Comment lire un attribut du XML

Question

DECLARE @XmlData xml 
SET @XmlData= '<?xml version="1.0" encoding="utf-8" ?> 
<ROOT PROCESS_DATE="25-Nov-2009" ROW_COUNT="2" VERIFY_TOTAL="654454.54"> 
    <row rowNumber="1"> 
     <Code1>11111</Code1> 
     <Code2>AAAA </Code2> 
    </row> 
    <row rowNumber="2"> 
     <Code1>2222</Code1> 
     <Code2>BBBB </Code2> 
    </row> 
</ROOT>' 

-- Following query returns the Code1, & Code2 for each row. 
SELECT 
       R.i.query('Code1').value('.', 'nvarchar(8)') AS Code1, 
       R.i.query('Code2').value('.', 'nvarchar(8)') AS Code2 
FROM @XmlData.nodes('/ROOT/row') R(i) 

-- Now I want to get the rowNumber attribute of each row in the resultset. 
SELECT 
       R.i.query('@rowNumber') AS rowNumber, 
       R.i.query('Code1').value('.', 'nvarchar(8)') AS Code1, 
       R.i.query('Code2').value('.', 'nvarchar(8)') AS Code2 
FROM @XmlData.nodes('/ROOT/row') R(i) 

-- Above query returns error 

Answer 1

Je n'ai pas SQL Server à portée de main, mais mon instinct me dit d'essayer:

R.i.query('.').value('@rowNumber', 'int') AS rowNumber 

Answer 2

Vous pouvez interroger l'attribut avec la solution de contournement data():

R.i.query('data(row/@Name)').value('.','int') AS rowNumber 

Answer 3

DECLARE @x XML ; 
SET @x = '<?xml version="1.0" encoding="utf-8" ?> 
<ROOT PROCESS_DATE="25-Nov-2009" ROW_COUNT="2" VERIFY_TOTAL="654454.54"> 
    <row rowNumber="1"> 
     <Code1>11111</Code1> 
     <Code2>AAAA </Code2> 
    </row> 
    <row rowNumber="2"> 
     <Code1>2222</Code1> 
     <Code2>BBBB </Code2> 
    </row> 
</ROOT>' ; 

SELECT v.value('.', 'VARCHAR(20)') AS Name 
FROM @x.nodes('(/ROOT/row/@*)') x (v)