacket/data/struct/var[#name=sql:variable("#varName")]/string') AS t(c);
Output
+--------------+
| string_value |
+--------------+
| 9011750 |
+--------------+