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.

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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
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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 .

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Hi,
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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.

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)

Getting cartesian product

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

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          MIS.INVENTORY_ITEM_ID = E.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 C........ = D. .......
   AND          D.HEADER_ID           = E.HEADER_ID
;I am not sure but I guess a relationship (in bold) is missing.
HTH
Ghulam

How to join two lists and display the results in datasheet view.?

hello,
i have two lists that i would like to join, i know a method that has been described in the link below
http://www.codeproject.com/Articles/194252/How-to-Link-Two-Lists-and-Create-a-Combined-Ciew-i
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Dimitri Ayrapetov (MCSE: SharePoint)

Resulting in Cartesian Join

Hi friends,
I need to restrict the report according to the user who logs in to the application. But only for the ADMIN user i need to show all the records except with the status which is not in "CREATED', i need to show all the records to the admin with other status other than the 'CREATED" status.
For that i tried with the below query
select
'' "Null",
"REQUEST_ID",
"REQUEST_TYPE_NAME",
"REQUEST_NUMBER",
"REQUEST_CLASS_NAME",
"REQUEST_STATUS_NAME",
"REQUEST_DATE"
from XXHY_AMS_REQ_DET_V , apps.fnd_user xx
where /*request_number like nvl(:P1_REQUEST_NUMBER,'%')
and
REQUEST_STATUS_CODE like nvl(:P1_REQUEST_STATUS,'%')
and
lower(REQUEST_DATE) LIKE NVL(lower(:P1_REQUEST_DATE), '%')
and */requestor_person_id = xx.employee_id or
lower(xx.user_name) = lower(:APP_USER) or
exists (select 1 from apps.per_all_people_f papf,
     apps.per_all_assignments_f paaf,
     apps.per_all_people_f supf,
     apps.pqh_roles rls,
     apps.per_people_extra_info pei,
     apps.fnd_user a, XXHY_AMS_REQ_DET_V b
where papf.person_id = paaf.person_id and pei.person_id = paaf.person_id
and nvl(paaf.supervisor_id, papf.person_id) = supf.person_id
and sysdate between papf.effective_start_date and papf.effective_end_date
and sysdate between paaf.effective_start_date and paaf.effective_end_date
and sysdate between supf.effective_start_date and supf.effective_end_date
and a.employee_id = papf.person_id
and lower(a.user_name) = lower(:APP_USER)
and information_type = 'PQH_ROLE_USERS' and paaf.person_id = b.requestor_person_id and lower(b.request_status_code) not in ('created')
and rls.role_id = to_number (pei.pei_information3)
and rls.role_id = to_number (pei.pei_information3) and rls.role_name like 'XXHW_AMS_ADMIN')
order by 1
In the above query i used the keyword :APP_USER which identifies the user who logs in APEX.
Also i have a role named XXHW_AMS_ADMIN, which identifies the user under the admin category.
So, according to my query, if the user is not in the admin category means, it has to show only the records raised by him. If the user is in the admin category means then it has to show all the records of all the users other than the status which is not in 'CREATED'.
But my above query is resulting in cartesian join, if i check with the admin username.
But it fetches the correct result if i checked with the user who is not in the admin category.
I dont know why the cartesian join is occuring if i check with the admin user.
Suppose if i tried to run the query separately which is beneath the EXIST condition* for checking the admin user means, then it is recognizing the admin. But i dont know why it is not working in my above query.*
select 1 from apps.per_all_people_f papf,
     apps.per_all_assignments_f paaf,
     apps.per_all_people_f supf,
     apps.pqh_roles rls,
     apps.per_people_extra_info pei,
     apps.fnd_user a, XXHY_AMS_REQ_DET_V b
where papf.person_id = paaf.person_id and pei.person_id = paaf.person_id
and nvl(paaf.supervisor_id, papf.person_id) = supf.person_id
and sysdate between papf.effective_start_date and papf.effective_end_date
and sysdate between paaf.effective_start_date and paaf.effective_end_date
and sysdate between supf.effective_start_date and supf.effective_end_date
and a.employee_id = papf.person_id
and lower(a.user_name) = lower(:APP_USER)
and information_type = 'PQH_ROLE_USERS' and paaf.person_id = b.requestor_person_id and lower(b.request_status_code) not in ('created')
and rls.role_id = to_number (pei.pei_information3)
and rls.role_id = to_number (pei.pei_information3) and rls.role_name like 'XXHW_AMS_ADMIN')
order by 1what might be wrong in my query.
Brgds,
Mini

I was using SQL Developer so i used colon.
For Sql plus I changed it to & and it is working as expected
SQL> with t_user as
        select 1 as person_id, 'P1' as user_name from dual union all
        select 2,'P2' from dual union all
        select 3,'P3' from dual union all
        select 4,'P4' from dual union all
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t_req_data as
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        select 1 , 'updated' , sysdate-0.5 from dual union all
        select 2 , 'deleted' , sysdate from dual union all
        select -1 , 'created' , sysdate from dual union all
        select -1 , 'updated' , sysdate from dual union all
        select -1 , 'created' , sysdate - 21 from dual union all
        select -1 , 'updated' , sysdate - 21 from dual union all
        select 2 , 'deleted' , sysdate from dual
SELECT
    tu.person_id,
    tu.user_name,
    trq.request_status_code,
    trq.some_data
FROM
    t_user tu,
    t_req_data trq
WHERE
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AND
            &in_user             = 'ADMIN'
        AND request_status_code != 'created'
     OR
              &in_user != 'ADMIN'
        AND &in_user = user_name
Enter value for in_user: 'ADMIN'
old 33:             &in_user             = 'ADMIN'
new 33:             'ADMIN'             = 'ADMIN'
Enter value for in_user: 'ADMIN'
old 38:             &in_user != 'ADMIN'
new 38:             'ADMIN' != 'ADMIN'
Enter value for in_user: 'ADMIN'
old 39:         AND &in_user = user_name
new 39:         AND 'ADMIN' = user_name
PERSON_ID USER_ REQUEST SOME_DATA
         1 P1    updated 13-DEC-2011 22:14:32
         2 P2    deleted 14-DEC-2011 10:14:32
        -1 ADMIN updated 14-DEC-2011 10:14:32
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         2 P2    deleted 14-DEC-2011 10:14:32
SQL>

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Sorry me English and if somebody talks Spanish you can go check my blog http://www.developyourdream.net/

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Hi,
what is the differnce between view and join table

Hi,
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join
Views vs Inner Join
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I have recently transferred data from my old Mac to my new one. The result was good, but I have 2 users now, whose data I want to merge into 1 single user, so to avoid having to switch from one user to the other to view and use certain files. How to do it

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Here's an easy way:
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How to restore views and procedures after drop user command?

How to restore views and procedures after drop user command?
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Ok, now the story: another developer dropped this db user and we lost everything: procedures, functions and vews. The new user with trhe same name was created and new schema was imported in this user, but all old objects are lost. We don't have export and backup and archive log files.
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Thanks.
Victor
[email protected]

The switch has occurred after user was dropped, the data has been overwritten and there is be no way to use redo log files.
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The Full Screen icon does not appear in Firefox 16.0.2 on Mac OS 10.6.8, and command+shift+F does not close the full screen view.

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I forgot one detail. This happened while I was having trouble seeing the mouse cursor (I use Apple's Magic Mouse). It had disappeared briefly. I had to drag the cursor out of the Firefox Window for it to reappear. I accidentally entered full screen view while the cursor was not visible.

Can we write a join on a view and a table

Hi all,
can we write a join on a view and a table. i got the requirement from my functional people about the following one
Select CAUFV-AFUNR, CAUFV-AUART, AFVC-VORNR, CAUFV-FTRMI, CRHD-ARBPL
into <ProOrd>, <OrdTyp>, <Opt>, <RelDat>, <WorCen>
from CAUFV, AFVC, CRHD
where CAUFV-WERKS = plant in selection screen
and CAUFV-AFUNR = production order in selection screen
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and CAUFV-FTRMI = range of release date in selection screen
and CAUFV-AUFPL = AFVC-AUFPL
and AFVC-ARBID = CRHD-OBJID
and CRHD-OBJTY = A
here CAUFV is a view and CRHD and AFVC are transperent tables.
please tell me any feasible solution for this..
Thanks in Advance..

Hi
Refer these links:
http://help.sap.com/saphelp_nw04/helpdata/en/cf/21ec84446011d189700000e8322d00/content.htm
http://www.sap-img.com/abap/what-is-the-different-types-and-usage-of-views.htm
http://www.karakas-online.de/forum/viewtopic.php?t=730
Thanks
Vasudha
Message was edited by:
Vasudha L

Joining DB VIEW and Command result in cartesian product

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