Avoiding Cartesian Products

Hi All
I have an SQL query that is taking a long time to run or will crash due the structure.
I'm querying 20 fields that are sourced from 4 tables.
Usng SQL developer, I'm given the info that the query creates 3 or 4 cartesian products.
The basic structure is as follows, EXAMPLE ONLY;
SELECT CUSTOMERS, PLACE, VALUE, DDATE, PHONE_NUMBER
FROM CUSTOMERS C, PLACE P, VALUE V, DDATE D, PHONE DETAILS N
WHERE C.ADDRESS = P.ADDRESS
AND D.DATE BETWEEN TO_DATE ('08/06/09' , 'DD/MM/YY')
AND TO_DATE ('10/06/09' , 'DD/MM/YY')
OR N.PHONE_DETAILS = C.PHONE_NUMBER
I need to rewrite this to run more quickly & may have to completely change the query structure.
If anyone has had the same issue & a fix I'd appreciate it. Thanks

Hi Sanjay
here's the query
SELECT DISTINCT DECODE(SOURCE_SYSTEM, 'S', CONCAT('SR ', SR_NUMBER), SR_NUMBER) AS S.SR_NUMBER, S.SOURCE_SYSTEM, S.SR_AREA, S.SR_SUB_AREA, S.SR_STATUS, S.SR_SUB_STATUS, S.SR_CLOSED_DATE, S.SR_PRODUCT1, S.SR_PRODUCT2,S.SR_OWNER, S.SR_SERVICE_ID, S.SR_REASON1, S.SR_REASON2, S.SR_TIO_PRIORITY, S.SR_REF_NUMBER, S.SR_REF_NUMBER_TYPE, S.SR_DATE_RECD, S.SR_CIDN, S.SR_BUS_UNIT, S.SR_MBM_SEG, S.SR_BILL_ACCT_NUMBER, S.LATEST_UPDATE, C.BEFORE_CLEANSING, C.AFTER_CLEANSING, P.DEALING, P.SERVICE_ID, P.PDATE, P.DISPUTED_AMOUNT, P.ISSUE_1, P.ISSUE_2, P.ISSUE_3
FROM SR_MERGED_DATA S, PL2_WE_050609 P, CLEANSED_TIO_REF_IDS C, PL2_UNLOC_090609 L
WHERE S.SR_AREA = 'Issues'
AND (L.PSR_NUMBER = S.SR_NUMBER)
OR (P.SERVICE_ID = S.SR_SERVICE_ID
AND SR_DATE_RECD BETWEEN TO_DATE('01/05/09','DD/MM/YY')
AND TO_DATE('09/06/09', 'DD/MM/YY'))
I think you may have answered my question.
Should I try the same syntax as you have written it instead?

Similar Messages

Want to avoid cartesian Product but cannot avoid it some how.

Hi,
I am using oracle 10G .
trying to draft a query which is resulting in absurd results.
select i.corr_acc_no, sum(amtsign.amount_6) from item i,
(select corr_Acc_no,flag_2,decode(fund_code,'C',amount_6,amount_6*-1) amount_6 from item
where corr_AcC_no in (select corr_acc_no from bank where local_Acc_no in ('MBL-SEG-NZD'))and flag_2=0) AmtSign
where i.corr_acc_no=amtsign.corr_acc_no
and i.flag_2=0
group by i.corr_acc_no
Basically the inner query, which i am using as the second table in the join, gives 13 results. I want to sum the amount_6 field in main select clause which I want to get from results of
(select corr_Acc_no,flag_2,decode(fund_code,'C',amount_6,amount_6*-1) amount_6 from item
where corr_AcC_no in (select corr_acc_no from bank where local_Acc_no in ('MBL-SEG-NZD'))and flag_2=0)
The sum took too much time so i drafted simple query to check how many rows are returned by removing sum and i noticed it gives a Cartesian product with 169 rows instead of just 13. I have 2 join conditions but the value for corr_Acc_no is same for all 13 rows, i can't use amount_6 as join becuase i am changing it's sign in the inner query. Please advise.

Thanks to both of you. @LakmalRajapakse your answer is bang on right. I did the same way after I posted this. I realized there's no point joining item with itself when I can get it done in single query. It's just that I was having hard time with 'Case' in select to get whatever I want,so I tried this logic. But then gave a try to decode, it worked. Thanks anyways.

How Cartesian products affects Sybase IQ performance?

In my IQ message log, I have the following message:
I. 04/21 08:28:22. 0001847919 Exception Thrown from dfo_Root.cxx:822, Err# 0, tid 8 origtid 8
I. 04/21 08:28:22. 0001847919 O/S Err#: 0, ErrID: 9216 (df_Exception); SQLCode: -1005015, SQLState: 'QTA15', Severity: 14
I. 04/21 08:28:22. 0001847919 [20169]: The optimizer was unable to find a query plan that avoided cartesian product joins larger than the Max_Cartesian_Result setting
-- (dfo_Root.cxx 822)
I don´t know if
this situation may affect the overall performance
Thank you

Hi Jairo,
As Cartesian product (no join conditions) selects large number of rows, it requires more exec time, temp space (if order by, group by, etc,..) , temp cache, main cache, threads.
To get close estimations about query resources consumtion, you can generate plans without execution using option NoExec.
Query plan option recommended are : quary_name, query_plan, query_detail, query_plan_as_html, query_plan_as_html_directory, dml_options10.
See Generating Query Plans
Note that other resource monitoring options can be enabled/used , but they require effectivel query exection. The info are collected once execution is finished with success. Eg. query_plan_after_run and query_timing.
Regards,
Tayeb.

Cartesian Product from in-line queries

I have the following query:
SELECT AUDIT_MONTH, AUDITS, DEFECTS
FROM
select distinct(to_char(AUDIT_DATE,'MM/YY')) as AUDIT_MONTH
from v_safety_audit_records
select count(distinct(AUDIT_ID)) AUDITS
from v_safety_audit_records
group by to_char(AUDIT_DATE,'MM/YY')
select count(KEY_ID) DEFECTS
from v_safety_audit_records
where SUBAREA_ID NOT LIKE '_98'
and SUBAREA_ID NOT LIKE '_99'
group by to_char(AUDIT_DATE,'MM/YY')
but it keeps giving me a cartesian product. Is there a way to re-write this so that I only get the month, the number of audits, and number of defects on a line rather than number of months x number of months worth of lines? I can't seem to get the join conditions worked out... I can re-write this all using views, but as it is for a single report, I'd rather not bother with more views if I can avoid it.
Thanks in advance.

The problem is that the query doesn't return a single row and isn't meant to. I tried:
SELECT
select distinct(to_char(AUDIT_DATE,'MM/YY'))
from v_safety_audit_records
group by to_char(AUDIT_DATE,'MM/YY')
) AUDIT_MONTH,
select count(distinct(AUDIT_ID))
from v_safety_audit_records
group by to_char(AUDIT_DATE,'MM/YY')
) AUDITS,
select count(KEY_ID)
from v_safety_audit_records
where SUBAREA_ID NOT LIKE '_98'
and SUBAREA_ID NOT LIKE '_99'
group by to_char(AUDIT_DATE,'MM/YY')
) DEFECTS
FROM DUAL;
and got "ORA-01427: single-row subquery returns more than one row". It would be a good idea if I only needed it for one month, however.

Cartesian Product in Select

    Hi all!
I need help.
I have this function that launches a Select. My Oracle Grid tells me, when I tune the Select of this function, that there is a Cartesian Product. I understand what a Cartesian Product is, but I fail to find it. Can you help me by pointing out WHERE is the misteke? Thank you!!
P.s. Oracle EE 10.2.0.4 on windows Server 2003 R2 SP2 64Bit
[code]
create or replace
FUNCTION          "ANA_GETVERBALE"
v_VerbaleId      IN NUMBER DEFAULT NULL,
v_Sezione        IN VARCHAR2 DEFAULT NULL,
v_NumeroVerbale IN VARCHAR2 DEFAULT NULL,
v_DataVerbale    IN DATE DEFAULT NULL,
v_TargaVeicolo   IN VARCHAR2 DEFAULT NULL,
v_Serie          IN VARCHAR2 DEFAULT NULL,
v_LoggedUser IN VARCHAR2 DEFAULT NULL
RETURN SYS_REFCURSOR
AS
   cv_1 SYS_REFCURSOR;
BEGIN
OPEN cv_1 FOR
    SELECT
      ANA_M.VerbaleId,
      ANA_M.Sezione,
      ANA_M.NumeroVerbale,
      ANA_M.DataVerbale,
      ANA_M.TargaVeicolo,
      ANA_M.Serie,
      SCH_C.StatoCartellinoId,
      LOV_StatoCartellino.ListOfValueName StatoCartellino,
      sch_c.cartellinoid
    FROM ANA_Materia_Verbale ANA_M
    INNER JOIN SCH_Cartellini SCH_C ON SCH_C.SoggettoId=ana_m.verbaleid AND SCH_C.TipoSoggettoId = SIS_CONSTANTS_PKG.VB
    INNER JOIN SIC_PROFILO_STATO SIC_PSC ON SIC_PSC.STATOID=SCH_C.STATOCARTELLINOID
    INNER JOIN SIC_PROFILI_USERS SIC_PUC ON SIC_PUC.PROFILOID=SIC_PSC.PROFILOID AND SIC_PUC.PERSONALID=v_LoggedUser
    LEFT JOIN TYP_ListOfValues LOV_StatoCartellino ON LOV_StatoCartellino.ListOfValueId = SCH_C.StatoCartellinoId
    WHERE ( v_VerbaleId = SIS_CONSTANTS_PKG.AnyBigint OR ANA_M.VerbaleId = v_VerbaleId )
      AND ( v_Sezione = SIS_CONSTANTS_PKG.AnyString OR REGEXP_LIKE(ANA_M.Sezione, '^' || v_Sezione || '$', 'i') )
      AND ( v_serie = SIS_CONSTANTS_PKG.AnyString OR REGEXP_LIKE(ANA_M.Serie, '^' || v_Serie || '$', 'i') )
      AND ( v_NumeroVerbale = SIS_CONSTANTS_PKG.AnyString OR ANA_M.NumeroVerbale = v_NumeroVerbale )
      AND ( v_DataVerbale = SIS_CONSTANTS_PKG.AnyDateTime OR ANA_M.DataVerbale = v_DataVerbale )
      AND ( v_TargaVeicolo = SIS_CONSTANTS_PKG.AnyString OR REGEXP_LIKE(ANA_M.TargaVeicolo,'^' || v_TargaVeicolo || '$', 'i') );
RETURN cv_1;
END;
[/code]

....ouch... well that explains a LOT!! The real problem was the Oracle Grid SQL_TUNING that warned me that the SELECT contained a CARTESIAN PRODUCT:
Ristruttura SQL
An expensive cartesian product operation was found at line ID 4 of the execution plan.
Consider removing the disconnected table or view from this statement or add a join condition which refers to it.
A cartesian product should be avoided whenever possible because it is an expensive operation and might produce a large amount of data.
with this EXECUTION PLAN:
Operazione
ID riga
Oggetto
Object type
Ordine
Righe
Dimensione (KB)
Costo
Tempo (sec)
Costo CPU
Costo I/O
SELECT STATEMENT
0
13
1
0,091
460
6
116.852.560
452
NESTED LOOPS OUTER
1
12
1
0,091
460
6
116.852.560
452
NESTED LOOPS
2
9
1
0,079
459
6
116.843.328
451
NESTED LOOPS
3
7
2
0,141
457
6
116.826.984
449
MERGE JOIN CARTESIAN
4
4
2
0,102
451
6
116.781.136
443
INDEX FAST FULL SCAN
5
DOCARK.PK_SIC_PROFILI_USERS
INDEX (UNIQUE)
1
1
0,010
2
1
81.903
2
BUFFER SORT
6
3
2
0,082
449
6
116.699.232
441
TABLE ACCESS FULL
7
DOCARK.ANA_MATERIA_VERBALE
TABLE
2
2
0,082
449
6
116.699.232
441
TABLE ACCESS BY INDEX ROWID
8
DOCARK.SCH_CARTELLINI
TABLE
6
1
0,020
3
1
22.924
3
INDEX RANGE SCAN
9
DOCARK.IDX_SCH_CARTELLINI_SOG_TIPO
INDEX
5
1
2
1
15.493
2
INDEX RANGE SCAN
10
DOCARK.PK_SIC_PROFILO_STATO
INDEX (UNIQUE)
8
1
0,009
1
1
8.171
1
TABLE ACCESS BY INDEX ROWID
11
DOCARK.TYP_LISTOFVALUES
TABLE
11
1
0,012
1
1
9.231
1
INDEX UNIQUE SCAN
12
DOCARK.PK_TYP_LISTOFVALUES
INDEX (UNIQUE)
10
1
0
1
1.900
0
So I started trying to REMOVE the Cartesian Product. But first I had to find it! So apparently I shouldn't worry too much...
The real problem is that I have to work with funtions and DBs created by others, so I am not sure what to expect from most of the Functions. Apparently this execution is correct no matter what that the Tunig Advisor says!
Thanks!

Ora 00918 normalizing problem using cartesian product

I am using a cartesian product to normalise a table. Is there a better way of doing this to avoid the 00918 error?
Thanks in advance ...
select
/* select clause */
from
z_dvo_proj_milestone_summary t1,
z_dvo_proj_milestone_summary t2
where
/* where clause */
create or replace view z_dvo_proj_milestone_summary as
select
query1.projid
,query1.projname
,query1.projtype
,query1.projcode
,query1.report_month
,query1.report_year
,query1.SubProjID
,query1.DVONUM
,query1.measure_type
,query1.MEASURE
,hier.level0_vosa_prj_type
from
(select
score.project as projid
,srm.name as projname
,hier.level0_vosa_prj_type as projtype
,score.code as projcode
,score.report_month as report_month
,score.report_year as report_year
,CASE
when (subprojtab.subprojid = 1) then score.sub_project_1
when (subprojtab.subprojid = 2) then score.sub_project_2
End as SubProjID
,dvonumtab.dvonum as DVONUM
,typetab.measure_type as measure_Type
,CASE
WHEN (subprojtab.subprojid = 1) then
CASE
when typetab.measure_type = 'baseline' then
CASE
when (dvonumtab.dvonum = 1) then score.proj1_dvo1_baseline
when (dvonumtab.dvonum = 2) then score.proj1_dvo2_baseline
End
when typetab.measure_type = 'planned' then
CASE
when (dvonumtab.dvonum = 1) then score.proj1_dvo1_planned
when (dvonumtab.dvonum = 2) then score.proj1_dvo2_planned
End
End
WHEN (subprojtab.subprojid = 2) then
CASE
when typetab.measure_type = 'baseline' then
CASE
when (dvonumtab.dvonum = 1) then score.proj2_dvo1_baseline
when (dvonumtab.dvonum = 2) then score.proj2_dvo2_baseline
End
when typetab.measure_type = 'planned' then
CASE
when (dvonumtab.dvonum = 1) then score.proj2_dvo1_planned
when (dvonumtab.dvonum = 2) then score.proj2_dvo2_planned
End
End
End as MEASURE
from
ODF_CA_PROJSCORE score
left outer join
srm_projects srm on (srm.id = score.project)
left outer join
Z_PROJECT_HIERARCHY hier on (srm.id = hier.level0)
Join
(select 1 as subprojid from dual
union
select 2 as subprojid from dual) subprojtab on (1=1)
/* There will be 11 measures here eventually */
Join
(select 'baseline' as measure_type from dual
union
select 'planned' as measure_type from dual) typetab on (1=1)
Join
(select 1 as dvonum from dual
union
select 2 as dvonum from dual) dvonumtab on (1=1)
WHERE
(CASE
when (subprojtab.subprojid = 1) then score.sub_project_1
when (subprojtab.subprojid = 2) then score.sub_project_2
End) IS NOT NULL) query1
left outer join Z_PROJECT_HIERARCHY hier
on (query1.SubProjID = hier.level0)

I am using a cartesian product to normalise a table. Is there a better way of doing this to avoid the 00918 error?
Thanks in advance ...
select
/* select clause */
from
z_dvo_proj_milestone_summary t1,
z_dvo_proj_milestone_summary t2
where
/* where clause */
create or replace view z_dvo_proj_milestone_summary as
select
query1.projid
,query1.projname
,query1.projtype
,query1.projcode
,query1.report_month
,query1.report_year
,query1.SubProjID
,query1.DVONUM
,query1.measure_type
,query1.MEASURE
,hier.level0_vosa_prj_type
from
(select
score.project as projid
,srm.name as projname
,hier.level0_vosa_prj_type as projtype
,score.code as projcode
,score.report_month as report_month
,score.report_year as report_year
,CASE
when (subprojtab.subprojid = 1) then score.sub_project_1
when (subprojtab.subprojid = 2) then score.sub_project_2
End as SubProjID
,dvonumtab.dvonum as DVONUM
,typetab.measure_type as measure_Type
,CASE
WHEN (subprojtab.subprojid = 1) then
CASE
when typetab.measure_type = 'baseline' then
CASE
when (dvonumtab.dvonum = 1) then score.proj1_dvo1_baseline
when (dvonumtab.dvonum = 2) then score.proj1_dvo2_baseline
End
when typetab.measure_type = 'planned' then
CASE
when (dvonumtab.dvonum = 1) then score.proj1_dvo1_planned
when (dvonumtab.dvonum = 2) then score.proj1_dvo2_planned
End
End
WHEN (subprojtab.subprojid = 2) then
CASE
when typetab.measure_type = 'baseline' then
CASE
when (dvonumtab.dvonum = 1) then score.proj2_dvo1_baseline
when (dvonumtab.dvonum = 2) then score.proj2_dvo2_baseline
End
when typetab.measure_type = 'planned' then
CASE
when (dvonumtab.dvonum = 1) then score.proj2_dvo1_planned
when (dvonumtab.dvonum = 2) then score.proj2_dvo2_planned
End
End
End as MEASURE
from
ODF_CA_PROJSCORE score
left outer join
srm_projects srm on (srm.id = score.project)
left outer join
Z_PROJECT_HIERARCHY hier on (srm.id = hier.level0)
Join
(select 1 as subprojid from dual
union
select 2 as subprojid from dual) subprojtab on (1=1)
/* There will be 11 measures here eventually */
Join
(select 'baseline' as measure_type from dual
union
select 'planned' as measure_type from dual) typetab on (1=1)
Join
(select 1 as dvonum from dual
union
select 2 as dvonum from dual) dvonumtab on (1=1)
WHERE
(CASE
when (subprojtab.subprojid = 1) then score.sub_project_1
when (subprojtab.subprojid = 2) then score.sub_project_2
End) IS NOT NULL) query1
left outer join Z_PROJECT_HIERARCHY hier
on (query1.SubProjID = hier.level0)

What is a cartesian product why we need it and where we need it

Hi,
One of my interview they asked this question
Can any one please tell detail about it.
Thanks
Kalpana

>
what is a cartesian product
>
A cartesian join is when you do not specify any join condition between tables.
So for two tables A and B the result is that every row of table B is appended to every row of table A.
If there are 10 rows in Table A and 20 rows in Table b there will be 200 rows in the result set and each row will contain every column from table A and every column from table b unless you specify specific columns.
See Cartesian Products in the SQL Language doc
http://docs.oracle.com/cd/B28359_01/server.111/b28286/queries006.htm
>
Cartesian Products
If two tables in a join query have no join condition, then Oracle Database returns their Cartesian product. Oracle combines each row of one table with each row of the other. A Cartesian product always generates many rows and is rarely useful. For example, the Cartesian product of two tables, each with 100 rows, has 10,000 rows. Always include a join condition unless you specifically need a Cartesian product. If a query joins three or more tables and you do not specify a join condition for a specific pair, then the optimizer may choose a join order that avoids producing an intermediate Cartesian product.
>
As for when? In earlier versions of Oracle I would use a cartesian join when creating report ready data tables and there needed to be data for every report period. One example is writing a Crystal Report (now business objects) to report sales for 2011 and you want the report to have a section for each month even if there was no data for that month.
Then we would use a cartesian join on a date table that had 12 records (one for each month) with totals of zero. This would make sure that there was at lease one summary record for each month so that every month would show up on the report even if we only had data for March.

Best performance in a cartesian product

i've got a select that needs a cartesian product.
ex:
SELECT NVL(a.year,cp.year) year, NVL(a.month,cp.month), NVL(a.value,0) value
FROM
(select year, month from year, month) cp, values a
WHERE cp.year = a.year(+) AND cp.month = a.month(+)
i have to show all records possible even if they don't have any values on the table.
In the beginning with fewer values, it ran OK.... but now with a lot more it begins to take a little longer (about 10 times longer).
What is the best way to improve this kind of selects???
Thank you.

Best Case :
No one shold be in red color in analysis is the best runtime.
All should be in Green.
or
OK Case :
Database level - Red is not acceptable
ABAP Level - Red can be accepted and can be a good runtime.
System Level - Red is not acceptable.
Worst Case:
All are in Red Color

Query resulting in cartesian product-plz help

select count(distinct e.hiredate),count(distinct b.hiredate) from scott.emp e, scott.emp b where e.hiredate<to_date('01-DEC-80','DD-MON-YY') and b.hiredate<to_date('23-JUN-81','DD-MON-YY')

Hi,
When I query it individually its giving me as below and its correct.
SQL> select count(hiredate) from scott.emp where hiredate<'01-DEC-81';
COUNT(HIREDATE)
9
SQL> select count(hiredate) from scott.emp where hiredate<'23-JUN-81';
COUNT(HIREDATE)
6
Now I want these two merged in same query and it should give me the same result
SQL> select count(distinct e.hiredate),count(distinct b.hiredate) from scott.emp
e, scott.emp b where e.hiredate<'01-DEC-80' and b.hiredate<'23-JUN-81';
COUNT(DISTINCTE.HIREDATE) COUNT(DISTINCTB.HIREDATE)
0 0
But its giving me either cartesian product or the result above.
I have already used logical operator AND .

Urgent plz help me out about cartesian product

plz...its urgent,can anyone help in the following query where iam getting cartesian product,so how to get result without cartesian product
this is the query
SELECT DISTINCT MIS.segment1 "ITEM CODE",
MIS.DESCRIPTION "DESCRIP"
,MIS.Primary_uom_code "UOM",
MTL.LOT_NUMBER "LOT NUMBER"
,A.PARTY_NUMBER "CUSTOMER NUMBER",
A.PARTY_NAME "CUSTOMER NAME",
(A.ADDRESS1||A.ADDRESS2||A.ADDRESS3||A.ADDRESS4) "SHIP TO",
B.DELIVERY_DETAIL_ID "DO NO",B.SHIPPED_QUANTITY "SHIPPED QUANTITY"
,C.ULTIMATE_DROPOFF_DATE "ISSUED DATE"
,D.ORDER_NUMBER "SALES ORDER NUMBER"
,E.LINE_NUMBER "SALES ORDER LINE"
FROM MTL_SYSTEM_ITEMS MIS
,MTL_TRANSACTION_LOT_NUMBERS MTL
,HZ_PARTIES A,
WSH_DELIVERY_DETAILS B,
WSH_NEW_DELIVERIES C,
OE_ORDER_HEADERS_ALL D,
OE_ORDER_LINES_ALL E
WHERE MIS.INVENTORY_ITEM_ID=MTL.INVENTORY_ITEM_ID
AND B.INVENTORY_ITEM_ID=MIS.INVENTORY_ITEM_ID
AND A.PARTY_ID=B.CUSTOMER_ID
AND B.DELIVERY_DETAIL_ID=C.DELIVERY_ID
AND MIS.INVENTORY_ITEM_ID=E.INVENTORY_ITEM_ID
AND D.HEADER_ID=E.HEADER_ID

A lot of times when I get duplicate results, I'll do a select * and see why. Often one of those tables will have a sequenced value that could repeat several times for a combination of values.
If thats the case, you may need to add something like:
...and a.id = (select min(id)
from b
where a.col = b.col)

General algorithm for cartesian product

i am looking for an algorithm to get the cartesian product from a set of sets like {{1,2,3,4},{a,b,c},{x,y,z,7,15}...} - this means in most general form.
google yields no results :-(. i think implementing it by myself is not a good idea.

dermoritz wrote:
prometheuzz is your algorithm better than n*mi n: number of sets mi: cardinality of the set i ?
can you short explain the algorithm?You can't do any better than that because for n sets: S(0), S(1), S(2) ... S(n-1) there are prod(i in [0, n), |S(i)|) elements of the caresian product. Prometeuzz algorithm generates
one at ever pass of the loop executing n steps per element. If you're afraid that the product number will be too large you can also fiddle with the indexes themselves:
// scard[i] == |S(i)|
// prod[i] == element of S(i) in product
int[] next(int[] scard, int[] prod) {
for (int i= prod.lerngth; i-- > 0; prod= 0)
if (++prod[i] < scard[i]) return prod; // return indexes of next product
return null; // no next product anymore
}kind regards,
Jos

Query having cartesian product

hi
i have the following query
select f.item_number, case when f.item_number='1020101002' then f.calc_cement_sk else f.calc_amount end act
            from XXNP_OPN_JOBLOG_EST_002 F WHERE f.OPN_JOBLOG_001_ID ='6369'
output
ITEM_NUMBER     ACT
1020101001     NULL
1020111001     NULL
1020112001     NULL
1020113004     NULL
1020101002     494
1020102007     232
1020103004     37
1020104004     557
1020106002     20896
1020111001     5
1020112005     16253
1020112008     46
1020113004     40
1020222010     1393
ie 14 rows
another query
SELECT J.ITEM_NUMBER,j.opn_value FROM XXNP_OPN_JOBLOG_RES_005 J WHERE J.OPN_JOBLOG_001_ID ='6369'
output
ITEM_NUMBER     OPN_VALUE
1010101003     1
1010101004     3
1010101005     2
1010104016     1
1010103001     76
1010103002     228
1010106001     2
1010106006     147
1010107010     1
1010109009     1
1010107015     866
1010107014     799
1010107016     1631
ie 13 rows
when i do
select f.item_number, case when f.item_number='1020101002' then f.calc_cement_sk else f.calc_amount end act ,j.opn_value
       from XXNP_OPN_JOBLOG_EST_002 F ,XXNP_OPN_JOBLOG_RES_005 J   where   f.OPN_JOBLOG_001_ID = J.OPN_JOBLOG_001_ID and f.OPN_JOBLOG_001_ID ='6369'
i get 182 rows :( i know its due to cartesian product
is there any way i can get 27 rows only ,can i get the output in the format given below
ITEM_NUMBER     ACT                  opn_value
1020101001     NULL
1020111001     NULL
1020112001     NULL
1020113004     NULL
1020101002     494
1020102007     232
1020103004     37
1020104004     557
1020106002     20896
1020111001     5
1020112005     16253
1020112008     46
1020113004     40
1020222010     1393
1010101003                                                                     1
1010101004                                                                     3
1010101005                                                                      2
1010104016                                                                      1
1010103001                                                                     76
1010103002                                                                      228
1010106001                                                                      2
1010106006                                                                     147
1010107010                                                                      1
1010109009                                                                        1
1010107015                                                                      866
1010107014                                                                      791
1010107016                                                                    1631kindly guide
thanking in advance
Edited by: makdutakdu on Mar 31, 2011 8:03 AM

hi
script for XXNP_OPN_JOBLOG_RES_005
CREATE TABLE XXNP_OPN_JOBLOG_RES_005
OPN_JOBLOG_005_ID NUMBER,
OPN_JOBLOG_001_ID NUMBER,
WIP_ENTITY_ID      NUMBER,
WIP_ENTITY_NAME    VARCHAR2(240 BYTE),
OPN_RESOURCE_CODE VARCHAR2(30 BYTE),
OPN_UOM_CODE       VARCHAR2(30 BYTE),
OPN_VALUE          NUMBER,
OPN_MOV_DATE       DATE,
ORG_ID             NUMBER(15),
CREATION_DATE      DATE,
CREATED_BY         NUMBER(15),
LAST_UPDATE_DATE   DATE,
LAST_UPDATED_BY    NUMBER(15),
LAST_UPDATE_LOGIN NUMBER(15),
OPN_RESOURCE_DESC VARCHAR2(500 BYTE),
ITEM_PRICE         NUMBER,
ITEM_NUMBER        NUMBER(10),
DIS_PER            NUMBER(3),
EST_VALUE          NUMBER(15,3),
VAL_ESTAB          NUMBER(15,3)
script for XXNP_OPN_JOBLOG_EST_002
CREATE TABLE XXNP_OPN_JOBLOG_EST_002
OPN_JOBLOG_002_ID   NUMBER,
OPN_JOBLOG_007_ID   NUMBER,
INVENTORY_ITEM_ID   NUMBER,
ITEM_NUMBER         VARCHAR2(20 BYTE),
ITEM_NAME           VARCHAR2(40 BYTE),
ITEM_UOM            VARCHAR2(30 BYTE),
ITEM_VALUE          NUMBER,
ITEM_PERCENT        NUMBER,
OPN_AMOUNT          NUMBER,
ITEM_CEMENT_SK      NUMBER,
ORG_ID              NUMBER(15),
CREATION_DATE       DATE,
CREATED_BY          NUMBER(15),
LAST_UPDATE_DATE    DATE,
LAST_UPDATED_BY     NUMBER(15),
LAST_UPDATE_LOGIN   NUMBER(15),
OPN_JOBLOG_001_ID   NUMBER,
OPN_JOBLOG_006_ID   NUMBER,
ITEM_REF            NUMBER,
DESCRIPTION         VARCHAR2(500 BYTE),
CALC_AMOUNT         NUMBER,
CALC_CEMENT_SK      NUMBER,
)

Joining DB VIEW and Command result in cartesian product

hello,
My SQL query is joining a DB view and a Command(=ad hoc query).
Nonetheless from the results it appears that CR didn't join the views correctly, it returns a cartesian product.
Any idea what the issue could be, I'm using very simple queries.
Thanks in advance

#1 make sure you are linking everything together properly in the "Links" tab of the Database Expert
#2 In my experience, it's just a bad idea to join SQL commands and other tables. I had poor performance issues in my case. (It prevents server side filtering and grouping) My suggestion is to write out the entire thing in the command. If you are pulling from multiple database, write a separate command for each database and link them.

Cartesian product (sum function on 2 tables)

Dear all,
I have 2 tables with columns student_no (foreign key), date and amount in both tables.
now I want to select the sum of the amount for a student for specific date.
the following query is from stu_fee_payment table.
select sum(sfp.amount)
from stu_fee_payment sfp
where student_no =1
and sfp.pay_date < TO_DATE('01-AUG-2010','DD-MON-YYYY')
result: 200
the following query is from stu_fee_adjustment table.
select sum(sfa.adj_amount)
from stu_fee_adjustment sfa
where student_no =1
and sfa.adj_date < TO_DATE('01-AUG-2010','DD-MON-YYYY')
result: 400
now I have the following query
select sum(sfp.amount), sum(sfa.adj_amount)
from stu_fee_payment sfp, stu_fee_adjustment sfa
where sfp.student_no = sfa.student_no
and sfp.student_no =1
and sfp.pay_date < TO_DATE('01-AUG-2010','DD-MON-YYYY')
and sfa.adj_date < TO_DATE('01-AUG-2010','DD-MON-YYYY')
result: 400 400
its some kind of cartesian product because the two tables have no primary foreign key relationship.
how to solve the problem?
Regards:
MN
Edited by: Muhammad Nadeem on Aug 22, 2010 11:55 PM
Edited by: Muhammad Nadeem on Aug 23, 2010 12:58 AM

Hi Nadeem,
Try this one
SELECT sfp_sno,sfp_amount,sfa_amount
FROM
SELECT sfp.student_no sfp_sno, SUM(sfp.amount) sfp_amount
FROM stu_fee_payment sfp
WHERE sfp.pay_date < TO_DATE('01-AUG-2010','DD-MON-YYYY')
GROUP BY sfp.student_no
) x,
SELECT sfa.student_no sfa_sno, SUM(sfa.adj_amount) sfa_amount
FROM stu_fee_adjustment sfa
WHERE sfa.adj_date < TO_DATE('01-AUG-2010','DD-MON-YYYY')
GROUP BY sfa.student_no
)y
WHERE sfp_sno = sfp_no(+) Regards,
Sreekanth Munagala.

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Hello
We have been using CR8.5 for many years and we are just about to perform major upgrade to CR2011. I have, howverm found one strange behavior.
Many of our reports are implemented in following way:
MainTable.DBF (contains reported rows)
ParamTable.DBF (contains one row with some general parameters)
There is no data "link" between these tables but t makes sense to expect that every record from main table will see record from param table.
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in CR2011, however, this seems not to be the case anymore. Namely:
any old report that I open in CR2011 has param line available only for the very first record and I was not able to find a way how to change it
if I recreate the report from the scratch, sometimes Cartesian product is "provided" and sometimes not - I really do not know the reason for the decision.
[I have one very ugly workaround: link these two tables with != (not equal operation) between two unrelated fields that can never be the same]
Is there any "solution" to this cause as it blocks us from upgrading to the latest version?
Kind Regards,
Martin Fontan

Hi Martin,
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We have also never supported unlinked tables, CR is a Relational database reporting tool. Us a subreport if you must use an unlinked table, or as you have discovered using a != type.
Other work around is to use a Command, it' sin the Database wizard, write your own SQL, we simply pass it to the client. There is no option directly to set location from a Table to a SQL Command but search here, Brian Dong found a way around this limitation using a CR Wizard.
Thanks
Don

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