Dbms_random.value
SELECT value
into xxxx
FROM
( SELECT value FROM a
ORDER BY dbms_random.value )
WHERE rownum = 1;
When it picks value 123, how can code it to not pick value123 at least for a year?
Hi,
When it picks value 123, how can code it to not pick value123 at least for a year?You're asking for a random value, and yet you want it to be (albeit temporarily) unique ?
bells ringin'
That's an oxymoron ;-)
See:
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:831827028200
Similar Messages
-
Change format date TO_DATE(TRUNC(DBMS_RANDOM.VALUE...
Hi all...
I am trying dbms_random like this :
**Type data :
AAAA VARCHAR2(35)
BBBB VARCHAR2(6)
DDDD VARCHAR2(20)
E_DATE VARCHAR2(14)
**store procedur :
BEGIN
FOR X IN 0..3 LOOP
INSERT INTO TEST VALUES (
'AAAA--'|| dbms_random.string('X', 28),
'BBBB' || TO_CHAR (TRUNC(dbms_random.value(0,10))),
'CCCC--'|| dbms_random.string('X', 12),
TO_DATE(TRUNC(DBMS_RANDOM.VALUE(2455532,2455563+3)),'J')
END LOOP;
END;
Output :
AAAA BBBB DDDD E_DATE
AAAA--RTL2OWN8RVOMY1IUD93RP91RWOQA BBBB1 CCCC--JCWAXRO3TMP0 12-DEC-10
AAAA--629F3A4AIW5E4OHCDVFZ41SFB2U4 BBBB5 CCCC--DLAUZO511Y97 12-DEC-10
AAAA--XHKR95JISQRTRH54KNOQKDVUJ6QF BBBB6 CCCC--K7CHOT2KULNV 10-DEC-10
AAAA--7DRZ38SPRIN26HNA7VPQV9FKWCCQ BBBB7 CCCC--FXV3CCY3BWHY 09-DEC-10i want format E_DATE to DD-MM-YYYY without change type data and still use dbms_random...
Could you pls solve me out ?
Thank you
-newbie-pl/sql-Hi,
Sorry, I'm not sure I uderstand the problem.
Are you getting the date correctly, but you want to store it in a VARCHAR2 column? That's not a very good idea: dates belong in DATE columns, but if you ever want to convert a DATE into a string, use TO_CHAR:
TO_CHAR ( TO_DATE ( TRUNC ( DBMS_RANDOM.VALUE (2455532, 2455563+3)
, 'J'
, 'DD-MM-YYYY'
)or equivalently:
TO_CHAR ( DATE '2010-12-01' + dbms_random.value (0, 34)
, 'DD-MM-YYYY'
)Since you're not displaying the hours, minutes or seconds, there's no point in using TRUNC just to set them to 00:00:00.
Edited by: Frank Kulash on Feb 9, 2011 10:32 PM -
Please can anyone describe de DBMS_RANDOM.VALUE(p1, p2) parameters(p1, p2)?
can't random just generate single numbers like:Sure
SQL> r
1 select trunc(DBMS_RANDOM.VALUE(1,10))
2* from (select rownum from dual connect by rownum < 20)
TRUNC(DBMS_RANDOM.VALUE(1,10))
6
3
2
9
1
1
8
2
5
9
7
5
7
8
1
2
1
9
2
19 rows selected.
SQL> -
How to get top 11 values per date range
I want to get the top 11 values by date range.
Sample Data
CREATE TABLE SAMPLE_DATA
DOMAIN_NAME VARCHAR2(100),
QTD NUMBER,
LOAD_DATE DATE
-- Insert
BEGIN
FOR lc IN 1..20
LOOP
FOR ld IN 1..30
LOOP
INSERT
INTO SAMPLE_DATA VALUES
'DM_'
||lc,
round(dbms_random.value(0,1000)),
SYSDATE-ld
END LOOP;
END LOOP;
COMMIT;
END;
SELECT *
FROM
(SELECT DOMAIN_NAME,
QTD,
LOAD_DATE
FROM
(SELECT DOMAIN_NAME,
QTD,
LOAD_DATE
FROM SAMPLE_DATA
WHERE LOAD_DATE = TRUNC(SYSDATE-3)
ORDER BY QTD DESC
WHERE ROWNUM <=10
UNION ALL
SELECT 'Others' DOMAIN_NAME,
SUM(QTD) QTD,
LOAD_DATE
FROM
(SELECT DOMAIN_NAME,
QTD,
LOAD_DATE
FROM
(SELECT rownum rn,
DOMAIN_NAME,
QTD,
LOAD_DATE
FROM
(SELECT DOMAIN_NAME,
QTD,
LOAD_DATE
FROM SAMPLE_DATA
WHERE LOAD_DATE = TRUNC(SYSDATE-3)
ORDER BY QTD DESC
WHERE rn > 10
GROUP BY LOAD_DATE
ORDER BY QTD DESC
-- Result
DOMAIN_NAME QTD LOAD_DATE
Others 2888 24/03/13
DM_1 1000 24/03/13
DM_20 933 24/03/13
DM_11 913 24/03/13
DM_3 743 24/03/13
DM_13 572 24/03/13
DM_12 568 24/03/13
DM_9 564 24/03/13
DM_6 505 24/03/13
DM_5 504 24/03/13
DM_2 480 24/03/13
Please, Help me get in one query this result using a range of date.
e.g
using LOAD_DATE BETWEEN '24/03/13' AND '25/03/13'
DOMAIN_NAME QTD LOAD_DATE
Others 2888 24/03/13
DM_1 1000 24/03/13
DM_20 933 24/03/13
DM_11 913 24/03/13
DM_3 743 24/03/13
DM_13 572 24/03/13
DM_12 568 24/03/13
DM_9 564 24/03/13
DM_6 505 24/03/13
DM_5 504 24/03/13
DM_2 480 24/03/13
Others 1948 25/03/13
DM_1 807 25/03/13
DM_8 764 25/03/13
DM_7 761 25/03/13
DM_11 656 25/03/13
DM_18 611 25/03/13
DM_17 523 25/03/13
DM_14 467 25/03/13
DM_19 447 25/03/13
DM_15 437 25/03/13
DM_6 380 25/03/13 Thank you in advance.I got the solution. Just sharing.
I used analytic functions that make my job easy.
Sample Data
DOMAIN_NAME QTD LOAD_DATE
DM_1 807 25/03/2013
DM_1 1000 24/03/2013
DM_2 226 25/03/2013
DM_2 480 24/03/2013
DM_3 244 25/03/2013
DM_3 743 24/03/2013
DM_4 48 25/03/2013
DM_4 413 24/03/2013
DM_5 164 25/03/2013
DM_5 504 24/03/2013
DM_6 380 25/03/2013
DM_6 505 24/03/2013
DM_7 761 25/03/2013
DM_7 212 24/03/2013
DM_8 764 25/03/2013
DM_8 308 24/03/2013
DM_9 354 25/03/2013
DM_9 564 24/03/2013
DM_10 214 25/03/2013
DM_10 367 24/03/2013
DM_11 656 25/03/2013
DM_11 913 24/03/2013
DM_12 37 25/03/2013
DM_12 568 24/03/2013
DM_13 332 25/03/2013
DM_13 572 24/03/2013
DM_14 467 25/03/2013
DM_14 87 24/03/2013
DM_15 437 25/03/2013
DM_15 450 24/03/2013
DM_16 238 25/03/2013
DM_16 299 24/03/2013
DM_17 523 25/03/2013
DM_17 143 24/03/2013
DM_18 611 25/03/2013
DM_18 145 24/03/2013
DM_19 447 25/03/2013
DM_19 464 24/03/2013
DM_20 91 25/03/2013
DM_20 933 24/03/2013 Top 11 QTD of DOMAIN_NAME per Data Range.
SELECT *
FROM
(SELECT DOMAIN_NAME,
QTD,
LOAD_DATE
FROM
(SELECT LOAD_DATE,
DOMAIN_NAME ,
QTD,
(DENSE_RANK() OVER (PARTITION BY LOAD_DATE ORDER BY QTD DESC )) AS RANK_QTD
FROM SAMPLE_DATA
WHERE trunc(load_date) BETWEEN '24/03/2013' AND '25/03/2013'
WHERE RANK_QTD <= 10
UNION ALL
SELECT 'Others',
SUM(QTD) AS QTD,
LOAD_DATE
FROM
(SELECT LOAD_DATE,
DOMAIN_NAME ,
QTD,
(DENSE_RANK() OVER (PARTITION BY LOAD_DATE ORDER BY QTD DESC )) AS RANK_QTD
FROM SAMPLE_DATA
WHERE trunc(load_date) BETWEEN '24/03/2013' AND '25/03/2013'
WHERE RANK_QTD > 10
GROUP BY LOAD_DATE
ORDER BY LOAD_DATE ASC,
QTD DESC
DOMAIN_NAME QTD LOAD_DATE
Others 2888 24/03/2013
DM_1 1000 24/03/2013
DM_20 933 24/03/2013
DM_11 913 24/03/2013
DM_3 743 24/03/2013
DM_13 572 24/03/2013
DM_12 568 24/03/2013
DM_9 564 24/03/2013
DM_6 505 24/03/2013
DM_5 504 24/03/2013
DM_2 480 24/03/2013
Others 1948 25/03/2013
DM_1 807 25/03/2013
DM_8 764 25/03/2013
DM_7 761 25/03/2013
DM_11 656 25/03/2013
DM_18 611 25/03/2013
DM_17 523 25/03/2013
DM_14 467 25/03/2013
DM_19 447 25/03/2013
DM_15 437 25/03/2013
DM_6 380 25/03/2013 -
Display a column with a list of values from DUAL;
Hello, how can I display something like:
COL1
A
B
C
D
E
FOn my planet these are 'words' ;) :
SQL> select dbms_random.string('a', level)
2 from dual
3 connect by level <= 10;
DBMS_RANDOM.STRING('A',LEVEL)
r
BB
pmE
bHri
aZZDC
FzOZBf
fXfPyIP
LOqrQbnK
AYzNgHcGc
lvxRvflHXj
10 rows selected.
SQL> select dbms_random.string('a', dbms_random.value(10, 50))
2 from dual
3 connect by level <= 10;
DBMS_RANDOM.STRING('A',DBMS_RANDOM.VALUE(10,50))
AKExSSzIJOkabCT
VCHHRTcgtnBSlZyRmsITqzWqVNgDnPdnxmt
qLnuyGQErxZvHttRBpWrPoLEiGUra
rcllLkyZXiwvlcGaUoEAeMbEdZSHlZBIgdilgGTQzxlIUW
ftnGzDCzUBEsxKzhDLfgS
aqUmpIzjqkWMZGpbAchhbiqFBUKdRaDwFAgdP
nskqNdzmlAKlsGOJpbKfQHiCfvkDpoFcTkTvKaUcGLFDkgjsX
fwkxBSoVuDSEOFldgDhilvm
iAnSvDMQzamGvIFNydfjhr
lHRPUnKgOxYQwWAltdELJNqqfgMRSmbBpSDnjOsfx
10 rows selected.http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_random.htm#CDEJAHCB -
Error while inserting data using DBMS_RANDOM
Hi ,
I tried the following insert command in the link http://www.oracle-base.com/articles/misc/RollupCubeGroupingFunctionsAndGroupingSets.php
BANNER
Oracle Database 10g Release 10.2.0.1.0 - Production
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
SQL> INSERT INTO dimension_tab
2 SELECT TRUNC(DBMS_RANDOM.value(low => 1, high => 3)) AS fact_1_id,
3 TRUNC(DBMS_RANDOM.value(low => 1, high => 6)) AS fact_2_id,
4 TRUNC(DBMS_RANDOM.value(low => 1, high => 11)) AS fact_3_id,
5 TRUNC(DBMS_RANDOM.value(low => 1, high => 11)) AS fact_4_id,
6 ROUND(DBMS_RANDOM.value(low => 1, high => 100), 2) AS sales_value
7 FROM dual
8 CONNECT BY level <= 1000;
SELECT TRUNC(DBMS_RANDOM.value(low => 1, high => 3)) AS fact_1_id,
ERROR at line 2:
ORA-00907: missing right parenthesisCould you please advice me to get the correct recordssmile wrote:
Hi ,
I tried the following insert command in the link http://www.oracle-base.com/articles/misc/RollupCubeGroupingFunctionsAndGroupingSets.php
BANNER
Oracle Database 10g Release 10.2.0.1.0 - Production
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
SQL> INSERT INTO dimension_tab
2 SELECT TRUNC(DBMS_RANDOM.value(low => 1, high => 3)) AS fact_1_id,
3 TRUNC(DBMS_RANDOM.value(low => 1, high => 6)) AS fact_2_id,
4 TRUNC(DBMS_RANDOM.value(low => 1, high => 11)) AS fact_3_id,
5 TRUNC(DBMS_RANDOM.value(low => 1, high => 11)) AS fact_4_id,
6 ROUND(DBMS_RANDOM.value(low => 1, high => 100), 2) AS sales_value
7 FROM dual
8 CONNECT BY level <= 1000;
SELECT TRUNC(DBMS_RANDOM.value(low => 1, high => 3)) AS fact_1_id,
ERROR at line 2:
ORA-00907: missing right parenthesisCould you please advice me to get the correct recordsYou can't used named parameters for function/procedure calls in SQL until version 11.
You'll have to remove the
low => And stick with the good old "positional" way of doing things. -
hallo,
i would like to know how DBMS_RANDOM package can be implemented.
can you please explain with example.
is there any other means of performimg random sampling?
thank you
regards,
raoHi
Desc DBMS_RANDOM;
PROCEDURE INITIALIZE
Názov argumentu Typ In/Out predvolene?
VAL BINARY_INTEGER IN
FUNCTION NORMAL RETURNS NUMBER
FUNCTION RANDOM RETURNS BINARY_INTEGER
PROCEDURE SEED
Názov argumentu Typ In/Out predvolene?
VAL BINARY_INTEGER IN
PROCEDURE SEED
Názov argumentu Typ In/Out predvolene?
VAL VARCHAR2 IN
FUNCTION STRING RETURNS VARCHAR2
Názov argumentu Typ In/Out predvolene?
OPT CHAR IN
LEN NUMBER IN
PROCEDURE TERMINATE
FUNCTION VALUE RETURNS NUMBER
FUNCTION VALUE RETURNS NUMBER
Názov argumentu Typ In/Out predvolene?
LOW NUMBER IN
HIGH NUMBER IN
Example in SQL+:
Exec DBMS_RANDOM.INITIALIZE(100);
SELECT DBMS_RANDOM.Normal
, DBMS_RANDOM.RANDOM
, DBMS_RANDOM.VALUE()
, DBMS_RANDOM.VALUE(10,100)
FROM DUAL;
milos -
Hi Experts,
Need some help in writing a query.
Table 'Tab_2' has column 'c3' which checks for its value from 'tab_1' column 'c1' values, and accordingly fetches value from column 'c2'.
But if a value from c3 is not present in tab_1 column 'c1', it should default 'c2' value as 'dx'.
Please find below the Create & Insert scripts:
create table tab_1(
c1 varchar2(200Char),
c2 varchar2(200Char)
create table tab_2(
c3 varchar2(200Char),
c4 varchar2(200Char)
insert into tab_1 values('104,113,146,165','1x');
insert into tab_1 values('204,213,246,265','2x');
insert into tab_1 values('304,313,346,365','3x');
insert into tab_1 values('default','dx');
commit;
insert into tab_2 values('146',null);
insert into tab_2 values('265',null);
insert into tab_2 values('333',null);
commit;Here's query where I'm stuck:
SQL> with x1 as
2 (
3 select
4 REGEXP_SUBSTR(c1,'[^,]+',1,level) id1,
5 c2
6 from tab_1
7 connect by level <= length(translate(c1,'~0123456789','~'))+1
8 and prior c1 = c1
9 and prior sys_guid() is not null
10 and c1 != 'default'
11 )
12 select
13 id1, c2, c3
14 from x1 RIGHT OUTER JOIN tab_2
15 on (x1.id1 = tab_2.c3);
ID1 C2 C3
146 1x 146
265 2x 265
333Please let me know if any further clarification is needed.
- RanitThe data model looks flawed. So not sure the following solution will satisfy all the issues with respect to your problem.
with t
as
select regexp_substr(c1, '[^,]+', 1, level) c1
, c2
from tab_1
connect
by level <= length(c1) - length(replace(c1, ',')) + 1
and c1 = prior c1
and prior dbms_random.value() is not null
select t1.c3, t2.c1, nvl2(t2.c1, t2.c2, (select c2 from tab_1 where c1 = 'default')) c2
from tab_2 t1
left join t t2
on t1.c3 = t2.c1;Edited by: Karthick_Arp on May 22, 2013 12:39 AM
Changed NVL to NVL2 -
DBMS_RANDOM and ORA-01436: CONNECT BY loop in user data
Hi,
The following query gets the error "ORA_01436: CONNECT BY loop in user data":
SELECT currentdate
, ADD_MONTHS ( currentdate
, (LEVEL - 1) * months
) + ((LEVEL - 1) * days) AS final_date
, level
FROM table_z
WHERE CONNECT_BY_ISLEAF = 1
CONNECT BY currentdate = PRIOR currentdate
AND PRIOR dbms_random.value IS NOT NULL
AND ADD_MONTHS ( currentdate
, (LEVEL - 2) * months
) + ((LEVEL - 2) * days) <= TO_DATE ( '05/01/2008'
, 'MM/DD/YYYY'
);I've seen "PRIOR dbms_random.value IS NOT NULL" used like this as as a way to get around ORA-01436 in Oracle 9, but I'm using Oracle 11, and it doesn't work
currentdate is unique.
If I hard-code any one set of values, like this:
DEFINE currentdate = "TO_DATE ('03/02/2006', 'MM/DD/YYYY')"
DEFINE days = 300
DEFINE months = 0
SELECT ¤tdate
, ADD_MONTHS ( ¤tdate
, (LEVEL - 1) * &months
) + ((LEVEL - 1) * &days) AS final_date
FROM dual
WHERE CONNECT_BY_ISLEAF = 1
CONNECT BY ¤tdate = PRIOR ¤tdate
AND PRIOR dbms_random.value IS NOT NULL
AND ADD_MONTHS ( ¤tdate
, (LEVEL - 2) * &months
) + ((LEVEL - 2) * &days) <= TO_DATE ( '05/01/2008'
, 'MM/DD/YYYY'
);I can get the correct results from dual. I was looking for a way to extend this to get multiple rows from table_z in the same query.
The problem came up in [this thread|http://forums.oracle.com/forums/thread.jspa?threadID=894946&tstart=0], where the problem is:
Given this table:
CREATE TABLE table_z
( currentdate DATE
, months NUMBER
, days NUMBER
INSERT INTO table_z (currentdate, months, days) VALUES (TO_DATE ('03/02/2006', 'MM/DD/YYYY'), 0, 300);
INSERT INTO table_z (currentdate, months, days) VALUES (TO_DATE ('04/05/2006', 'MM/DD/YYYY'), 10, 0);
INSERT INTO table_z (currentdate, months, days) VALUES (TO_DATE ('05/04/2006', 'MM/DD/YYYY'), 3, 0);I'm trying to add the given number of months and/or days to currentdate until I reach a given hard-coded cutoff date (05/01/2008 in this case).
That is, the desired results from the data above are:
CURRENTDAT MONTHS DAYS FINALDATE
03/02/2006 0 300 08/18/2008
04/05/2006 10 0 10/05/2008
05/04/2006 3 0 05/04/2008Edited by: Frank Kulash on May 4, 2009 7:38 PM
Typo in CONNECT BY conditions fixed.Hi Frank,
Sounds like a bug. Funny enough, but this works:
SQL> select * from v$version where rownum = 1
2 /
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Prod
SQL> SELECT currentdate
2 , ADD_MONTHS ( currentdate
3 , (LEVEL - 1) * months
4 ) + ((LEVEL - 1) * days) AS final_date
5 , level
6 FROM table_z
7 WHERE CONNECT_BY_ISLEAF = 1
8 CONNECT BY currentdate = PRIOR currentdate
9 AND PRIOR dbms_random.value IS NOT NULL
10 AND ADD_MONTHS ( currentdate
11 , (LEVEL - 1) * months
12 ) + ((LEVEL - 1) * days) <= TO_DATE ( '05/01/2008'
13 , 'MM/DD/YYYY'
14 );
FROM table_z
ERROR at line 6:
ORA-01436: CONNECT BY loop in user data
SQL>
SQL> ed
Wrote file afiedt.buf
1 SELECT currentdate
2 , ADD_MONTHS ( currentdate
3 , (LEVEL - 1) * months
4 ) + ((LEVEL - 1) * days) AS final_date
5 , level
6 FROM table_z
7 WHERE CONNECT_BY_ISLEAF = 1
8 CONNECT BY currentdate = PRIOR currentdate + 0
9 AND PRIOR dbms_random.value IS NOT NULL
10 AND ADD_MONTHS ( currentdate
11 , (LEVEL - 1) * months
12 ) + ((LEVEL - 1) * days) <= TO_DATE ( '05/01/2008'
13 , 'MM/DD/YYYY'
14* )
SQL> /
CURRENTDA FINAL_DAT LEVEL
02-MAR-06 23-OCT-07 3
05-APR-06 05-DEC-07 3
04-MAY-06 04-FEB-08 8
SQL> SY. -
How to use dbms_random in TimesTen
Hi, All,
dbms_random is the supplied procedure in TimesTen 11.2.1,
but I failed with the following select statement:
select dbms_random.value from dual; or select sys.dbms_random.value from dual
the error I got is "1024: Referenced table DBMS_RANDOM not in FROM list"
But all of the query is OK for OracleDB.
How can I use dbms_random in TimesTen?
Thanks
Edited by: user536764 on 2011-1-5 上午8:24In pl/sql work fine
declare
v number;
begin
v := dbms_random.value(1,100);
dbms_output.put_line(v);
end;
85.95011054036622138729731389231348690891 -
Flatten a Key Value Pair...how many joins are too many?
Hello,
So, a product can have many attributes...things that describe the product. In our 3rd party ERP, these are stored in a key-value manner.
product_code
attribute_code
attribute_value
etc.
Now, for some products there are 150+ attributes....you can pretty much guess where this is going...
User wants a report that shows an product_code and it's attributes on a single line (in separate columns) for Excel manipulation(s).
So, the SQL would require joining the same attribute table as many times as there are distinct attribute_codes for a given product_code.
If there are 150 named/distinct attributes that need to be lined up, this would mean 150 joins on that one table.
OR write scalars for each attribute
OR write a function that fetches the attribute_value when you pass the product_code and attribute_code and call this function 150 times in the SQL select list.
Yes, I know, I should benchmark each approach and select the one that works best....BUT, I would like to poll the wisdom of outstanding individuals on this group to see which of the 3 approaches would be preferred.
Oh and the users typically "query" hundreds to thousands of products and want this result set.
We are still on the terminally supported Oracle 10g database on Linux.
Thanks,
ManishMarc mentioned it already
with
eav as
(select 1 + mod(level,trunc(dbms_random.value(5,20))) product_code,
trunc(dbms_random.value(1,500)) attribute_code,
dbms_random.string('u',dbms_random.value(1,10)) attribute_value
from dual
connect by level <= 50
select csv
from (select product_code,
'name' att_type,
product_code||',attribute codes,'||listagg(to_char(attribute_code),',') within group (order by attribute_code) csv
from eav
group by product_code
union all
select product_code,
'value' att_type,
product_code||',attribute values,'||listagg(to_char(attribute_value),',') within group (order by attribute_code)
from eav
group by product_code
order by product_code,att_type
CSV
1,attribute codes,13,299,476
1,attribute values,LOCO,FKEKQ,UQHBYITKZ
2,attribute codes,66,72,121,126,198,307,346
2,attribute values,DJBBK,FVBYYBPQ,LCHQ,BCFYN,ZP,UYWDSGFEJ,CZ
3,attribute codes,32,101,213,352,369,449,499
3,attribute values,XKYBDRKPY,RZBU,RWQN,FVCQKWL,N,HCYTLHN,HCHXQLSU
4,attribute codes,116,210,244,307
4,attribute values,FKCMZCIJ,BAWZV,RCTDQLRE,CF
5,attribute codes,89,144,283,293,389
5,attribute values,YK,CEEAEFX,JEEZLJ,XESPFSWN,TRNYF
6,attribute codes,183,435,449
6,attribute values,CZYGEDPH,QEN,HO
7,attribute codes,282,333,358,373
7,attribute values,GRIY,ZCS,FGFQKEPQ,VITJKBNU
8,attribute codes,180,195,374
8,attribute values,UJPNIOGYS,GNWXLMB,XSFHO
9,attribute codes,30,103,216,485
9,attribute values,FJB,VXQHBYIX,RNZGRDBK,I
10,attribute codes,234
10,attribute values,VKCDNJ
11,attribute codes,27
11,attribute values,QDQHQHGD
12,attribute codes,51,101,223,333
12,attribute values,UMJXWTRLCI,XHSPFNFAX,FNFDEBGAYI,INBNTICY
13,attribute codes,298
13,attribute values,RQOS
14,attribute codes,270,480
14,attribute values,TMWSSNZNXT,PRLODAMEJ
16,attribute codes,297
16,attribute values,CITFASX
Regards
Etbin -
I would like to return a number between 0-9999 through the dbms_random function. I am trying this:
exec dbms_random.initialize(1234);
select dbms_random.random from dual;
RANDOM
-3.10E+08
this is not what I am looking for. Anyone know how I can get the desired results I am looking for?SQL> SELECT DBMS_RANDOM.Value(0,9999) FROM dual;
DBMS_RANDOM.VALUE(0,9999)
2499.13527
SQL> /
DBMS_RANDOM.VALUE(0,9999)
6274.76354TTFN
John -
Inheriting the values in tree structure
In the below graph if P1 value is 10 then all node value should be 10.
But at any level of node we can change the value of node for example
If I override P6 with value 20 then p6, p7, p8 values should be 20 and remainings with 10
P1 10
P2 P3 10
30 P4 P5 10
P6 20
P7 P8 20
Expecting output :
P1 10
P2 10
P3 10
P4 30
p5 10
p6 20
p7 20
p8 20
am having a table which stores this hierarchies
Table : create table Prod_Hierarchy
( child_node varchar2(10) ,parent_node varchar2(10))
With values
Child_node, Parent_node
P1
P2 P1
P3 P1
P4 P2
p5 p2
p6 p5
p7 p6
p8 p6
And below table is to override the values from inheritence
create table Prod_value ( node varchar2(10), node_val number(10))
values:
P1 10
p4 30
P6 20What about this solution.
Processing ...
create table members (
id number,
value number,
change_id number
Processing ...
create sequence change_id start with 1 increment by 1 nocache
Processing ...
create or replace trigger register_modification
before insert or update on members for each row
begin
select change_id.nextval
into :new.change_id
from dual;
end;
TRIGGER REGISTER_MODIFICATION compiled successfully
Processing ...
insert into members (id,value) (
select rownum id, trunc(dbms_random.value(1,5)) * 10 as value
from dual
connect by rownum <= 15
15 row(s) inserted
Processing ...
create table relations as
select rownum id,decode(rownum,1,null,trunc(dbms_random.value(1,rownum))) parent
from dual
connect by rownum <= 15
Processing ...
select parent,id,value
from members join relations using (id)
Query finished, retrieving results...
PARENT ID VALUE
1 40
1 2 40
2 3 20
3 4 10
1 5 20
2 6 10
6 7 30
5 8 30
1 9 30
5 10 30
5 11 20
7 12 10
9 13 20
9 14 20
3 15 40
15 row(s) retrieved
Processing ...
select parent,id,value
from members join relations using (id)
model
reference get_parent on (
select parent,id
from relations
dimension by (id)
measures (parent as p) ignore nav
main result
dimension by (id,parent)
measures (value,change_id,change_id as vtg)
rules automatic order (
vtg[any,any] = case
when vtg[cv(parent),p[cv(parent)]] > vtg[cv(),cv()] then
vtg[cv(parent),p[cv(parent)]]
else
vtg[cv(),cv()]
end,
value[any,any] = case
when vtg[cv(),cv()] > change_id[cv(),cv()] then
value[cv(parent),p[cv(parent)]]
else
value[cv(),cv()]
end
Query finished, retrieving results...
PARENT ID VALUE
1 40
1 2 40
2 3 20
3 4 10
1 5 20
2 6 10
6 7 30
5 8 30
1 9 30
5 10 30
5 11 20
7 12 10
9 13 20
9 14 20
3 15 40
15 row(s) retrieved
Processing ...
update members
set value = 15
where id = 2
1 row(s) updated
Processing ...
select parent,id,value
from members join relations using (id)
model
reference get_parent on (
select parent,id
from relations
dimension by (id)
measures (parent as p) ignore nav
main result
dimension by (id,parent)
measures (value,change_id,change_id as vtg)
rules automatic order (
vtg[any,any] = case
when vtg[cv(parent),p[cv(parent)]] > vtg[cv(),cv()] then
vtg[cv(parent),p[cv(parent)]]
else
vtg[cv(),cv()]
end,
value[any,any] = case
when vtg[cv(),cv()] > change_id[cv(),cv()] then
value[cv(parent),p[cv(parent)]]
else
value[cv(),cv()]
end
Query finished, retrieving results...
PARENT ID VALUE
1 40
1 2 15
2 3 15
3 4 15
1 5 20
2 6 15
6 7 15
5 8 30
1 9 30
5 10 30
5 11 20
7 12 15
9 13 20
9 14 20
3 15 15
15 row(s) retrievedOn the table reporting values of nodes there is a number that tells in with order the value of node has been updated.
Then with the model query latest changes are inherieted by child nodes.
Bye Alessandro -
Weighted random value (1-10) e.g.3 will be 50 % of records
Hello,
i need to generate random values into my table. For the simplification, lets say that i need to generate values in range from 1 to 10. For this there is a lot of ways.
e.g. UPDATE test_number SET random_value = round (dbms_random.value (1,10))
But what I need is something like weighted random values. I need random values to be inserted into column, but I need e.g. 3 to be inserted more times than other values e.g. if i have 100 rows i want to have 3 in 50 random rows
Do you have any idea how to achieve it?
Thanks a lot for any help or reply !Hi,
You can do something like this:
WITH got_p_num AS
SELECT LEVEL AS id
, FLOOR (dbms_random.value (1, 19)) AS p_num
FROM dual
CONNECT BY LEVEL <= 10
SELECT id
, p_num
, CASE
WHEN p_num < 3 THEN p_num
WHEN p_num < 12 THEN 3
ELSE p_num - 8
END AS r_num
FROM got_p_num
ORDER BY r_num
;If you want the number 3 to appear on half of the rows; that means that, out of 18 random numbers, you expect 3 to occur 9 times, and the other numbers to appear once each. The query above generates random integers in the range 1 through 18 inclusive, and calls this number p_num. The CASE statement maps p_num to what you really want, a n integer between 1 and 10, with 3 occurring 9/18 (= 1/2) of the time.
Instead of using a CASE expression, you might want to create a table, that has one row for every number that can be in the output, and the probability of picking that number. You could then join to that table to convert the raw random number to the id that you want.
Edited by: Frank Kulash on Oct 6, 2011 3:36 PM -
Hi,
I got one suituation to calculate the percentage and based on that i have to do an insertion into tableA and tableB.
4 types of roles are there role1, role2, role3, role4 .
role1 80%
role2 70%
role3 30%
role4 10%
I have to generate random number, if the role -> role1 random number is 55 and its entered into tableA . next time role2 user is entered
and the random number is 20 and its entered into TableB.... But now my question is i have to use 4 random numbers .
is it possible to use in oracle procedure. i should not use any temp tables ... is there any other solutions are there ?
Regards,
KBGHaven't you read my last piece of code?
declare
rand_num_1 number := trunc(dbms_random.value(0,100));
rand_num_2 number := trunc(dbms_random.value(0,100));
rand_num_3 number := trunc(dbms_random.value(0,100));
rand_num_4 number := trunc(dbms_random.value(0,100));
begin
-- do what you want with the 4 random numbers...
end;
SQL> declare
2 rand_num_1 number := trunc(dbms_random.value(0,100));
3 rand_num_2 number := trunc(dbms_random.value(0,100));
4 rand_num_3 number := trunc(dbms_random.value(0,100));
5 rand_num_4 number := trunc(dbms_random.value(0,100));
6 begin
7 dbms_output.put_line('Rand1 ='||rand_num_1);
8 dbms_output.put_line('Rand2 ='||rand_num_2);
9 dbms_output.put_line('Rand3 ='||rand_num_3);
10 dbms_output.put_line('Rand4 ='||rand_num_4);
11 end;
12 /
Rand1 =2
Rand2 =55
Rand3 =58
Rand4 =99Max
[My Italian Oracle blog|http://oracleitalia.wordpress.com/2010/01/10/crittografia-in-plsql-utilizzando-dbms_crypto/]
Edited by: Massimo Ruocchio on Jan 12, 2010 12:40 PM
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