SQL query to upload XML file into a single SQL table - sql

Question

I have a sample xml file that I need to upload into a SQL table.
Below the xml file is the SQL query to select the XML values to insert into the table
Problem: I am unable to obtain the <Actual>,<ExpectedValue> values as they occur more than once
Would appreciate if someone could kindly help correct/direct me to get the right values
Thanks.
<?xml version="1.0" encoding="utf-8" ?>
<Results>
<General>
<Version>1.01</Version>
<InputFilename>TestFile.xml</InputFilename>
<Filename>xyz.XML</Filename>
</General>
<Tests>
<Test Name="Test 1">
<Number>0</Number>
<MinimumSampleCount>1</MinimumSampleCount>
<ExpectedValues>
<ExpectedValue>8</ExpectedValue>
<ExpectedValue>5</ExpectedValue>
</ExpectedValues>
<Actual>
<seq>1</seq>
<ValueFound>8</ValueFound>
<seqTestResult>Passed</seqTestResult>
</Actual>
<Actual>
<seq>3</seq>
<ValueFound>8</ValueFound>
<seqTestResult>Passed</seqTestResult>
</Actual>
<Result>Last sequence matches test cases.</Result>
<TestResult>Passed</TestResult>
</Test>
<Test Name="Test 3">
<Number>25</Number>
<ExpectedValues><ExpectedValue>3.50</ExpectedValue>
<ExpectedValue>3.56</ExpectedValue>
<ExpectedValue>3.60</ExpectedValue>
</ExpectedValues>
<Result>not applicable</Result>
<TestResult>Skipped</TestResult>
</Test>
<OverallTestResult>Passed</OverallTestResult>
</Tests>
</Results>
SQL Code:
INSERT INTO dbo.Results_XML ([Version],[InputFilename],[Filename],
[OverallTestResult],Name,Number,MinimumSampleCount,ActualNumberOfSamples,ExpectedValue,
ActualSeq, ActualValueFound,ActualseqTestResult,CompareValue,Result,TestResult
SELECT [Version] = x.data.value('Version[1]','numeric(3,2)'),
[InputFilename] = x.data.value('InputFilename[1]','varchar(80)'),
[Filename] = x.data.value('Filename[1]','varchar(80)'),
[OverallTestResult]=T2.N.value('OverallTestResult[1]','varchar(15)'),
[Test Name]= y.data.value('#Name','varchar(255)')
,[Number]= y.data.value('Number[1]','int'),
[MinimumSampleCount]=y.data.value('Number[1]','int'),
[ActualNumberOfSamples]=y.data.value('ActualNumberOfSamples[1]','int')
,[ExpectedValue]=z.data.value('ExpectedValue[1]','varchar(255)')
,[ActualSeq]=v.data.value('Seq[1]','int'),
,ActualValueFound=v.data.value('ValueFound[1]','int'),
,ActualseqTestResult=v.data.value('seqTestResult[1]','varchar(255)'),
,[CompareValue]=y.data.value('CompareValue[1]','bigint')
,[Result]=y.data.value('Result[1]','varchar(40)'),
[TestResult]=y.data.value('TestResult[1]','varchar(10)')
FROM CD t
CROSS APPLY t.XMLData.nodes('/Results/General') x(data)
cross apply t.XMLData.nodes('/Results/Tests') as T2(N)
CROSS APPLY t.XMLData.nodes('/Results/Tests/Test') as y(data)
CROSS APPLY t.XMLData.nodes('Test/ExpectedValues/Expected') z(data)
CROSS APPLY t.XMLData.nodes('Test/ExpectedValues/Actual/') v(data)

Answer 1

I'm assuming (based on your previous question) that this is for SQL Server - correct?
(you should always explicitly and clearly specify what database system you're using - get used to it!)
You need to use something like this:
get a XML node for the <Results>/<General> node to get some basic data
then get a list of all <Test> nodes - get some data from there
based on each <Test> node - get a list of it's <ExpectedValues>/<ExpectedValue> nodes as well as the <Actual> nodes inside the <Test> and pick out the data that you need
In my experience, it's a good idea to use descriptive names - use GeneralData, ExpectedData etc. instead of just x, y and z - that makes it a lot easier to understand what you're dealing with!
Here's the T-SQL / XQuery statement that I used:
SELECT
-- General values
[Version] = GeneralData.value('Version[1]','numeric(3,2)'),
[InputFilename] = GeneralData.value('InputFilename[1]','varchar(80)'),
[Filename] = GeneralData.value('Filename[1]','varchar(80)'),
-- Test-specific values
[Test Name]= TestData.value('#Name','varchar(255)'),
[Test Number]= TestData.value('Number[1]','int'),
-- Test-specific expected values
[ExpectedValue] = ExpectedData.value('.', 'varchar(255)'),
-- Test-specific actual values
[ActualSeq] = ActualData.value('(seq)[1]', 'int'),
ActualValueFound = ActualData.value('(ValueFound)[1]', 'int'),
ActualseqTestResult = ActualData.value('(seqTestResult)[1]', 'varchar(255)')
FROM
CD t
CROSS APPLY
-- fetch the <Results> / <General> node
XMLdata.nodes('/Results/General') AS XGD(GeneralData)
CROSS APPLY
-- fetch a list of <Results> / <Tests> / <Test> nodes
XMLDATA.nodes('/Results/Tests/Test') AS XTD(TestData)
CROSS APPLY
-- for each <Test> node - fetch its contained <ExpectedValues>/<ExpectedValue> nodes
TestData.nodes('ExpectedValues/ExpectedValue') AS XED(ExpectedData)
CROSS APPLY
-- for each <Test> node - fetch its contained <Actual> nodes
TestData.nodes('Actual') AS XAD(ActualData)