Sum of values extracted using SQL - sql

Question

I have an xml like the below.
<LPNDetail>
<ItemName>5054807025389</ItemName>
<DistroNbr/>
<DistributionNbr>TR001000002514</DistributionNbr>
<OrderLine>2</OrderLine>
<RefField2/>
<RefField3>OU01180705</RefField3>
<RefField4>0002</RefField4>
<RefField5>Retail</RefField5>
<Qty>4</Qty>
<QtyUom>Unit</QtyUom>
</LPNDetail>
<LPNDetail>
<ItemName>5054807025563</ItemName>
<DistroNbr/>
<DistributionNbr>TR001000002514</DistributionNbr>
<OrderLine>4</OrderLine>
<RefField2/>
<RefField3>OU01180705</RefField3>
<RefField4>0004</RefField4>
<RefField5>Retail</RefField5>
<Qty>2</Qty>
<QtyUom>Unit</QtyUom>
</LPNDetail>
I have extracted the xml field using extract.xmltype and now i am getting the below result.
42
But i need to sum the quantity values i.e i need to get result as 6 (4+2).
Any help will be appreciated.
Thanks,
Shihaj

Answer 1

It is not clear what you mean by "an xml". If it's supposed to be an XML document, you are missing the outermost tags, perhaps something like <Document> ..... </Document>
If your text value is EXACTLY as you have shown it (which would be pretty bad), you can wrap within such outermost tags manually, and then use standard Oracle XML tools. For the illustration below I assume you simply have a string (VARCHAR2 or CLOB), not converted to XML type; in that case, I concatenate the beginning and end tags, and then convert to XMLtype, in the query.
with t ( str ) as (
select '<LPNDetail>
<ItemName>5054807025389</ItemName>
<DistroNbr/>
<DistributionNbr>TR001000002514</DistributionNbr>
<OrderLine>2</OrderLine>
<RefField2/>
<RefField3>OU01180705</RefField3>
<RefField4>0002</RefField4>
<RefField5>Retail</RefField5>
<Qty>4</Qty>
<QtyUom>Unit</QtyUom>
</LPNDetail>
<LPNDetail>
<ItemName>5054807025563</ItemName>
<DistroNbr/>
<DistributionNbr>TR001000002514</DistributionNbr>
<OrderLine>4</OrderLine>
<RefField2/>
<RefField3>OU01180705</RefField3>
<RefField4>0004</RefField4>
<RefField5>Retail</RefField5>
<Qty>2</Qty>
<QtyUom>Unit</QtyUom>
</LPNDetail>'
from dual
)
-- End of SIMULATED table (for testing purposes only, not part of the solution)
-- Query begins below this line
select sum(x.qty) as total_quantity
from t,
xmltable('/Document/LPNDetail'
passing xmltype('<Document>' || t.str || '</Document>')
columns qty number path 'Qty') x
;
Output:
TOTAL_QUANTITY
--------------
6