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T-SQL / SQL Server Features

XML nodes

Learn XML nodes in T-SQL through a focused explanation, a dedicated construct-specific example, an engineering boundary, and a mastery check.

10 min read • Advanced

XML nodes is an atomic T-SQL topic inside SQL Server Features. This lesson focuses on how the XML nodes construct is written, what it changes, and when it is the right tool.

Trace the example line by line. Identify the exact syntax for XML nodes, the input state before it runs, and the resulting value, control flow, database state, hardware behavior, or runtime effect afterward. Neighboring lessons use different constructs rather than renamed copies of this one.

Topic-specific example

tsql-08-08-xml-nodes.sql
tsql Try It Live 
DECLARE @x xml='<items><i id="1"/><i id="2"/></items>'; SELECT n.value('@id','int') FROM @x.nodes('/items/i') t(n);
Edge case / engineering note

For XML nodes, test the boundary that belongs to this exact feature rather than a generic failure case. Check invalid or empty input, NULL/unknown state, numeric limits, transaction or exception behavior, synthesis/runtime constraints, ownership/permission rules, or backtracking/control-flow effects where they apply.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

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