Random Record from a Query

I have a page on my site that displays certain information in
kind of a "feature" section, where it needs to query the database
based on certain criteria and then display the data for just one of
the records. The record should be different each time the page
loads. So, if my query has 10 or 20 records, I just want to select
one of them randomly and disply its data. What would be the best
way to code such a scenario?
Many thanks.

first, a statement that contains "The record
should be different each time the page loads" and "select one
of them
randomly and display its data" is a bit of a contradiction:
you either
display a random record or you control which record to
display to make
sure each page load displays a different one.
if you just want a random record displayed (which means same
record may
be displayed on subsequent page loads) then how to do it
depends on
which database you are using, as cfSearching pointed out.
here's a great place to look to sql statements for this for
various db
systems:
http://www.petefreitag.com/item/466.cfm
if you want to display a different record each page load, you
need to
keep track which records have already been displayed
previously and
display the next one in sequence. you could do this by
storing the list
of record ids in an application-scope variable, displaying
the record
with the first id and removing that id from the list of ids.
when the
list is empty, query the db for record ids again and make a
list anew.
hth
Azadi Saryev
Sabai-dee.com
http://www.sabai-dee.com/

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Hi
I a have a problem:
I have a query with many tables and 6 column(select a,b,c,d,e,f from x,y,z,t,s,g where conditions) and I use 3 parameters.
I create 3 parameters :datai,:dataf and :partener and a button with a trigger when button is pressed.
Then a create a manualy block with six field non-database a1,b1,c1,d1,e1,f1.
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loop
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end loop;
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Can somebody help me in this problem?
Thanks.
Edited by: 928437 on Oct 1, 2012 2:55 AM

Creating a view, and querying that into a database block is an excellent solution.
To use the non-database block:
You're missing the all-important Next_Record; command.
<pre> Begin
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Clear_Block(No_Validate);
open cursor X1;
loop
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end loop;
close X1;
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Help with selecting 10 random records from all records meeting report selection criteria in Crystal 11

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ADF UIX - Deleting records from expert-query view

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CM.

I came across the help topic in JDeveloper 'Making an Association into a Composition' that talks about modifying an association to trigger cascade-delete. Does this help ?
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SAP Query: How to filter records from SAP Query output before display

Hi Friends,
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Message was edited by:
        Bharat Reddy V

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*< Your code put in the List processing
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*>
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Regards,
A.Singh
Message was edited by:
        Amarjit Singh

How can I select random records from one column

How can I random select 400 records from a column contains more than 500,000 records? And how long will it take in oracle? Thanks.

here is one option: (just change 5 to suit your needs...)
SQL>select * from (
2 select object_name
3 from all_objects
4 order by dbms_random.random
5 ) where rownum < 5
6 /
OBJECT_NAME
UTL_SYS_COMPRESS
GV_$LOG_HISTORY
GV_$LOGMNR_LOGS
WWV_FLOW_THEME_7
SQL>/
OBJECT_NAME
WWV_FLOW_UPGRADE_REPORT
WRI$_ADV_SQLT_STATISTICS_PK
V_$DATABASE
GV_$SERVICEMETRIC
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WWV_FLOW_CREATE_FLOW_API
WRH$_SERVICE_WAIT_CLASS_BL
EXU8SNAPL
GV$SERVICEMETRIC_HISTORY
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Cheers,
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I have this Query which Leads me to two Rwos of Data
select papf.employee_number E_CODE
,to_char(paaf1.effective_start_date,'DD-MON-RRRR') EFFECTIVE_START_DATE
,DECODE(to_char(paaf1.effective_end_date,'DD-MON-RRRR'),'31-DEC-4712',NULL,to_char(paaf1.effective_end_date,'DD-MON-RRRR')) EFFECTIVE_END_DATE
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from apps.per_all_assignments_f paaf
,apps.per_all_people_f papf
,apps.per_grades pg
,apps.per_jobs pj
,apps.per_person_types ppt
,apps.per_person_type_usages_f pptuf
,apps.per_all_assignments_f paaf1
where 1=1
and papf.person_id = paaf.person_id
and pptuf.person_id = papf.person_id
and pptuf.person_type_id = ppt.person_type_id
and ppt.user_person_type = 'Employee'
and papf.current_employee_flag ='Y'
and paaf.primary_flag = 'Y'
and paaf1.primary_flag = 'Y'
and paaf1.grade_id = pg.grade_id
and paaf1.job_id = pj.job_id
and trunc(sysdate) between papf.effective_start_date and papf.effective_end_date
and trunc(sysdate) between pptuf.effective_start_date and pptuf.effective_end_date
and papf.person_id = paaf1.person_id
and (TRIM(UPPER(paaf1.ass_attribute24)) <> TRIM(UPPER(paaf.ass_attribute24))
OR TRIM(UPPER(paaf1.ass_attribute21)) <> TRIM(UPPER(paaf.ass_attribute21))
OR TRIM(UPPER(paaf1.ass_attribute22)) <> TRIM(UPPER(paaf.ass_attribute22))
OR TRIM(UPPER(paaf1.ass_attribute25)) <> TRIM(UPPER(paaf.ass_attribute25))
OR TRIM(UPPER(paaf1.ass_attribute23)) <> TRIM(UPPER(paaf.ass_attribute23))
OR paaf1.grade_id <> paaf.grade_id)
and paaf1.effective_end_date = paaf.effective_start_date - 1
and papf.employee_number in ('10620')
and paaf1.effective_start_date >= '01-JAN-1950'
---------------------------OUT PUT-----------------------------
E_CODE     EFFECTIVE_START_DATE     EFFECTIVE_END_DATE     PREVIOUS_CO
Row1 10620     17-SEP-2009     30-NOV-2009     CORPORATE
Row2 10620     19-NOV-2007     31-JAN-2008     CORPORATE
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i.e select ORIGINAL_DATE_OF_HIRE from per_all_people_f
where employee_number = '10620'
and rownum < 2
---------------------------OUT PUT----------------------------
15-MAY-2006
Is there is any approach to get this thing.
Thanks in advance
Bachan.
Edited by: Bachan on Sep 20, 2010 8:17 PM

maybe a union for your second row.
select E_CODE,
       EFFECTIVE_START_DATE,
       EFFECTIVE_END_DATE,
       PREVIOUS_CO
from (select rownum rn,
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               ,to_char(paaf1.effective_start_date,'DD-MON-RRRR') EFFECTIVE_START_DATE
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where rn = 1
union all
select employee_number E_CODE,
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       TRIM(SUBSTR(PAAF1.***_ATTRIBUTE21,INSTR(PAAF1.***_ATTRIBUTE21,'-')+1)) PREVIOUS_CO
from per_all_people_f
where employee_number = '10620'
   and rownum < 2note: untested

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Hello,
Im trying to get the top N records of a random query. I've been looking for a decent solution for a while now and the 2 solutions I've come across are:
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ORA-00907: missing right parenthesis
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ORA-00923: FROM keyword not found where expected
Apparently the construct used here isn't supported by my oracle version.
I'm using oracle Oracle8 Enterprise Edition Release 8.0.5.2.1.
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it must be nostalgy, but I would try something like
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      7876 ADAMS      CLERK           7788 1987-05-23_00:00:00       1100                    20
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      7782 CLARK      MANAGER         7839 1981-06-09_00:00:00       2450                    10
      7902 FORD       ANALYST         7566 1981-12-03_00:00:00       3000                    20
SQL> select * from (select * from emp order by ename) where rownum<6;
     EMPNO ENAME      JOB              MGR HIREDATE                   SAL       COMM     DEPTNO
      7876 ADAMS      CLERK           7788 1987-05-23_00:00:00       1100                    20
      7499 ALLEN      SALESMAN        7698 1981-02-20_00:00:00       1600        300         30
      7698 BLAKE      MANAGER         7839 1981-05-01_00:00:00       2850                    30
      7782 CLARK      MANAGER         7839 1981-06-09_00:00:00       2450                    10
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Laurent Schneider

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What I am trying to do is select random records from a table
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To start a new row after 3 records, do something like this.
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<tr>
<cfoutput query="something">
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</tr><tr>
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</tr>
</table>
You should also know that your approach is very inefficient
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First of all you are selecting every field from 3 tables when you
don't appear to be using all of them. Second, you are selecting
every record and you only want to use 3. There are better ways out
there, but they are db specific and you did not say what you are
using.

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Looks like this what you are looking for,
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thanks for replay shwetali,
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Faisal

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Hi guys,
Is there an easy way to display a random record from an XML
file? Current code:
HEAD
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</script>
BODY
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What i want to happen is when the page is loaded (and/or
reloaded) i want the {product_name} to randomly display any one of
my ten product names. I presume it requires use of {ds_RowID} and
some JavaScript, but am unsure of where to begin.
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nevermind people, i figured it out already. please close this topic.

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Can someone tell me how to display a random record from a database? I want to use it on my site to show a "review"... am able to do it in ASP but not sure how to in JSP.
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M

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you can put all object that you get it form DB in not
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