Selecting Randoms from Query of Queries

I can create a query that selects random records
<cfquery....>
select top 10 * from table order by newid() 
</cfquery>
or
<cfquery....>
select top 10 * from table order by rand() limit 10 
</cfquery>
However, is there a way to cache a query then select random
records from it?
I want to cache the overall query that retrieves all the
records, then
randomly pull
from that cached query.
If I use newid() or rand(), the query bombs on the
parentheses.
Any suggestions?
Tami

Similar Messages

Display select list from query on manual tabular form

Hello,
I'm trying to display a select list from query on a manual tabular form. I'm using a collection to store the data. I can't seem to get the query to work. I can display the item as a text item. Any help would be appreciated. Thanks, Elizabeth.
SELECT
-- Notice how I'm keeping the idx value the same as the column value in the collection. This helps to keep things organized
-- I also apply an id to each entry
-- I append the error value to the empname and sal
-- The Seq_id. Usefull when hiding rows (for delete) and then submitting from
apex_item.hidden(1,x.seq_id, null, x.seq_id || '_seq_id') ||
-- The Primary Key of the column
apex_item.hidden(2, x.ceah_people_id, null, x.seq_id || '_ceah_people_id') || x.ceah_people_id ceah_people_id,
-- Employee Name
case when x.seq_id = -1
then
apex_item.select_list_from_query (3,
NULL,
'select distinct language_name d, '
|| 'language_id r from foreign_language',
'style="width:170px" ' ,
'YES',
'0',
'- Select Language -',
'x.seq_id_' || LPAD (9900 + LEVEL, 4, '0'),
NULL,
'NO'
else
apex_item.text (3,(select language_name from foreign_language where x.language_id = foreign_language.language_id),
80,
100,
'style="width:170px" readonly="readonly"',
'f32_' || LPAD (ROWNUM, 4, '0')
end
|| err.language_id language_id,
/* apex_item.text(3,x.language_id,null, null, null, x.seq_id || '_language_id') || err.language_id language_id,
-- Employee Salary
apex_item.text(4,x.proficiency, null, null, null, x.seq_id || '_proficiency') || err.proficiency ||
-- Store the sql action type as well.
apex_item.hidden(50,x.sql_action_typ, null, x.seq_id || '_sql_action_typ_id') proficiency,
-- Last but not least the row error
err.row_error
FROM (SELECT ac.c001 seq_id,
ac.c002 ceah_people_id,
ac.c003 language_id,
ac.c004 proficiency,
ac.c049 modifiable_flag,
ac.c050 sql_action_typ
FROM apex_collections ac
WHERE ac.collection_name = 'DATA_COLLECTION'
ORDER BY ac.seq_id) x,
-- Error Collection
(SELECT ac.seq_id seq_id,
ac.c002 ceah_people_id,
ac.c003 language_id,
ac.c004 proficiency,
ac.c050 row_error -- Useful when individual data is correct, however the row of data is not. Ex: start/end dates
FROM apex_collections ac
WHERE ac.collection_name = 'ERROR_COLLECTION'
ORDER BY ac.seq_id) err
WHERE x.seq_id = err.seq_id(+)

I got so frustrated I started over. I'm following the how to create a manual form.
http://www.oracle.com/technology/products/database/application_express/howtos/tabular_form.html#MANUAL
The problem I'm now having is even though I display items as hidden, there is a column holder on the report for them. If I go into the report attributes and toggle the show attribute off I cannot reference an items value in my logic. I used /&nbsp/ for the column heading but I still get the little sort arrow where the column heading should be. I tried to toggle the sort attribute off but the sort arrow still shows up. How can I use the apex_item.hidden and not get a place holder for the column on a report? Thanks, Elizabeth
Here is the code I'm using to generate the report:
select x.ceah_people_lang_id,
x.language_id,
x.proficiency,
x.ceah_people_id
from (
select apex_item.hidden(1,ceah_people_lang_id) ceah_people_lang_id,
apex_item.select_list_from_query(2,language_id,'select language_name, language_id from foreign_language') language_id,
apex_item.select_list_from_query(3,proficiency,'select name, id from proficiency') proficiency,
apex_item.hidden(4,ceah_people_id) ceah_people_id
from ceah_people_language where ceah_people_language.ceah_people_id = :P152_person_id
union all
select apex_item.hidden(1,null) ceah_people_lang_id,
apex_item.select_list_from_query(2,null,'select language_name, language_id from foreign_language') language_id,
apex_item.select_list_from_query(3,null,'select name, id from proficiency') proficiency,
apex_item.hidden(4,null) ceah_people_id
from dual) x

Select list from query in report

Hello everybody,
I want to include a select list from a query in a report's colomn, but the select list should only be displayed conditionally. I wanted to do this with the help of "case when" in the corresponding SQL statement.
The select list itsself works, but when I combine it with "case when" I always get the error message:
ORA-01427: single-row subquery returns more than one row
The select statement is as following:
select
htmldb_item.checkbox(1,rownum) " ",
x.idee,
x.stunden_ilp,
x.stunden_ild,
x.stunden_ilm,
x.stunden_ief,
x.stunden_ir,
x.pe_id,
x.l_art_id,
x.version_id
from (
select
(select case
when (select name from cn_pl_projektidee s01
where s01.idee_id = '2') IS NULL then
(select distinct htmldb_item.select_list_from_query(5,name,'select distinct name from cn_pl_projektidee') name from cn_pl_projektidee s01
where s01.idee_id = t1.idee_id)
else
(select distinct htmldb_item.text(5,name) name from cn_pl_projektidee s01
where s01.idee_id = t1.idee_id)
END from cn_pl_std_peplanung t1) Idee,
from cn_pl_std_peplanung t1, cn_pl_projektelemente z1, cn_pl_version u1, cn_pl_projektidee s1
where t1.version_id = '&P6_VERSION_WAHL.'
and t1.pe_id ='&P6_HELP_PRODET.'
and t1.l_art_id ='&P6_L_ART_ID.'
group by t1.pe_id, t1.version_id, t1.idee_id, t1.l_art_id) x
order by x.ideeDoes anybody know what could be the problem or what other solutions I could try??
Greetings!
Patrick

Found 2 ways to solve it:
*1. dynamic action (JQuery)*
$("#f20_1234 option[value=13]").attr('selected', 'selected');
*2. process*
BEGIN
HTP.p('<script type="text/javascript">');
--HTP.p('problem()');
HTP.p('html_SetSelectValue(''f20_903'',188)');
HTP.p('html_SetSelectValue(''f20_903'',189)');
HTP.p('</script>');
END;

PL/SQL select list from query

Hello,
I am trying to modifying a PL/SQL process. Wherever there was a reference to the Application ID, I wanted to change it to refer to the Application Alias.
Here is the original code:
declare
   cursor app_cur is
      select aa.application_id||' - '||aa.application_name app_name,
             aa.application_id
        from apex_applications aa
       where exists (select 1
                       from profiles p
                      where p.application_id = aa.application_id);
   cursor user_app_cur (p_user number, p_app number) is
      select to_char(profile_id)
        from user_app_profiles
       where user_id = p_user
         and application_id = p_app;
   v_profile   varchar2(10);
   v_count     number := 0;
   v_class     varchar2(15);
begin
   htp.p('<table class="t3standardalternatingrowcolors" cellpadding="0" cellspacing="0">');
   htp.p('<tr><th class="t3header" >Application</th><th class="t3header" >Profile</th></tr>');
   for app in app_cur loop
      v_count := v_count + 1;
      if mod(v_count,2) = 1 then
         v_class := 't3dataalt';
      else
         v_class := 't3data';
      end if;
      open user_app_cur(:P3_USER_ID, app.application_id);
      fetch user_app_cur
       into v_profile;
      if user_app_cur%notfound then
         v_profile := 'NONE';
      end if;
      close user_app_cur;
      htp.p('<tr><td class="'||v_class||'">'||app.app_name||
            '</td><td class="'||v_class||'">'||
            apex_item.select_list_from_query(40, v_profile,
              'select description, profile_id from profiles where application_id = '||app.application_id,
           null, 'YES', 'NONE', 'No Profile Assigned', null, null, 'NO')||
            apex_item.hidden(41,app.application_id) ||
          '</td></tr>');
   end loop;
   htp.p('</table>');
end;Here is my revised code:
declare
   cursor app_cur is
      select aa.alias||' - '||aa.application_name app_name,
             aa.alias
        from apex_applications aa
       where exists (select 1
                       from profiles p
                      where p.application_alias = aa.alias);
   cursor user_app_cur (p_user number, p_app varchar2) is
      select to_char(profile_id)
        from user_app_profiles
       where user_id = p_user
         and application_alias = p_app;
   v_profile   varchar2(10);
   v_count     number := 0;
   v_class     varchar2(15);
begin
   htp.p('<table class="t3standardalternatingrowcolors" cellpadding="0" cellspacing="0">');
   htp.p('<tr><th class="t3header" >Application</th><th class="t3header" >Profile</th></tr>');
   for app in app_cur loop
      v_count := v_count + 1;
      if mod(v_count,2) = 1 then
         v_class := 't3dataalt';
      else
         v_class := 't3data';
      end if;
      open user_app_cur(:P3_USER_ID, app.alias);
      fetch user_app_cur
       into v_profile;
      if user_app_cur%notfound then
         v_profile := 'NONE';
      end if;
      close user_app_cur;
      htp.p('<tr><td class="'||v_class||'">'||app.app_name||
            '</td><td class="'||v_class||'">'||
            apex_item.select_list_from_query(40, v_profile,
              'select description, profile_id from profiles where application_alias = '||app.alias,
           null, 'YES', 'NONE', 'No Profile Assigned', null, null, 'NO')||
            apex_item.hidden(41,app.alias) ||
          '</td></tr>');
   end loop;
   htp.p('</table>');
end;Here is the error:
ORA-06550: line 1, column 153: PL/SQL: ORA-00904: "F109NEWNAME": invalid identifier ORA-06550: line 1, column 7: PL/SQL: SQL Statement ignored
I think that the problem is in the table/LOV generation near the end, but I don't fully understand the apex_item.select_list_from_query function as it is written (I didn't write it).
Any help is greatly appreciated.
Thanks,
Matt

Hi Matt,
This line:
'select description, profile_id from profiles where application_alias = '||app.aliaswould become:
select description, profile_id from profiles where application_alias = F109NEWNAMEif F109NEWNAME was the app_alias. SQL would see F109NEWNAME as a variable as it is not in quotes. Therefore, you should change the line to:
'select description, profile_id from profiles where application_alias = ''' || app.alias || ''''to end up with:
select description, profile_id from profiles where application_alias = 'F109NEWNAME'which would make more sense
Andy

How to select Variable from Drop Down Queries - WAD 7.0

Hello All,
I've scenario where users will click on link and should see the default data of Daily and also have drop down box in the same web template where Weekly, Monthly, Quarterly and others must be displayed so that user can switch back & forth between views.
my Monthly, Quarterly & others are views out of a Query however my daily & weekly are separate queries where variables are populated, so that user can enter desired number of days or weeks that he/she wants to see data for.
<b>Question:</b>: when I use drop down to switch from monthly to daily or weekly I'm not seeing the variable which should populate so that user can enter number of days/weeks.
Please let me know if there is a solution for this - Thanks in advance!!!!..
Peja

Hi,
Try checking the data you are viewing in the drop down box. It may help to look at posted values instead of master data (or vice versa). Try changing that and see if it makes a difference. Also, are your variables navigational? If not, they will act as filters and you won't be able to change when you run. Check these settings and hopefully they will give some direction.
Cheers,
Rusty

A select list from query question

Hello all - I've looked in detail at a great deal of posts on this subject and believe what I am trying to achieve is not unusual or out of scope. Therefore it's likely me mis-interpreting something and I'd be grateful for anybody's input.
I have the following as a column in a report
apex.select_list_from_query( 21,
          a.reserved_by,
          'select g.user_name,g.user_id
          from users g, user_roles h
     where g.user_id=h.user_id and h.role_id in (2,3)'
     , null ,
     'YES',
     '-1',
     '- Not Reserved -') slov1 ,
If 'reserved_by' is null, I want '- Not Reserved -' to appear in the select list, otherwise I want the value in user_name. Where reserved_by is not null, I get the appropriate user_name returning the appropriate user_id. Where reserved_by is null, I get null returning null in the select list.
'- Not Reserved -' which is the value I've tried to assign to p_null_text, also appears in the select list and returns '-1' . However '-Not Reserved-' only appears as an extra option, rather than becoming the display value for reserved by=null.
So, if the values in reserved_by are 'user1','user2' and null and the P_query returns
'user1',1
'user2',2
'user3',3
my select list for the row having reserved_by=NULL looks like
user1
user2
user3
- Not Reserved -
NULL (ie blank).
Following a suggestion in a thread from 2005(!), I changed the p_query to
'select g.user_name,g.user_id
from users g, user_roles h
where g.user_id=h.user_id
and h.role_id in (2,3) union ALL
SELECT ''- Not Reserved -'' user_name, 0 user_id from dual',
null, NO'
and set p_show_null to 'NO'. This achieves the functionality I want. So perhaps, though I can't figure out what I was doing wrong with the 'correct' usage. Anyway, I'll post this in case it proves useful to others!
Toby

Hi Apex Experts,
can some one suggest me an alternate way to achieving this. I really have no idea on how to take this forward. :(
Any help/pointers will be highly appreciated.
Thanks,
Satya.
Edited by: Chaitu_Apex on May 13, 2010 3:50 AM

Selecting random from hashtable

Hi,
I need a datastructure in which I can store pairs of IP numbers and port numbers. This database might get pretty big (it's like a p2p application). A hashtable seems like a good choice. This way I can quickly check if a certain IP number is in the database.
But I also need to get a random entry from the database. Is there a nice and easy way to do this? Or should I opt for another datastructure ?
thanks in advance,

Thanks for the reactions.
My concern with these methods is that if I have a large database they will require a lot of extra memory. It will have to work for a database of a couple of thousands entries. That's purely theoretical, but scalability is a key point here.
Alex's solution clearly makes a distinct array which would use a lot of memory. Would the solution with the enumeration do the same? Or is the enumeration linked to the Hashtable so that it doesn't need a very large seperated structure in memory ?
cheers,

Query of queries disallows SQL right() function

We're attempting to do a query of queries using the SQL
right() function like this:
select *
from getresults
where right([key],charindex('\',reverse([key]),1)-1) not in
(#quotedvaluelist(getexcluded.file_name)#)
We've even replaced that where clause with a much more simple
where right([key])='m'
just to make sure that it wasn't the nesting functions that
were causing the problem.
In either case, we get the error:
Query of Queries syntax error.
Encountered "right" at line 0, column 0. Incorrect
conditional expression,
Expected one of [like|null|between|in|comparison] condition,
What SQL functions are disallowed from query of queries?
Thanks,
Kris

Nasty stuff huh. Just happened to discover myself today that
Left doesn't work. I'd suspect that Aggregate functions are the
ONLY ones that will work. It would have been nice if they'd at
least allowed CF vs DB functions in their own "database" language.
BTW, also discovered that Count() returns Null rather than 0
when there aren't any per your WHERE clause.

Select from Query ? / Dynamic view ? Anything else ?

Hello,
This could be a bit challenging. (or maybe not, i hope)
I have to create a report which is based on 3/4 tables with pretty complex SQL.
Step 1. I have to use views (in the database currently) to select data from these tables.
Step 2. Then create the next set of views (in the db) based on the previous views.
Step 3. Then finally join the last set of views in Reports and create the report based on the PARAMETERS entered.
This was fine, until the client changed the criteria. Now the views have to be created but the PARAMETERS affect the FIRST set of views.
That is, the views in the FIRST STEP will have a where condition based on the parameters at RUN TIME.
I was wondering about how to do this ?
1. Can I use dynamic views (in db) passing the where condition parameter to the where clause ? Alternatively use DDL in Reports.
OR
2. Create a query in Reports and create subsequent QUERIES BASED ON THE FIRST QUERY (like MS Access). Can this be done ?
3. Any other way ?
If you need any clarification, I can provide that.
THANKS for taking the time to read it. It would be great if you could give me any ideas.
Pat.

hello,
you might look into REF-CURSOR-QUERIES for this particular case. it might help.
regards,
the oracle reports team

Query to get the difference between 2 totals from 2 different queries

I wanted to know if it is possible to get the difference between 2 totals from 2 different queries. I would explain with an example:
1st query - Select sum(homepass) from table 1
2nd query – select sum(homepass) from table2
Is it possible to display the difference like-
Select sum(homepass) from table 1 - sum(homepass) from table2
I know the above query would gives syntax error but is there a better way or a trick to get the above task accomplished from a single query.
I hope, my question is clear.
Please revert with the reply to my query.
Regards

tomernitin wrote:
Try this one also:
WITH adtn1
AS
SELECT 110 val1 FROM dual UNION ALL
SELECT 100 FROM dual UNION ALL
SELECT 90 FROM dual UNION ALL
SELECT 10 FROM dual
adtn2
AS
SELECT 10 val2 FROM dual UNION ALL
SELECT 20 FROM dual UNION ALL
SELECT 30 FROM dual UNION ALL
SELECT 100 FROM dual
SELECT(Sum(a1.val1)-Sum(a2.val2)) Diff FROM adtn1 a1,adtn2 a2;
let me know if you still have any doubt.
Um.... I don't think so. Not with the cartesian join between a1 and 2.

Adding values from two different queries in one query

Hi,
I have developed a web template by combining 3 queries ,which were created from the same MultiProvider.These queries are having many different selections .Now I need to get the addition of values from these 2 queries into third query.
Is there any way to combine the selections from these queries into one instead of recreating them again.I tried to use global strucuture but not successful.
Kindly let me know is there any workaround for this.
Thanks & Regards,
Raja

Hi ,
You can do it by excel formula.
sheet 1 --> 1st query
sheet2 -->2nd query
sheet3--> put calculations accroding to your requirement based on sheet1 & sheet2 into sheet3.
Regards
Pcrao.

Query Issue with select level from dual

Hi,
I have a question regarding this query. The problem seems that when selecting level from dual while including another table the rows returned seem to increase exponentially.
I can add distinct and get the correct number of rows but am worried that this will cause a possible performance issue. Am I using the level option wrong?
I have included details below.
There are 4 rows in tbl_incidents
When I run the following queries I get rows returned based on the total number of rows
select start_date + level - 1, tbl_incidents.incident_id, level
from dual, tbl_incidents
where incident_id = 6
connect by level <= 1;
returns 1 row
select start_date + level - 1, tbl_incidents.incident_id, level
from dual, tbl_incidents
where incident_id = 6
connect by level <= 2;
returns 5 rows
select start_date + level - 1, tbl_incidents.incident_id, level
from dual, tbl_incidents
connect by level <= 3 and incident_id = 6;
returns 21 rows
select start_date + level - 1, tbl_incidents.incident_id, level
from dual, tbl_incidents
connect by level <= 4 and incident_id = 6;
returns 85 rows
select start_date + level - 1, tbl_incidents.incident_id, level
from dual, tbl_incidents
connect by level <= 5 and incident_id = 6;
returns 341 rows
So with
     r being the number of rows in tbl_incidents and
     l being the number used in the connect by for level and
     q being the number of rows returned by the query
     it appears that
q(l) = r * q(l-1) + 1
level 2:     4 * 1 + 1 = 5
level 3:     4 * 5 + 1 = 21
level 4:     4 * 21 + 1 = 85
level 5:     4 * 85 + 1 = 341
Thanks much,
Nora

Hi,
The dual table is used when you want to do something in SQL when you are not otherwise using a table.
Generating a "counter table" of the integers 1, 2, 3,..., X is an example
SELECT LEVEL   AS n
FROM    dual
WHERE   LEVEL   <= x;There is never any point in joining dual to another table, as in
select start_date + level - 1
,       tbl_incidents.incident_id
,       level
from    dual
,       tbl_incidents
where    incident_id = 6
connect by level <= x;You will always get the same more easily by just eliminating dual:
select start_date + level - 1
,       incident_id
,       level
from    tbl_incidents
where    incident_id = 6
connect by level <= x;It is quite useful and common to join a counter-table to a real table, like this cross-join:
WITH    counter_table AS
    SELECT LEVEL   AS n
    FROM    dual
    WHERE   LEVEL   <= x
select start_date + n - 1
,       incident_id
,       n
from    tbl_incidents
,       counter_table
where    incident_id = 6

How to select data from an aggregate in a customer exit for a query?

Hi,
I have written a virtual key figure customer exit for a query. Earlier the selection was from the cube, where there was severe performance issue. So I have created an aggregate, activated and have loaded the data.
Now when I select that data I find that the Key table is different in development and production. How do I resolve this.
My code is attached below. The table in developemnt is KEY_100027 and in production is KEY_100004. This code is activated and running in BW development server.
SELECT
    F~KEY_1000041 AS K____035
     F~KEY_1000271 AS K____035
     F~QUANT_B AS K____051
     F~VALUE_LC AS K____052
INTO (xdoc_date, xval1, xqty1)
UP TO 1 ROWS
FROM
FROM
*/BIC/E100004 AS F JOIN
/BIC/E100027 AS F JOIN
/BIC/DZMM_CGRNU AS DU
ON FKEY_ZMM_CGRNU = DUDIMID
JOIN /BI0/SUNIT AS S1
ON DUSID_0BASE_UOM = S1SID
JOIN /BI0/SCURRENCY AS S2
ON DUSID_0LOC_CURRCY = S2SID
JOIN /BI0/SMATERIAL AS S3
*ON FKEY_1000042 = S3SID
ON FKEY_1000272 = S3SID
JOIN /BI0/SMOVETYPE AS S4
*ON FKEY_1000043 = S4SID
ON FKEY_1000273 = S4SID
JOIN /BI0/SPLANT AS S5
*ON FKEY_1000044 = S5SID
ON FKEY_1000274 = S5SID
JOIN /BIC/D100004P AS DP
*ON FKEY_100004P = DPDIMID
ON FKEY_100027P = DPDIMID
WHERE
WHERE
( ( ( ( F~KEY_1000041 BETWEEN 20051230 AND 20060630 ) ) AND ( (
( ( ( ( F~KEY_1000271 BETWEEN 20051230 AND 20060630 ) ) AND ( (
         S3~MATERIAL = <l_0material> ) ) AND ( (
            s2~movetype BETWEEN '101' AND '102' OR
         s4~movetype BETWEEN '921' AND '922' OR
         s4~movetype BETWEEN '105' AND '106' OR
         s4~movetype BETWEEN '701' AND '701' OR
         s4~movetype BETWEEN '632' AND '632' ) ) AND ( (
         S5~PLANT = <l_0plant> ) ) AND ( (
         DP~SID_0RECORDTP = 0 ) ) ) )
GROUP BY
    ORDER BY F~KEY_1000271 DESCENDING.
      IF sy-subrc NE 0.
        EXIT.
      ENDIF.
    ENDSELECT.
How do I transport the code and make it work?
Whats the reason that the two key fields are different.
I had transported the aggregate from development to production. Activated it and filled the data.
What is the way out? Please help.
Regards,
Annie.

Hi Sonu,
The main task is to move the contents of the one internal table to another with some condition.
First sort and delete the duplicate entries from the First Internal table like below :
sort it_tab by material ascending date_modified descending.
delete adjacent duplicates from it_tab.
Then move that Internal table contents to another internal table.
Define another internal table with the same structure as you have first internal table and then
Second Step :
it_itab1 = it_itab.
If you are using seperate Header line and Body then you can do like below :
       it_itab1[] = it_itab[].
This will fix the issue.
Please let me know if you need any further explonation.
Regards,
Kittu
Edited by: Kittu on Apr 24, 2009 12:21 PM

Selecting random values from an array based on a condition

Hi All,
I have a small glitch here. hope you guys can help me out.
I have an evenly spaced integer array as X[ ] = {1,2,3, ....150}. and I need to create a new array which selects 5 random values from X [ ] , but with a condition that these random values should have a difference of atleast 25 between them.
for example res [ ] = {2,60,37,110,130}
res [ ] = {10,40,109,132,75}
I have been thinking of looping thru the X [ ], and selecting randomly but things look tricky once I sit down to write an algorithm to do it.
Can anyone think of an approach to do this, any help will be greatly appreciated ...

For your interest, here is my attempt.
import java.util.Random;
public class TestDemo {
    public static void main(String[] args) throws Exception {
        for (int n = 0; n < 10; n++) {
            System.out.println(toString(getValues(5, 25, 150)));
    private final static Random RAND = new Random();
    public static int[] getValues(int num, int spread, int max) {
        if (num * spread >= max) {
            throw new IllegalArgumentException("Cannot produce " + num + " spread " + spread + " less than or equals to " + max);
        int[] nums = new int[num];
        int max2 = max - (num - 1) * spread - 1;
        // generate random offsets totally less than max2
        for (int j = 0; j < num; j++) {
            int next = RAND.nextInt(max2);
            // favour smaller numbers.
            if (max2 > spread/2)
                next = RAND.nextInt(next+1);
            nums[j] = next;
            max2 -= next;
        // shuffle the offsets.
        for (int j = num; j > 1; j--) {
            swap(nums, j - 1, RAND.nextInt(j));
        // add the spread of 25 each.
        for (int j = 1; j < num; j++) {
            nums[j] += nums[j-1] + spread;
        return nums;
    private static void swap(int[] arr, int i, int j) {
        int tmp = arr;
arr[i] = arr[j];
arr[j] = tmp;
public static String toString(int[] nums) {
StringBuffer sb = new StringBuffer(nums.length * 4);
sb.append("[ ");
for (int j = 0; j < nums.length; j++) {
if (j > 0) {
sb.append(", ");
sb.append(nums[j]);
sb.append(" ]");
return sb.toString();

How to randomly select data from excel using labview.

A very good day to all. I am actually working on a system that will be selecting integer number from randomly generated set of number. If that wouldnt be possible, I would like the system to be able to select number from the set of numbers which have already been randomly generated from excel. kindly help me with the solution. To make myself clear, supposing I have set of numbers from 1 to 10, I want a labview setup that will be picking these numbers one after the other either with replacement or without from excel or self generated. I know this is possible in matlab but would prefer labview if possible. Thanks
Solved!
Go to Solution.

Most, if not all, of the languages I've run across have a rand() function that returns a random number between 0 and 1. Getting some other range is up to the programmer. Usual method is to multiply by the range you need and add an offset to adjust the mean. For instance if you need a random number between 200 and 300 the formula might look like " rand()*100+200 ". If you need an integer, you can use the round function (which will leave it as a float with no decimal pportion) or the conversion (to int). All of this is doable and straightforward in LabVIEW. Have a look: http://digital.ni.com/public.nsf/allkb/FCCDCD678EEF3A9186256D7B008054F5
If you feel more comfortable pulling from a file, try this: http://digital.ni.com/public.nsf/allkb/C944B961B59516208625755A005955F2

Selecting Randoms from Query of Queries

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