Selection list: display null value

In a select list, I want to display the display value null as default in the selection list, whenever the form is opened.

Please suggest how to achieve this.

Sanjay

Hello

Change the selection list and choose the option 'Display null value' like 'yes '. Do not mention any value in the default value field.

Concerning
Jean Claude

Tags: Database

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Bar chart stacked - strange behavior on display null values

Hi all
I'm trying to graph a county of the end dates of the activities over several years by months grouped by project.
The problem I have is that there is a gap of 3 months where none of the activities that I am tracking complete. The default value for the stacked bar chart is to ignore the columns with no data (in my case it October-December 2015).
To view these any given month I went to properties graphic and ticked the box "Include Null values. At this point, I get a very strange behavior. Once this option is selected, the legend explodes, showing each project in the database regardless if it meets my criteria for analysis.
Has anyone another considering that happen? I'm doing something wrong?
If it's important I'm in the OBI 11.1.1.7.150120
Thank you for your help,
Kevin Wolfe

Hello

You have a filter on the list of projects you want to see?

Based on the way you describe your analysis I guess you don't have any what filter on the list of projects, but some of the filters on the other dimensions/attributes and these filters were limiting the list of projects.

If this is the case then what you see is not a weird behavior, but everything you've asked your analysis.

"Include null values" is not limited to the time dimension, it fits any dimension of your analysis, so no filter on projects = all projects.

How to display NULL value first in a result

Hi all

I have this simple query:

SELECT NULL as pay_period
FROM DUAL
UNION
SELECT DISTINCT pay_period
FROM period_table

All I want to do is display the value NULL value before everything else. I tried to do the sorting and all I could think about, but it did not work. Any ideas?

Expected results:

{null}
1
2
3
4
5
etc...

SQL> select null from dual
  2  union
  3  select deptno from dept
  4  order by 1 nulls first
  5  /

                                  NULL
--------------------------------------

                                    10
                                    20
                                    30
                                    40

5 rijen zijn geselecteerd.

Kind regards
Rob.

selection list dynamic default value
Hello world

I have a question about the dynamic selection lists.
I have a report of a table that displays records. Each record has different versions of data. So when you click on a folder you get to another page where you get some information on this record and where you can select the version of this information (using a selection list).

The selection list works very well and is set dynamically as follows:

Select distinct b.SID display_value,
return_value a.version_id
cn_pl_version a.,
cn_pl_std_peplanung b
WHERE a.version_ID = b.version_id AND
b.pe_id = "& P6_HELP_PRODET."
a.version_id desc order

My problem is that when I click on a folder that I always get the report filled with the oldest version of the current record, so I always choose the most recent version to the list manually. I always prefer to have the most recent version in the report.

The report query is:

Select
....
....

(select sum (stunden) in cn_pl_std_peplanung t02
where abt_id = '10'
and t02.pe_id = t1.pe_id
and t02.version_id = t1.version_id
and t02.idee_id = t1.idee_id) stunden_ir;

(select name from cn_pl_version u01
where u01.version_id = t1.version_id) Version

of cn_pl_std_peplanung t1, cn_pl_projektelemente z1, u1 cn_pl_version cn_pl_projektidee s1
where t1.version_id = ' & P6_VERSION_WAHL. »
and t1.pe_id = z1.pe_id
and z1.pe_id ='& P6_HELP_PRODET. »

Group of t1.pe_id, t1.version_id, t1.idee_id

' & P6_VERSION_WAHL.' is the element of the selection list
' & P6_HELP_PRODET.' is the ID of the current record

I don't know if you understand my problem, my English is not the best...

Thanks for any help!

Patrick
Hi Patrick,

What value choose it show list, when you create a branch to the page? That's the good?
If not, you must change your selection list, that the correct version is selected by default. You can set a 'default' value when you set the source of the element.

Otherwise, you may configure a sample application to http://apex.oracle.com.

Best regards
Chrissy

FTS by select as NOT NULL values

Hello

My version of Oracle is 10.2.0.3.0.

I'm shot under SQL in the database, this SQL is a FTS during the race.

SELECT *.
Table_name FROM
WHERE id_number IS NULL;

Pease see below for the nature of the existing data in the table.

SQL > select count (*) from table_name where id_number is null;

COUNT (*)
----------------
1456

SQL > select count (*) from table_name;

COUNT (*)
----------------
9392730

However, there is an index on the column id_number and the SQL where clause (where id_number is null) picks up only 0.1% of the rows in the table. Although SQL is a FTS on the table table_name. Is there a way I can remove this execute SQL FTS.

Thanks in advance.

Best regards
oratest

oratest wrote:
Means there is no another way/workaround to grant this SQL? :(

Major responses in this thread.

If you change the SQL statement or set up a bitmap index (not a good choice index if the table is subject to frequent changes), there is another solution. I think I've seen this approach on the blog of Richard Foote:
http://richardfoote.WordPress.com/2008/01/23/indexing-nulls-empty-spaces/

Here's a sample:

CREATE TABLE T1(
  C1 NUMBER NOT NULL,
  C2 VARCHAR2(50) NOT NULL,
  C3 NUMBER,
  C4 VARCHAR2(300));

INSERT INTO T1
SELECT
  ROWNUM,
  TO_CHAR(ROWNUM,'0000000')||'A',
  DECODE(MOD(ROWNUM,1000),0,NULL,ROWNUM),
  LPAD('A',300,'A')
FROM
  (SELECT
    ROWNUM RN
  FROM
    DUAL
  CONNECT BY
    LEVEL <= 1000) V1,
  (SELECT
    ROWNUM RN
  FROM
    DUAL
  CONNECT BY
    LEVEL <= 1000) V2;

CREATE INDEX IND_T1_C3 ON T1(C3);

EXEC DBMS_STATS.GATHER_TABLE_STATS(OWNNAME=>USER,TABNAME=>'T1',CASCADE=>TRUE)

The foregoing has created a ranking table 1 000 000, where 1 of 1,000 rows contains a NULL value. An index has been created and then on the table, and the statistics have been updated.

Now the first test:

SET AUTOTRACE TRACEONLY EXPLAIN

SELECT
  COUNT(*)
FROM
  T1
WHERE
  C3 IS NULL;

Execution Plan
----------------------------------------------------------
Plan hash value: 3724264953

---------------------------------------------------------------------------
| Id  | Operation          | Name | Rows  | Bytes | Cost (%CPU)| Time     |
---------------------------------------------------------------------------
|   0 | SELECT STATEMENT   |      |     1 |     5 | 10994   (2)| 00:00:45 |
|   1 |  SORT AGGREGATE    |      |     1 |     5 |            |          |
|*  2 |   TABLE ACCESS FULL| T1   |  2000 | 10000 | 10994   (2)| 00:00:45 |
---------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------
   2 - filter("C3" IS NULL)

Note that the index is not used. A second test with a slightly modified definition of the index:

CREATE INDEX IND_T1_C3_NULL ON T1(C3,' ');

EXEC DBMS_STATS.GATHER_INDEX_STATS(OWNNAME=>USER,INDNAME=>'IND_T1_C3_NULL')

SELECT
  COUNT(*)
FROM
  T1
WHERE
  C3 IS NULL;

Execution Plan
----------------------------------------------------------
Plan hash value: 265035506

------------------------------------------------------------------------------------
| Id  | Operation         | Name           | Rows  | Bytes | Cost (%CPU)| Time     |
------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT  |                |     1 |     5 |    25   (0)| 00:00:01 |
|   1 |  SORT AGGREGATE   |                |     1 |     5 |            |          |
|*  2 |   INDEX RANGE SCAN| IND_T1_C3_NULL |  2000 | 10000 |    25   (0)| 00:00:01 |
------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------
   2 - access("C3" IS NULL)

This time notice that the special index was used without having to change the SQL statement.

Charles Hooper
Co-author of "Expert Oracle practices: Oracle Database Administration of the Oak Table.
http://hoopercharles.WordPress.com/
IT Manager/Oracle DBA
K & M-making Machine, Inc.

SELECT statement showing null values
Hello

The SQL below works fine except it does not display recordings iif CAMPAIGN_NAME is null

Sorry I mentioned this before but I have a typing error gave the wrong way (I left the 'no' of the above statement)

Any ideas where I go worng is welcome

Thank you

Pete

Select the CAMPAIGN. CAMPAIGN_KEY,
CAMPAIGN_CODE,
CAMPAIGN_NAME,
LANGUAGE_NUMBER
campaign, CAMPAIGN_LANG
where the CAMPAIGN. CAMPAIGN_KEY = CAMPAIGN_LANG. CAMPAIGN_KEY
and LANGUAGE_NUMBER =: P1_LANG
and (instr (superior (CAMPAIGN_NAME), superior (nvl (: P260_REPORT_SEARCH, CAMPAIGN_NAME))) > 0)
Hello Pete

The answer is somewhat the same thing:

Replace
and (instr (superior (CAMPAIGN_NAME), superior (nvl (: P260_REPORT_SEARCH, CAMPAIGN_NAME))) > 0)
with
and)
(instr (superior (CAMPAIGN_NAME), superior (nvl (: P260_REPORT_SEARCH, CAMPAIGN_NAME))) > 0)
or CAMPAIGN_NAME IS NULL
)

Roel

Value for the select list
Hello

Can someone please let me know how to value to select list (display Null value: Yes, the Null value to display:--select--) through the text field and button.) When I enter a value in the text field and click the button, and then select field must be filled with the respective value.

I tried to make it through the writing of a query in the source and through dynamic action button, they are populating the value to select the list but we null is folded down, then we must click on the selection list to display the value, but I want the value that is returned to be visible visible null instead.

Kind regards
Shoaib
Hello
>
Can someone please let me know how to value to select list (display Null value: Yes, the Null value to display:--select--) through the text field and button.) When I enter a value in the text field and click the button, and then select field must be filled with the respective value.
>
a. What is the source of the LoV? Static? Dynamics?
b. the value that you set using point and button is the value display or the return value of the LoV? It should be the return value.
>
I tried to make it through the writing of a query in the source and through dynamic action button, they are populating the value to select the list but we null is folded down, then we must click on the selection list to display the value, but I want the value that is returned to be visible visible null instead.
>

As you mention DA, you are on 4.x. But it is better to ask clearly the Apex version.
See you soon,.

PS: What you have specified in the Retrun Null value?

Published by: Dominique on July 20, 2012 13:31

NVL selection list does not not on the place where clause in query

Ok. APEX 4.2...
Im having problems with my selection lists and NULL values... I see that it has come time and time again...
I have a tabular presentation, with a query based on a selection list. The selection list has the ability to '- Show All -'... The value of the selection list is a number, and the display is words... (for reference the LOV query is: select status, batch from pmt_stat_lookup by 1)
Initially I had problems with null and invalid numbers like ' display Null = 'Yes' and the problem of null % ', so have used the code in this blog to remove the NULL values... Display Null = & amp; #34; Yes & amp; #34; and the problem of null % | Inside Oracle APEX by Patrick Wolf
Then in the application of my report, I have a where clause clause that checks the value of the selection list... WHERE batch = nvl(:P11_STATUS_SELECT,STATUS_ID)
everything works almost fine, and I can choose a status, or I choose - see the All-, but the query will not include the lines where the State is null.
(I also see that maybe I should be, use the case statement instead of the NVL on where clause, but not sure of the syntax. In addition, NVL was used somewhat in the different reports in the application...)
For reference, the code of the old blog that I as a process page is:
BEGIN
FOR rItem IN
(SELECT NOM_ELEMENT
OF APEX_APPLICATION_PAGE_ITEMS
WHERE APPLICATION_ID = TO_NUMBER(:APP_ID)
AND PAGE_ID IN (TO_NUMBER(:APP_PAGE_ID), 0)
AND LOV_DISPLAY_NULL = 'Yes'
AND LOV_DEFINITION IS NOT NULL
-change here
AND LOV_NULL_VALUE = '% null | '%'
)
LOOP
IF V (rItem.ITEM_NAME) = "% null | '%'
THEN
Apex_Util.set_session_state (rItem.ITEM_NAME, NULL);
END IF;
END LOOP;
END;
Thank you very much
Richard

Richard,

Perhaps this example can help you solve your problem.

https://Apex.Oracle.com/pls/Apex/f?p=63838:2

Jeff

"Select list" Application point displays Null instead of "select value".
I have defined an agenda of the application in the form of select list and I try to display 'Select a value' of a null value. I put "Display value Null" "Select value" and the value of display Null values yes. I would like to than the message "select a value ' to always show when the user enters the initial values for 'CREATE' an entry in the table." The user is not required to enter a value. I would like to just display the message anyway. How to "do" APEX the message. Even if I set values, nothing appears.
Ok. I found the answer. I just needed to include IS NOT NULL in the WHERE CLAUSE of my statement Select mapped to my Select list and the Extra Null disappear and allow my message to display on the application page.

Published by: V Rickert on April 23, 2013 09:33

Null value in the selection list
I was wondering if there is a way to get a select list to return a value zero?

I have a query with a condition like this where clause
```
instr(upper("TYPE"),upper(nvl(:P3_TYPE,"TYPE"))) > 0 
```
Where: P3_TYPE is a selection list. However, when it is null, no value no is returned in the report of sql - I guess that the nvl function is not picking up with the null value. I just that it displays all of the records when the value is zero in the list.

Thanks in advance,
Trent
use
```
instr(upper("TYPE"),upper(nvl(DECODE(:P3_TYPE,'null',NULL,:P3_TYPE),"TYPE"))) > 0
```
When your selection list returns "null" for NULL values. Please note that select the return list value is a string that is not equivalent to PL/SQL NULL

See you soon,.
Hari

List of field values - value blank or select the new entery (creation).

Hello
I created an application for employees of the staff:
I have a list of values that fills the names of employees, based on a table (the table employees
The field is called EMP_REPORTS_TO (which is the employee)
When I create a new employee, the field is already filled with a name.
Q: How can I change is therefore the field said to select or is null (empty) when creating/adding a new employee
Thanks in advance.
KP

Hello

a4da0ea0-90f7-4631-A736-144c3a8a5e31 wrote:

Please change your user ID to something meaningful. Reference: Video tutorial how to change username available

I created an application for employees of the staff:

I have a list of values that fills the names of employees, based on a table (the table employees

The field is called EMP_REPORTS_TO (which is the employee)

When I create a new employee, the field is already filled with a name.

Q: How can I change is therefore the field said to select or is null (empty) when creating/adding a new employee

Thanks in advance.

Go to the field attributes EMP_REPORTS_TO-> section of the list of values and set:
- Display Null value-> yes
- Null-> - Select value-
How do you access the form page? I guess that the click of a button with the button action the value-> to navigate to the Page of this Application.

If Yes indicate your number of page in the section to clear the Cache, so that it clears the session state from the new entry form.

Kind regards

Kiran

Reset the value of the selection list
APEX version: 4.2.2

I'm fighting to implement a solution to reset the value of an element from the list of selection on a page in my application.

I currently have about 4 pages in my application with a level of tabs with every page on its own tab.

I have a report of Emp page that lists employees. The page contains an element of selection list for emp_no who submits the page when the value changes. The query for the list of selection queries the emp for name and emp_no table. It has:
Display additional values: Yes
Display Null values: Yes
Display NULL value: all THE
Return NULL value:
(no value for the return NULL value)
Page, in itself, works the way you want. During the first visit to the page, EVERYTHING is selected and the report shows all the EMOS. If I select a specific employee, the page refreshes with just this employee.

On the Main page is another employee list report. The report has a link between the employee id column and the Emp report page. The link sets the value of Emp.emp_no to the value of Main.emp_no. It works very well so if I take emp hand 123, 123 shows Emp.emp_no and the report shows that retail for emp 123.

The problem is when a specific employee has been selected previously from the homepage or the Emp page and I click on a tab to another page, say the status tab / page and then click on the tab of the page of the Emp. The current behavior of the page, is that it continues to show some used was previously selected regardless of how it has been set, either Emp or to the homepage page. I want to reset select Emp.emp_no ALL (or null) if I navigate to the page of the Emp to any other page except hand or Emp itself.

I searched through the forums and tried to use processes at the level of the page and after region to reset the value of Emp.emp_no, but nothing has worked. I believe there is a 'simple' way to do it that doesn't require coding on each page to set Emp.emp_no on a null value before calling it.

I would like ideas on solving this seemingly simple task that has managed to escape.

Thanks in advance.

cagora
Use a query in your link for filtering the selection list. Create a compuation on the definition page of the selection to NULL list if the request is NULL > PL/SQL Expression >: APPLICATION IS NULL. In this way, you can check the list of selection gets nulled while accessing the page normally.

Denes Kubicek
-------------------------------------------------------------------
http://deneskubicek.blogspot.com/
http://www.Apress.com/9781430235125
https://Apex.Oracle.com/pls/Apex/f?p=31517:1
http://www.Amazon.de/Oracle-Apex-XE-Praxis/DP/3826655494
-------------------------------------------------------------------

creation of selection using comma-separated values list
Hi all

I have the column in the database containing values separated by commas
for ex: Pune, Mumbai, Bangalore...

I want to create the selection list using higher values.
for ex: Pune
Mumbai
Bangalore

Please help me on this issue.

Thanks in advance,
Jitendra
Hello

Try the following
```
select regexp_substr(YOUR_FIELD_NAME,'[^,]+', 1, level) display_value,
       regexp_substr(YOUR_FIELD_NAME,'[^,]+', 1, level) return_value
  from YOUR_TABLE
  connect by regexp_substr(YOUR_FIELD_NAME, '[^,]+', 1, level) is not null
```
Concerning

Graham

Published by: gpc on February 1, 2012 11:27

indicates the column NULL values if I need display - (hifen or less symbol)
In the Obiee displays NULL values if I need display - (hifen or less symbol),
Please someone help me...

Thank you
René-coral
If your column is around, then she can raise error. Try:
IFNULL (cast (column as a varchar (10)), '-')

Selection list cascading in the dialogue window

Hello
I'm developing in Apex 4.2.5.
I have an Apex with a classic report region, in which a link edit page opens a dialog window (in the same page apex) to edit the selected line. The same dialog window is used to create a new line. The dialog window contains a cascading pick list. Two selection lists are defined to display NULL values and correctly fill in mode 'create '. My problem is that mode "Modify" the list of the second selection is not good value. The second selection list contains it however the right subset of values according to the parent, select the list and therefore don't does not contain the correct value, but it is not selected.
I use a javascript function to fill in the fields in the dialog.
....
$s ("P3_EVENT_TYPE", arguments [1]);
$s ("P3_EVENT_SUBTYPE", [2] arguments);
....
Then the display of the dialog window
openDialog ('editEvent');

The population of P3_EVENT_SUBTYPE list seems to happen but sometime after that all the fields in the dialog were assigned and the dialogue window displays.
I see that I need to somehow update the list of selection in cascade, P3_EVENT_SUBTYPE, before assigning the value. My problem is how can I do this in the same javascript function?
Kind regards
Derek

Eventually answered my own question-

I created a hidden field in which to store the value of the event subtype.

Created a dynamic of Action, after refresh of affected P3_EVENT_SUBTYPE subtype value = hidden field event.

Selection list: display null value

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