how to use xmltable in oracle?

oracle, xml

Solution

`action` and `object` on your example aren't on the same level, so your query has to perform additional steps. Here's an example:

SQL> create table users (id number, profile xmltype);

Table created.

SQL> insert into users values (1, XMLTYPE('<profile>
  2      <subject>I
  3         <action>like
  4             <object>sports</object>
  5             <object>music</object>
  6         </action>
  7      </subject>
  8  </profile>'));

1 row created.

SQL> select u.id, x.action, x.object.getStringVal()
  2    from users u,
  3         XMLTABLE('/profile/subject/action'
  4                  passing u.profile
  5                  columns action VARCHAR2(30) PATH 'text()',
  6                          object XMLTYPE PATH 'object') x;

ID  ACTION  X.OBJECT.GETSTRINGVAL()
--- ------- --------------------------------------------------
1   like    <object>sports</object> <object>music</object>

As you can see we got the node, not really what you want so we add an `XMLTABLE`:

SQL> select u.id, x.action, y.object
  2    from users u,
  3         XMLTABLE('/profile/subject/action'
  4                  passing u.profile
  5                  columns action VARCHAR2(30) PATH 'text()',
  6                          object XMLTYPE PATH 'object') x,
  7         XMLTABLE('/object'
  8                  passing x.object
  9                  columns object VARCHAR2(30) PATH '.') y;

ID  ACTION  OBJECT
--- ------- -------
1   like    sports
1   like    music

Problem

I am using Oracle's XML DB to create user profiles. I stored user profiles in a single XMLTYPE column with other relational columns (id, username, password) in the table. The XML is of the following format: ``` <profile> <subject>I <action>like <object>sports</object> ... <object>music</object </action> </subject> </profile> ``` I used the following query, ``` SELECT * FROM user, XMLTABLE( '//profile' PASSING user.profile return COLUMNS action VARCHAR2(20) PATH '/subject/action', object VARCHAR2(30) PATH '/subject/action/object' ); ``` which gives me nothing. How could I make this thing work?

Original source