sql,xml,oracle , Extracting XML data from CLOB


Extracting XML data from CLOB

Question:

Tag: sql,xml,oracle

How can I extract Food ItemID and Food Item Name and Quantity from the data as mentioned below. This is in clob column in plsql.

<ServiceDetails>
    <FoodItemDetails>
        <FoodItem FoodItemID="6486" FoodItemName="CARROT" Quantity="2" Comments="" ServingQuantityID="142" ServingQuantityName="SMALL GLASS" FoodItemPrice="50" ItemDishPriceID="5336" CurrencyName="INR" Currency Id="43"/>
    </FoodItemDetails>
    <BillOption>
        <Bill Details Total Price="22222" BillOption="cash"/>
    </BillOption>
    <Authoritativeness/>
</Service Details>

Answer:

Use xmltable.

Data setup:

create table myt(
col1 clob
);

insert into myt values('<ServiceDetails>
    <FoodItemDetails>
        <FoodItem FoodItemID="6486" FoodItemName="CARROT" Quantity="2" Comments="" ServingQuantityID="142" ServingQuantityName="SMALL GLASS" FoodItemPrice="50" ItemDishPriceID="5336" CurrencyName="INR" CurrencyId="43"/>
    </FoodItemDetails>
    <BillOption>
        <BillDetails TotalPrice="22222" BillOption="cash"/>
    </BillOption>
    <Authoritativeness/>
</ServiceDetails>'
);

commit;

Query:

select cols.*
from myt
cross join xmltable('ServiceDetails/FoodItemDetails/FoodItem' passing xmltype(col1)
            columns fooditemid varchar2(10) path '@FoodItemID',
                fooditemname varchar2(20) path '@FoodItemName'
        ) cols;

Result:

FOODITEMID FOODITEMNAME
---------- --------------------
6486       CARROT

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