使用SQL查询整合XML数据

Question

I am fairly new to XML and I have been asked to create a data file in XML format using SQL. I need to query multiple tables in the database to get all the necessary information and need to consolidate the information in the XML output. I am struggling with how to consolidate the data in the expected format. Any and all suggestions/help is greatly appreciated. Thank you! This is the query I am testing with-

(select
    p.acctno as [Demographic/PatientID],
    p.patdob as [Demographic/DOB],
    c.poscode as [Procedure/Facility],
        (select
            CAST(c.acctno as varchar(10)) +
                 CONVERT(varchar(10), c.dateofservice, 112) as [AnesthesiaRecordID],
            (select
                d.provcode as [AnesthesiaStaff/ProvCode]
            FOR XML PATH ('AnesthesiaStaffSet'), TYPE
            )
        FOR XML PATH ('AnethesiaCase'), TYPE
        )
    from patdemo_t p
        inner join charge_t c on p.acctno = c.acctno
        inner join provcode_t d on c.provcode = d.provcode
    where
        p.acctno in (12345, 54321) 
        and c.dateofservice in ('2018-02-15','2018-02-01')
    group by p.acctno, c.poscode, p.patdob, p.patfname,
             p.patlname, c.acctno, c.dateofservice, d.provcode
)
FOR XML PATH ('AnesthesiaRecord'), ROOT('AnesthesiaRecords'), TYPE

My output is like this-

<AnesthesiaRecords>
  <AnesthesiaRecord>
    <Demographic>
      <PatientID>12345</PatientID>
      <DOB>1972-03-30T00:00:00</DOB>
    </Demographic>
    <Procedure>
      <Facility>LHOP </Facility>
    </Procedure>
    <AnethesiaCase>
      <AnesthesiaRecordID>1234520180201</AnesthesiaRecordID>
      <AnesthesiaStaffSet>
        <AnesthesiaStaff>
          <ProvCode>BUS</ProvCode>
        </AnesthesiaStaff>
      </AnesthesiaStaffSet>
    </AnethesiaCase>
  </AnesthesiaRecord>
  <AnesthesiaRecord>
    <Demographic>
      <PatientID>12345</PatientID>
      <DOB>1972-03-30T00:00:00</DOB>
    </Demographic>
    <Procedure>
      <Facility>LHOP </Facility>
    </Procedure>
    <AnethesiaCase>
      <AnesthesiaRecordID>1234520180201</AnesthesiaRecordID>
      <AnesthesiaStaffSet>
        <AnesthesiaStaff>
          <ProvCode>OBR</ProvCode>
        </AnesthesiaStaff>
      </AnesthesiaStaffSet>
    </AnethesiaCase>
  </AnesthesiaRecord>
  <AnesthesiaRecord>
    <Demographic>
      <PatientID>54321</PatientID>
      <DOB>2006-04-01T00:00:00</DOB>
    </Demographic>
    <Procedure>
      <Facility>LHOP </Facility>
    </Procedure>
    <AnethesiaCase>
      <AnesthesiaRecordID>5432120180215</AnesthesiaRecordID>
      <AnesthesiaStaffSet>
        <AnesthesiaStaff>
          <ProvCode>LUN</ProvCode>
        </AnesthesiaStaff>
      </AnesthesiaStaffSet>
    </AnethesiaCase>
  </AnesthesiaRecord>
  <AnesthesiaRecord>
    <Demographic>
      <PatientID>54321</PatientID>
      <DOB>2006-04-01T00:00:00</DOB>
    </Demographic>
    <Procedure>
      <Facility>LHOP </Facility>
    </Procedure>
    <AnethesiaCase>
      <AnesthesiaRecordID>5432120180215</AnesthesiaRecordID>
      <AnesthesiaStaffSet>
        <AnesthesiaStaff>
          <ProvCode>REA</ProvCode>
        </AnesthesiaStaff>
      </AnesthesiaStaffSet>
    </AnethesiaCase>
  </AnesthesiaRecord>
</AnesthesiaRecords>

The output needs to be consolidated like this-

<AnesthesiaRecords>
      <AnesthesiaRecord>
        <Demographic>
          <PatientID>12345</PatientID>
          <DOB>1972-03-30T00:00:00</DOB>
        </Demographic>
        <Procedure>
          <Facility>LHOP </Facility>
        </Procedure>
        <AnethesiaCase>
          <AnesthesiaRecordID>1234520180201</AnesthesiaRecordID>
          <AnesthesiaStaffSet>
            <AnesthesiaStaff>
              <ProvCode>BUS</ProvCode>
            </AnesthesiaStaff>
            <AnesthesiaStaff>
              <ProvCode>OBR</ProvCode>
            </AnesthesiaStaff>
          </AnesthesiaStaffSet>
        </AnethesiaCase>
      </AnesthesiaRecord>
     <AnesthesiaRecord>
        <Demographic>
          <PatientID>54321</PatientID>
          <DOB>2006-04-01T00:00:00</DOB>
        </Demographic>
        <Procedure>
          <Facility>LHOP </Facility>
        </Procedure>
        <AnethesiaCase>
          <AnesthesiaRecordID>5432120180215</AnesthesiaRecordID>
          <AnesthesiaStaffSet>
          <AnesthesiaStaff>
              <ProvCode>LUN</ProvCode>
            </AnesthesiaStaff>
            <AnesthesiaStaff>
              <ProvCode>REA</ProvCode>
            </AnesthesiaStaff>
          </AnesthesiaStaffSet>
      </AnethesiaCase>
      </AnesthesiaRecord>
    </AnesthesiaRecords>

Answer 1

Next time you ask a question please add some sample data, best with DDL and DML ( read about MCVE ). And try to reduce youe part to the relevant pieces. If there might be more than one: 2 is enough. If there are several of the same : 1 is enough.

Your XML seems to be quite straight. Just one single row, some elements deeper nested, but still 1:1 . The only 1:n element seems to be the <AnesthesiaStaff> . Your own query is pretty close actually.

What I changed:

• took away the INNER JOIN provcode_t and placed this within the sub-select ( correlated sub-query ).
• Changed 2018-02-05 to 20180205 as the ISO8601 format is not culture independant with DATETIME (don't now your target data type though)
• Placed the AnesthesiaStaffSet as ROOT for the sub-select and used [*] as the column name for the created inner XML

Try it out (I cannot test it)

select
p.acctno as [Demographic/PatientID],
p.patdob as [Demographic/DOB],
c.poscode as [Procedure/Facility],
    (select
        CAST(c.acctno as varchar(10)) +
             CONVERT(varchar(10), c.dateofservice, 112) as [AnesthesiaRecordID],
        (select
            d.provcode as [AnesthesiaStaff]
         from provcode_t d 
         where c.provcode = d.provcode
         FOR XML PATH ('AnesthesiaStaff'),ROOT('AnesthesiaStaffSet'), TYPE
        )
    FOR XML PATH ('AnethesiaCase'), TYPE
    ) AS [*]
from patdemo_t p
    inner join charge_t c on p.acctno = c.acctno
where
    p.acctno in (12345, 54321) 
    and c.dateofservice in ('20180215','20180201')
group by p.acctno, c.poscode, p.patdob, p.patfname,
         p.patlname, c.acctno, c.dateofservice
FOR XML PATH ('AnesthesiaRecord'), ROOT('AnesthesiaRecords'), TYPE

If this does not solve your issue, please use the edit option to add an MCVE to your question.