TSQL Inserting records from XML string - sql-server

Question

I have a SQL query that is inserting records into a table from an XML string that I pass to it. The string could contain 1 node or multiple so each one is a new record.
Here is my XML string:
<root>
<data>
<segment>
<trainingEventID>9</trainingEventID>
<localeID>641</localeID>
<numOfTeammates>12</numOfTeammates>
<nonProdHrs>21</nonProdHrs>
<segmentDate>10/10/2014</segmentDate>
<trainers>
<trainer>
<empID>HUS123</empID>
</trainer>
<trainer>
<empID>Dan123</empID>
</trainer>
</trainers>
</segment>
</data>
<data>
<segment>
<trainingEventID>9</trainingEventID>
<localeID>641</localeID>
<numOfTeammates>12</numOfTeammates>
<nonProdHrs>21</nonProdHrs>
<segmentDate>10/25/2014</segmentDate>
<trainers>
<trainer>
<empID>HUS123</empID>
</trainer>
<trainer>
<empID>Dan123</empID>
</trainer>
</trainers>
</segment>
</data>
</root>
Every segment is a new record that is added into the table.
Now, I have a separate table called trainers. For each trainer, I need to also insert a record into that table but it needs to have the last inserted record id of the segment.
Here is my query:
INSERT INTO myTable(trainingEventID, localeID, segmentDate, numofTeammates, nonProdHrs)
SELECT ParamValues.x1.value('trainingEventID[1]', 'INT'),
ParamValues.x1.value('localeID[1]', 'INT'),
ParamValues.x1.value('segmentDate[1]', 'DATE'),
ParamValues.x1.value('numOfTeammates[1]', 'INT'),
ParamValues.x1.value('nonProdHrs[1]', 'FLOAT')
FROM #xml.nodes('/root/data/segment') AS ParamValues(x1);
How can I go about inserting the trainers into another table with the record ID that was created from the segment insert?

Answer 1

Given the clarification of this statement in the question:
For each trainer, I need to also insert a record into that table but it needs to have the last inserted record id of the segment.
being (as found in the comments on the question):
There would be a total of 4 records inserted into the trainer table, 2 have the segment id of 1 and the other 2 with the segment id of 2.
The following will insert this data into related tables that have auto-incrementing IDs. In the sample data, I varied the EmpID values slightly to make it clearer that it is indeed working as expected.
DECLARE #DocumentID INT, #ImportData XML;
SET #ImportData = N'
<root>
<data>
<segment>
<trainingEventID>9</trainingEventID>
<localeID>641</localeID>
<numOfTeammates>12</numOfTeammates>
<nonProdHrs>21</nonProdHrs>
<segmentDate>10/10/2014</segmentDate>
<trainers>
<trainer>
<empID>HUS123</empID>
</trainer>
<trainer>
<empID>Dan123</empID>
</trainer>
</trainers>
</segment>
</data>
<data>
<segment>
<trainingEventID>9</trainingEventID>
<localeID>641</localeID>
<numOfTeammates>12</numOfTeammates>
<nonProdHrs>21</nonProdHrs>
<segmentDate>10/25/2014</segmentDate>
<trainers>
<trainer>
<empID>HUS1234</empID>
</trainer>
<trainer>
<empID>Dan1234</empID>
</trainer>
</trainers>
</segment>
</data>
</root>';
DECLARE #Segment TABLE (SegmentId INT NOT NULL IDENTITY(1, 1) PRIMARY KEY,
TrainingEventID INT NOT NULL, -- Unique
LocaleID INT NOT NULL, -- Unique
NumOfTeammates INT,
NonProdHrs INT,
SegmentDate DATE); -- Unique
-- Ideally create UNIQUE INDEX with the 3 fields noted above
DECLARE #Trainer TABLE (TrainerId INT NOT NULL IDENTITY(1, 1) PRIMARY KEY,
SegmentID INT NOT NULL, -- FK to Segment.SegmentID
EmpID VARCHAR(50) NOT NULL);
EXEC sp_xml_preparedocument #DocumentID OUTPUT, #ImportData;
-- First pass: extract "Segment" rows
INSERT INTO #Segment
(TrainingEventID, LocaleID, NumOfTeammates, NonProdHrs, SegmentDate)
SELECT TrainingEventID, LocaleID, NumOfTeammates, NonProdHrs, SegmentDate
FROM OPENXML (#DocumentID, N'/root/data/segment', 2)
WITH (TrainingEventID INT './trainingEventID/text()',
LocaleID INT './localeID/text()',
NumOfTeammates INT './numOfTeammates/text()',
NonProdHrs INT './nonProdHrs/text()',
SegmentDate DATE './segmentDate/text()');
-- Second pass: extract "Trainer" rows
INSERT INTO #Trainer (SegmentID, EmpID)
SELECT seg.SegmentID, trnr.EmpID
FROM OPENXML (#DocumentID, N'/root/data/segment/trainers/trainer', 2)
WITH (TrainingEventID INT '../../trainingEventID/text()',
LocaleID INT '../../localeID/text()',
SegmentDate DATE '../../segmentDate/text()',
EmpID VARCHAR(50) './empID/text()') trnr
INNER JOIN #Segment seg
ON seg.[TrainingEventID] = trnr.[TrainingEventID]
AND seg.[LocaleID] = trnr.[LocaleID]
AND seg.[SegmentDate] = trnr.[SegmentDate];
EXEC sp_xml_removedocument #DocumentID;
-------------------
SELECT * FROM #Segment ORDER BY [SegmentID];
SELECT * FROM #Trainer ORDER BY [SegmentID];
Output:
SegmentId TrainingEventID LocaleID NumOfTeammates NonProdHrs SegmentDate
1 9 641 12 21 2014-10-10
2 9 641 12 21 2014-10-25
TrainerId SegmentID EmpID
1 1 HUS123
2 1 Dan123
3 2 HUS1234
4 2 Dan1234
References:
OPENXML
sp_xml_preparedocument
sp_xml_removedocument