Once more - tabular form / update only rows that have changed

I know it's been asked before, but I haven't seen an answer I like. :-)
I have a query that includes a single column the user can update, using APEX_ITEM.TEXT(10, updateable_field, 10, 10)
I have an additional APEX_ITEM.HIDDEN(21) and APEX_ITEM.HIDDEN(22) that hold the two fields of the composite primary key. In order to track whether my updateable_field had changed, I created APEX_ITEM.HIDDEN(11, updateable_field), which I expected would hold the OLD value of the field. See where I'm going with this? :-)
I'm attempting to loop through apex_application.g_f21, get the values for F10 (new) and F11 (old) and compare them. If they're different, I'll do the update.
It works fine if the old value (F11) is empty and I plug in a new value (to F10).
But if I change a field that had already has a value (in F11) and make it NULL, I notice that F11(i) doesn't exist. In that case, I set the value to NULL, and the compare fails because it thinks the row is unchanged.
Can someone suggest or point me to an alternate method that works?
Thanks as always,
Stew

Mike,
Thanks for the suggestion, which is a good one. But I had that one covered.
I have it working now, and I believe the fix was that I moved the APEX_ITEM.HIDDEN that contained the old value in the query. I'd had it concatenated with the column for the new value (which used APEX_ITEM.ITEM). I changed it to concatenate to a plain string value. And now the array has values in it, which I can properly compare.
Thanks again. That was really driving me nuts!
Stew

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"SUPPLIER",
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Displaying the rows that have been updated....

SQL> select * from spr;
EMP_NAME EMP_no age sex
hry 45353 42 M
spt 43436 34 M
pen 34533 21 M
aen 65475 33 M
SQL> select * from sprfac;
EMP_NAME EMP_no age sex Appraisal Extra_Time
hry 45353 N N
spt 43436 N N
pen 34533 N N
aen 65475 N N
I have a problem regarding updating the sprfac table.
What i need is to satisfy the following conditions and update the second table with values in the second table.
I need to upadate the second table when:
1. The emp_name and emp_no of first table matches with the second table and
2. The Appraisal field and extra_time field should be 'N' in the second table and
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Let me explain in detail.
My original table is sprfac. spr is Temporary Table.
I have some data in flat files and i have loaded all the data into a temporary table using sqlloader. Now i need to update the second table.
Originally the age and sex fields in the sprfac table are NULL. Once i update the age and sex fields in the sprfac table again if i do update it should not update the rows which have data in age and sex columns.
Suggest me how to update multiple columns simultaneously or send me the code for the update statement if possible.
NOTE: I have changed the tablenames and column names since i cannot keep the original tables here.
And i got the following reply........
update sprfac a
set (a.age, a.sex) = (select b.age, b.sex from spr b
where a.emp_name = b.emp_name
and a.emp_no = b.emp_no
and appraisal = 'N'
and extra_time = 'N')
where a.age is null
and a.sex is null;
Everything is working fine.
Is there any way to send the name and age fields which have been updated of sprfac to a file.
should i use cursors....
Send me the code if possible....
Thanks..........

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Ok, before anyone asks, yes, I did read the how-to:-)
I have a custom tabular form, which I did cause I need to use popups and the popups that you can use in the wizard tabular form does not display the text but rather the value underneath it.
It returns data rather nicely and when I go and update values I can tell it is changing the fields underneath. I put a process in that will display the values in text fields on the form (for one row only) and I see them changing from what is already there and with the proper values.
However, when I do that the data that is displayed then gets reverted back to what it was previous to the update but reports that the process was successful.
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SQL to generate the tablular form...
SELECT x.sak_release_db
, x.sak_object
, x.sak_release
, x.sak_participant
, x.sak_csr
FROM
(SELECT htmldb_item.hidden(1,sak_release_db) sak_release_db
, htmldb_item.popupkey_from_query(2, sak_object,
'SELECT b.nam_schema||''.''||a.nam_technical as table_name , b.sak_object
FROM system_object a
, database_table b
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'SELECT b.nam_schema||''.''||a.nam_technical as table_name , b.sak_object
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Florian,
Checkboxes are different from other HTML form items. When you have a text box for example, there's always a value send to the server when submitting. Even if that value is NULL. When you have a checkbox however, you only get the value if the checkbox is checked. It's not posted to the server when it is not checked. That's the general behavior of HTML forms and not specific to Oracle HTML DB.
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http://www.oracle.com/technology/products/database/htmldb/howtos/checkbox.html#CHECKBOX_IN_REPORT
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APEX 4.1.0, Oracle 10g
Error is: Current version of data in database has changed since user initiated update process. current row version identifier = "47FAF7A2C1A5E49E0CF90D1320CCFC50" application row version identifier = "0"
I've seen this error in the forums for tabular forms, but my form is just a normal apex page with a standard fetch and a standard insert/update/delete process. It isn't a tabular form or a master/detail, just a simple form. There is not another person using the data. This happens on an update or delete and on several different pages for several different tables!
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into wwv_flow.g_column_values(1),wwv_flow.g_column_values(2),wwv_flow.g_column_values(3),wwv_flow.g_column_values(4)
from "BASIS"."NARRATIVES" where "NARR_ID" = :p_rowid for update ; end; end;
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Based on the error message, one of the checksums is "0". I'm not sure if the "application row version identifier" is the first checksum or the second checksum, but either way it shouldn't be zero. Right? So, why would this checksum be zero?
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MFOConsulting Switzerland
[email protected]

Hi All Apex Experts,
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Tabular form update

Hi everyone,
I am working on apex 4.1, oracle 11g database.
I have a tabular form with a first column of checkboxes.
I want to check all the rows taht interest me, and update them with a value from a select list.
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See this http://docs.oracle.com/cd/E23903_01/doc/doc.41/e21676/apex_app.htm#CHDICJDA

Once more - tabular form / update only rows that have changed

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