No Easy Way to Join on Tables from Different Schemas

Hi,
The company policy does not allow to join on tables from different schemas or use db links...
I'm tasked to come up with a Perl script that does exactly that - allows for the SELECT statement to do several joins on 3 different schemas. In addition 1 of the schemas is on the different host altogether.
Upping the privileges for my user and allowing db links is not an option...Can someone, please help me to understand on a conceptual level how would I use Perl and what logic would it have and what would it (perl) do?
Thank you,

Court in the wrong job... ;)
It's like a librarian who is a hard rock artist maintaining the silence in the premises. ;)
My dear friend, i don't think this is the right place for your requirement. This is the PL/SQL forum. If you have any problem related PL/SQL or SQL you can place that here.
Regards.
Satyaki De.

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How do you join two tables from different Oracle schemas using a subquery

I am trying to join two tables from different Oracle schemas using a subquery. I can extract data from each of the tables without a problem. However, when I combine the select statements using a subquery I get the Oracle error *'ORA-00936: missing expression'*. Since each SELECT statement executes on its own without error I don't understand what is missing. The result set I am trying to get is to match up the LINE_ID from PDTABLE_12_1 in schema DD_12809 with the MAT_DESCRIPTION from table PDTABLE_201 in schema RA_12809.
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sql = "SELECT [DD_12809].[PDTABLE_12_1].LINE_ID FROM [DD_12809].[PDTABLE_12_1] JOIN " _
+ "(SELECT [RA_12809].[PDTABLE_201].MAT_DESCRIPTION " _
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The format of the query is copied from a SQL programming manual.
I also tried executing the query using a straight JOIN on the two tables but got the same results. Any insight would be helpful. Thanks!
Edited by: user11338343 on Oct 19, 2009 6:55 AM

I believe you are receiving the error because you are trying to JOIN on a column that doesn't exist. For example you are trying to join on FAB.PIPING_MATER_CLASS but that column does not exist in the subquery.
If you want to do a straight join without a subquery you could do the following
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,       FAB.MAT_DESCRIPTION
FROM    DD_12809.PDTABLE_12_1
JOIN    RA_12809.PDTABLE_201    AS FAB ON DD_12809.PDTABLE_12_1.PIPING_MATER_CLASS = FAB.PIPING_MATER_CLASS HTH!

Can we join table from different schema?

Hi
All,
I have a SYS schema and MED schema. Now, I want to join DBA_USERS tables from SYS schema to EMPLOYEE table from MED schema to get an username. i am using following query but it's not working.
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g8 it is working now I just modify my query to make user name in upper case and then compare..
select username,empl_userid,empl_nm_lst,empl_nm_fst from sys.dba_users db, med.employee emp where db.username = upper(emp.empl_userid);
before that it was returning nothing..
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Edited by: vishal patel on Sep 29, 2008 2:39 PM
Edited by: vishal patel on Sep 29, 2008 2:40 PM

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Hi All,
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1.
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Best regards,
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Hi
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Is anbody help me? please
Table1 in Schema1
Table2 in Schema2
TableID is the column which I join two tables (Table1.TableID=Table2.TableID)
User1 has Select grant to both tables (it works when I run the query but in the sp which is in the package it doesn't work)
Package1 in Schema1

query is working
but when I put that query in to package, Package is giving error like "table or view does not exist"
Table1 in Schema1
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User1 has Select grant to both tables (it works when I run the query but in the sp which is in the package it doesn't work)
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is working in editor but
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is not working
Must I give grant to Package?
Edited by: 874779 on 25.Tem.2011 03:37
Edited by: 874779 on 25.Tem.2011 03:51

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Please don't forget to Marked as Answer if my post solved your problem and use Vote As Helpful if a post was useful. It will helpful to other users.

Thanks.
Join Table4 CA on RTRIM(T1.Col1) + T2.Col2 = CA.Col1
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Thanks! Eshwar.
Please don't forget to Marked as Answer if my post solved your problem and use Vote As Helpful if a post was useful. It will helpful to other users.

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Hi,
I'm curious if I make something wrong or if this is not possible:
I want to use two tables each in a different schema. I can drop them into the DataFoundation, can connect them, assign them some measure. But activation fails due to insufficient privileges. When I use the tables from the same schema activation works well. With the insufficient privileges I would guess HANA cannot create a View (failed with the statement CREATE COLUMN_VIEW "_SYS_BIC"."USER/ANALYTIC_VIEW_NAME"....).
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Edited by: Adi's on 24-Jan-2010 03:30

i am done with this report...
sorry for editing it like that
Edited by: Adi's on 24-Jan-2010 03:31

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No Easy Way to Join on Tables from Different Schemas

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