如何在Oracle SQL Developer中提取和求和xml属性值

Question

I have a lot of large xml messages stored as CLOBs in a column xml_message in table online_message . For example the messages looks something like this:

<?xml version="1.0" encoding="utf-8" ?>
<CustomerDetails xmlns="http://something.com/version/1.0">
<CustomerId>100345</CustomerId>
<AccountDetails Account="account1" Value="103"/>
<AccountDetails Account="account2" Value="142"/>
<AccountDetails Account="account3" Value="345"/>
<AccountDetails Account="account4" Value="634"/>
</CustomerDetails>

<?xml version="1.0" encoding="utf-8" ?>
<CustomerDetails xmlns="http://something.com/version/1.0">
<CustomerId>100465</CustomerId>
<AccountDetails Account="account5" Value="198"/>
<AccountDetails Account="account6" Value="567"/>
<AccountDetails Account="account7" Value="1984"/>
<AccountDetails Account="account8" Value="84"/>
</CustomerDetails>

I want to get all the Value attributes in all xml messages and sum them up. So the final result (in this example) should be 103+142+345+634+198+567+1984+84=4057. Any idea how i can do this in sql developer?

Thanks!

Answer 1

You may want to try this:

SELECT sum(t.v) 
FROM online_message, XMLTABLE('for $i in //*/@Value return $i' 
  PASSING online_message.xml_message 
  COLUMNS v NUMBER PATH '.') t
;

Answer 2

here is a related method - you can try to edit for your purposes.

select Sum(
         to_number(
            extractvalue(
               xmltype(
                  dbms_xmlgen.getxml('select count(*) c from '||table_name)),'/ROWSET/ROW/C'))) count
from user_tables;