oracle - PL SQL xmlelement: How to get data in xml from mutually exclusive condition on same tables -


i fetching data database using xml . here tables:

settings table:

class   code    name 'm1'    1       food1 'm1'    2       food2 'p1'    1       payincash 'p2'    2       payonline  customer table: customer_id  food_name  payment_method cus123          1         1  cus123          2         2

as can see, have used internal codes map detail

i want write query give following output:

query output: customer_id  food_name  payment_method cus123          food1      payincash  cus123          food2      payonline

i want retrieve data in xml format,that's why using xmlelement.

select xmlelement("customer_records",                    xmlagg(                         xmlelement("record",                             xmlelement("cus_id", customer_id),                             xmlelement("food", food_name),                             xmlelement("payment", payment_method)                         )                     )              )              customer              customer_id = 'cus123';

you can see can't join because of because conditions. please help.

try dependent subqueries, in way:

select customer_id,        ( select name settings s          class 'm%' , s.code = c.food_name ) food_name,        ( select name settings s          class 'p%' , s.code = c.payment_method ) payment_method  customer c;

example using xmlagg:

select xmlelement("customer_records",                    xmlagg(                         xmlelement("record",                             xmlelement("cus_id", customer_id),                             xmlelement("food", food_name),                             xmlelement("payment", payment_method)                         )                     )              ) (       select customer_id,              ( select name settings s                class 'm%' , s.code = c.food_name ) food_name,              ( select name settings s                class 'p%' , s.code = c.payment_method ) payment_method        customer c );

result:

<customer_records>     <record>         <cus_id>cus123</cus_id>         <food>food1</food>         <payment>payincash</payment>     </record>     <record>         <cus_id>cus123</cus_id>         <food>food2</food>         <payment>payonline</payment>     </record> </customer_records>

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