What is the most efficient way to modify XML values? To allow for precise modification of XML nodes and values, the XQuery XML query language employs an extension.![]() There are different ways to achieve this task of importing data from an XML file into a SQL Server table, but I am going to demonstrate one of easiest ways to. The SQL UPDATE Statement. The UPDATE statement is used to modify the existing records in a table. UPDATE Syntax. How to query for Xml values and attributes from table in SQL Server? I have a table that contains a Xml column: SELECT *. A sample of the xml data of a row would be: < Sqm version="1. Metrics>. < Metric id="Transaction. Cleanup. Thread. Record. Used. Transaction. Shift" type="timer" unit="µs" count="1" sum="2. Value="7. 37. 01" max. Value="7. 37. 01" > 7. Metric>. < Metric id="Transaction. Cleanup. Thread. Refund. Old. Trans" type="timer" unit="µs" count="1" sum="1. Value="6. 32. 70. Value="6. 32. 70. Metric>. < Metric id="Database. Create. Connection_Save. Context. User. GUID" type="timer" unit="µs" count="2" sum="7. Value="1. 29. 28" max. Value="1. 30. 06" standard. Deviation="1. 6" > 1. Metric>. < Metric id="Global. Current. User" type="timer" unit="µs" count="6" sum="4. Value="1. 5" max. Value="1. 37. 94. Deviation="1. 64. Metric>. < Metric id="Global. Current. User_Fetch. Identity. From. Database" type="timer" unit="µs" count="1" sum="4. Value="1. 37. 52. Value="1. 37. 52. Metric>. < /Metrics>. In the case of this data, I would want: Sqm. Id id type unit count sum min. Value max. Value standard. Deviation Value. ===== =================================================== ===== ==== ===== ====== ======== ======== ================= ======. Transaction. Cleanup. Thread. Record. Used. Transaction. Shift timer µs 1 2. NULL 7. 37. Transaction. Cleanup. Thread. Refund. Old. Trans timer µs 1 1. NULL 6. 32. Database. Create. Connection_Save. Context. User. GUID timer µs 2 7. Global. Current. User timer µs 6 4. Global. Current. User_Fetch. Identity. From. Database timer µs 1 4. NULL 1. 37. In the end I'll actually be performing SUM(), MIN(), MAX() aggregation. But for now I'm just trying to query an xml column. In pseudo- code, I would try something like: SELECT. Data. query('/Sqm/Metrics/Metric/@id') AS id. Data. query('/Sqm/Metrics/Metric/@type') AS type. Data. query('/Sqm/Metrics/Metric/@unit') AS unit. Data. query('/Sqm/Metrics/Metric/@sum') AS sum. Data. query('/Sqm/Metrics/Metric/@count') AS count. Data. query('/Sqm/Metrics/Metric/@min. Value') AS min. Value. Data. query('/Sqm/Metrics/Metric/@max. Value') AS max. Value. Data. query('/Sqm/Metrics/Metric/@standard. Deviation') AS standard. Deviation. Data. query('/Sqm/Metrics/Metric') AS value.But that SQL query doesn't work: Msg 2.Level 1. 6, State 1, Line 2.XQuery [Sqm. data.Attribute may not appear outside of an element. Nfs Hp2 Nfs Hp2 Patch there. I've hunted, and it's amazing how poorly documented, or exampled, Xml querying is. Most resources rather than querying a table, query a variable; which I'm not doing. Most resources only use xml querying for filtering and selection, rather than reading values. Most resources read hard- coded child nodes (by index), rather than actual values. I tried randomly using . SELECT. Data. value('/Sqm/Metrics/Metric/@id', 'varchar(max)') AS id. Data. value('/Sqm/Metrics/Metric/@type', 'varchar(max)') AS type. Data. value('/Sqm/Metrics/Metric/@unit', 'varchar(max)') AS unit. Data. value('/Sqm/Metrics/Metric/@sum', 'varchar(max)') AS sum. Data. value('/Sqm/Metrics/Metric/@count', 'varchar(max)') AS count. Data. value('/Sqm/Metrics/Metric/@min. Value', 'varchar(max)') AS min. . Value. Data. value('/Sqm/Metrics/Metric/@max. Value', 'varchar(max)') AS max. Value. Data. value('/Sqm/Metrics/Metric/@standard. Deviation', 'varchar(max)') AS standard. Deviation. Data. value('/Sqm/Metrics/Metric', 'varchar(max)') AS value. But that also doesn't work: Msg 2. Level 1. 6, State 1, Line 3 XQuery [Sqm.
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