Generating XML Tags Using SQL Query

We have a standard oracle package to generate the XML Tags.
We just need to pass the SQL statement as parameter to the package

Below is an example, which prints Todays date as XML Tag

SELECT   DBMS_XMLGEN.getxml ('select sysdate today_date from dual') xml
  FROM   DUAL;


Below is the output, which you can see by executing above SQL

<?xml version="1.0"?>
<ROWSET>
<ROW>
<TODAY_DATE>21-NOV-11</TODAY_DATE>
</ROW>
</ROWSET>



ROWSET and ROW are the default tags, which gets printed for any sql using this package.
TODAY_DATE is the main tag printed by SQL statement, which we have passed to the package.

       **********************************************************************************************************

There is another way to get the same output using some other functions.
Let me start off with a simple query to print TODAY_DATE tag only

SELECT   XMLELEMENT ("TODAY_DATE", SYSDATE) FROM DUAL;

Below is the output for the above statement

<TODAY_DATE>2011-11-21</TODAY_DATE>

Now, Let me change the date format as DD-MON-YY

SELECT   XMLELEMENT ("TODAY_DATE", TO_CHAR (SYSDATE, 'DD-MON-YY')) 
FROM DUAL;

Below is the output for the above statement

<TODAY_DATE>21-NOV-11</TODAY_DATE>

Now, i will modify the query to get same output as we got using standard package

SELECT   '<?xml version="1.0"?>'
         || XMLELEMENT (
               "ROWSET",
               XMLELEMENT (
                  "ROW",
                  XMLELEMENT ("TODAY_DATE", TO_CHAR (SYSDATE, 'DD-MON-YY'))
               )
            )
  FROM   DUAL;

Below is the output for the above statement, which is same as what we got using standard package

<?xml version="1.0"?>
<ROWSET>
<ROW>
<TODAY_DATE>21-NOV-11</TODAY_DATE>
</ROW>
</ROWSET>