Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

Extract xml value from XML clob field

Posted on 2013-11-21
8
Medium Priority
?
885 Views
Last Modified: 2014-07-23
Hi,
I have a xml clob field 'data_area' in a table named 'xyz'. The value in the clob field 'data_area' looks like this:
<fpiInfo>
<effectiveDate>2013-04-21</effectiveDate>
<sex>M</sex>
<educationLevel>A</educationLevel>
<race>M</race>
<occupation>M</occupation><occupationStatus>M</occupationStatus></fpiInfo>

I want to extract effective date and race from this table 'xyz'.
0
Comment
Question by:baralp
  • 4
6 Comments
 
LVL 32

Expert Comment

by:awking00
ID: 39667152
select
extract(x.data_area,'/fpiInfo/effective_Date/text()').getstringval() as effectiveDate,
extract(x.data_area,'/fpiInfo/race/text()').getstringval() as race
from xyz x;
0
 
LVL 74

Expert Comment

by:sdstuber
ID: 39667174
you need to convert the clob into xmltype  using the XMLTYPE() constructor

SELECT EXTRACTVALUE(xmltype(data_area), '//effectiveDate'),
       EXTRACTVALUE(xmltype(data_area), '//race')
  FROM xyz
0
 
LVL 74

Expert Comment

by:sdstuber
ID: 39859963
baralp,

Did you try the answers above before closing the question?



The accepted answer should be producing an ora-00932 inconsistent datatypes error.


You can't apply the EXTRACT function to a text field (clob/varcahr2)

it only works on XMLTYPE and there isn't an implicit conversion from text types to xmltype
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 74

Expert Comment

by:sdstuber
ID: 39859992
also,  even if you do the xmltype conversion yourself,  the accepted answer still doesn't produce the correct results

It will return null for the efffectivedate rather than the expected 2013-04-21
0
 
LVL 74

Accepted Solution

by:
sdstuber earned 2000 total points
ID: 39860018
here's a simple test case illustrating the problems described above...

SQL> column effectivedate format a20
SQL> column race format a4
SQL> WITH xyz
  2       AS (SELECT '<fpiInfo>
  3  <effectiveDate>2013-04-21</effectiveDate>
  4  <sex>M</sex>
  5  <educationLevel>A</educationLevel>
  6  <race>M</race>
  7  <occupation>M</occupation><occupationStatus>M</occupationStatus></fpiInfo>'
  8                      data_area
  9             FROM DUAL)
 10  SELECT EXTRACT(x.data_area, '/fpiInfo/effective_Date/text()').getstringval() AS effectivedate,
 11         EXTRACT(x.data_area, '/fpiInfo/race/text()').getstringval() AS race
 12    FROM xyz x;
       EXTRACT(x.data_area, '/fpiInfo/race/text()').getstringval() AS race
       *
ERROR at line 11:
ORA-00932: inconsistent datatypes: expected - got -


SQL> WITH xyz
  2       AS (SELECT '<fpiInfo>
  3  <effectiveDate>2013-04-21</effectiveDate>
  4  <sex>M</sex>
  5  <educationLevel>A</educationLevel>
  6  <race>M</race>
  7  <occupation>M</occupation><occupationStatus>M</occupationStatus></fpiInfo>'
  8                      data_area
  9             FROM DUAL)
 10  SELECT EXTRACT(xmltype(x.data_area), '/fpiInfo/effective_Date/text()').getstringval()
 11             AS effectivedate,
 12         EXTRACT(xmltype(x.data_area), '/fpiInfo/race/text()').getstringval() AS race
 13    FROM xyz x;

EFFECTIVEDATE        RACE
-------------------- ----
                     M

SQL> WITH xyz
  2       AS (SELECT '<fpiInfo>
  3  <effectiveDate>2013-04-21</effectiveDate>
  4  <sex>M</sex>
  5  <educationLevel>A</educationLevel>
  6  <race>M</race>
  7  <occupation>M</occupation><occupationStatus>M</occupationStatus></fpiInfo>'
  8                      data_area
  9             FROM DUAL)
 10  SELECT EXTRACTVALUE(xmltype(data_area), '//effectiveDate') effectivedate,
 11         EXTRACTVALUE(xmltype(data_area), '//race') race
 12    FROM xyz;

EFFECTIVEDATE        RACE
-------------------- ----
2013-04-21           M

SQL>

Open in new window



Note you can fix the code of the 1st post like this...

SELECT EXTRACT(xmltype(x.data_area), '/fpiInfo/effectiveDate/text()').getstringval()
           AS effectivedate,
       EXTRACT(xmltype(x.data_area), '/fpiInfo/race/text()').getstringval() AS race
  FROM xyz x;

but it's a more complicated syntax than what is in the 2nd post
0
 

Author Comment

by:baralp
ID: 40215723
Admin,
Please unlock my ability to ask new question as it is already answered and resolved.

Thanks,
Paras
0

Featured Post

Receive 1:1 tech help

Solve your biggest tech problems alongside global tech experts with 1:1 help.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article started out as an Experts-Exchange question, which then grew into a quick tip to go along with an IOUG presentation for the Collaborate confernce and then later grew again into a full blown article with expanded functionality and legacy…
I remember the day when someone asked me to create a user for an application developement. The user should be able to create views and materialized views and, so, I used the following syntax: (CODE) This way, I guessed, I would ensure that use…
This video shows, step by step, how to configure Oracle Heterogeneous Services via the Generic Gateway Agent in order to make a connection from an Oracle session and access a remote SQL Server database table.
This video shows how to copy an entire tablespace from one database to another database using Transportable Tablespace functionality.
Suggested Courses

581 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question