Inner Join between two big tables

Hi There,
I have a situation where in which I have to write an inner join between two table of the order of (30k to 60 rows).
My query is as simple as,
select A.a,B.b from A ,B where A.a = B.b;
N.B: a and b are of type varchar
But the problem is it takes nearly 15 mins to run. Is there any better way of doing an inner join between such bigger tables?
Thanks,
Jose John.

Thank you all for your help.....Indexing works....:)
--JJ

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Can we apply join between two internal tables?

Itab has fields A,B,C.
Data: begin of itab occurs 1,
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Jtab has fields A, I, J.
Data: begin of itab occurs 1,
         A type I,
         I type I,
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The common field between itab and jtab is u201CAu201D.
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If I use a SELECT query with inner join between itab and jtab it says u201Citab is not a database tableu201D.
How should I get the result ktab with A B C I J fields?
Please help, nay help will be highly appreciated?

a®s wrote:
>
> sort itab_all by A
> delete adjacent duplicates from itab_all comparing A.
>
>
Do you have the above code in ?
Here A is common field between both tables, first we are appending itab_1 & itab_2 into table itab_all then deleting the adjacent duplicates from itab_all. then we are reading itab_1 & itab_2 for possible matches and update the same values in itab_all
so there will NOT be a chance of duplicates in itab_all
a®

Join between two nested tables question

Hi. I have two nested tables with a join statement drawing info from both. The query looks like this:
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You're right, by non-matching I mean null values.
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Running the query using un-nested data returns this result (this is what I'm after):
(N.LASTLOGONDATE,'YYYY') /COUNT(N.U_NAME) /ACCOUNTDISABLED
2005 3408 No
2002 1 Yes
2005 27 -
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Joining on two large tables give breaks connections?

I am doing inner join on two large tables (172,818 and 146,215) give breaks connections. Using Oracle 8.1.7.0.0
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Oraigannly I was trying to do alter table to add constrints, it gave the error aswell.
ALTER TABLE a ADD (CONSTRAINT a_FK
FOREIGN KEY (a_ID, a_VERSION)
REFERENCES b(b_ID, b_VERSION)
DEFERRABLE INITIALLY IMMEDIATE)
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Thanks for the reply, no luck yet.
SQL> show parameter optimizer_max_permutations ;
NAME TYPE VALUE
optimizer_max_permutations integer 80000
SQL> show parameter resource_limit ;
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resource_limit boolean FALSE
SQL>

Subject: How to do join between two tables using something like SE16

SE16, SE11 provide form based interface query information from a single table. Is there a way to do join between two tables without creating an infoset erc? I am looking for something similar to sql join but in SAP BI 7.0
Thanks.

Hi
Pls look into below links. Hope this helps you.
1. http://help.sap.com/saphelp_46c/helpdata/EN/d2/cb45bf455611d189710000e8322d00/content.htm
2. http://help.sap.com/saphelp_46c/helpdata/EN/d2/cb45a5455611d189710000e8322d00/content.htm
Regards
Sirigiri

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Hello everybody,
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Hi,
Well a conformed dimension is a bridge table between two facts, so not sure why you need anything else. If there is a one to many from D1 to F1 and a one to many from D1 to F2 then effectively there is a many to many join from F1 to F2 through the D1 dimension.
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Try this. Create an two aliases for the TIMES dimension (Start & End) in the Physical Layer and then remove foreign key to the "Parent" Times dimension. Create the Foreign Key in the Physical Layer to the new aliases and then create the complex joins in the BMM Layer to the new aliases as well. This will allow you to present both dates within the same table in the Presentation Layer. Not the most elegant solution but it works.

Joins between two schemas

Hi
I need data from two different schemas. Can develop one subject area taking 2 tables from 2 different schemas or we need to have these two tables from one schema only ?
Can any one help on this.
Thanks
Manu

Hi,
When you try to create physical join between these two tables of different schemas.
The join condition is REGION.REGION_CODE = REGION.REGION_ID
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Now as soon as I click on Ok, it gives an error.Because You can not create join between two tables with the same name.
So, create alias for these two tables and try to create the join with the same join condition.
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Reload the rpd and run the same report, it would give correct result.
But instead you can have the tables in the same schema for better maintenance activities.
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MuRam

Error while running code template mapping between two oracle tables

Hello All
Iam getting the following error while running code template mapping between two oracle tables. Using OWB 11gR2 and oracle 11gR2 DB.
java.sql.SQLException: ORA-20001: The active workspace is not valid as a target for this mapping
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ORA-06512: at "OWBSYS.WB_RT_MAPAUDIT_UTIL", line 1087
ORA-06512: at "SOURCE.FILENET_EX_UNIT_3", line 555
ORA-06512: at line 4
Quick help is highly appreciated.

Dera Dallan
its only a target user for the workspace where you are deploying the mapping from.
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Find the difference between two internal table

how can i see the difference between two interal tables?
The requirement is as follows
1. We have a transparent table, which stores the employee data with EMP ID as key.
2. We load the transp table data into a interal table (B).
3. We get data from legecy system as file and it gets loaded into another internal table (A) (this also has the same EMP ID key and this will have latest addition/update to those emplyees).
Now we need to seperate out these data into three interal table Inserted (I), Deleted (D) and Updated (U).
We want to do followign things
I = A - B
D = B - A
Both A and B will have around 40k records. Hence we are trying to avoid the looping.
Please suggest the best option for us.
Thank you in advance.
Raghavendra

>
RAGHAV URAL wrote:
> how can i see the difference between two interal tables?
> The requirement is as follows
>
> 1. We have a transparent table, which stores the employee data with EMP ID as key.
> 2. We load the transp table data into a interal table (B).
> 3. We get data from legecy system as file and it gets loaded into another internal table (A) (this also has the same EMP ID key and this will have latest addition/update to those emplyees).
>
> Now we need to seperate out these data into three interal table Inserted (I), Deleted (D) and Updated (U).
>
> We want to do followign things
> I = A - B
> D = B - A
>
> Both A and B will have around 40k records. Hence we are trying to avoid the looping.
>
> Please suggest the best option for us.
>
> Thank you in advance.
> Raghavendra
Hi Raghavendra,
Currently as of my knowledge, these operations are only possible through LOOPs. But LOOPign can be really fast here if you properly utilize the SORTING, READ with BINARY SEARCH and FIELD-SYMBOLS usage. I would say:-
Steps for Insert:-
SORT: A, B.
LOOP AT A ASSIGNING <WA_A>.
READ TABLE B WITH TABLE KEY key = <WA_A>-key BINARY SEARCH.
IF SY-SUBRC NE 0.
APPEND <WA_A> TO I.
ENDIF.
ENDLOOP.
Steps for Delete:-
SORT: A, B.
LOOP AT B ASSIGNING <WA_B>.
READ TABLE A WITH TABLE KEY key = <WA_B>-key BINARY SEARCH.
IF SY-SUBRC NE 0.
APPEND <WA_B> TO D.
ENDIF.
ENDLOOP.
Regards,
Ravi.

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Performance between two partitionned tables with different structure

Hi,
I would like if there is a difference between two partitionned tables with different structure in term of performance (access, query, insertions, updates ).
I explain myself in detail :
I have a table that stores one value every 10 minutes in a day (so we have 144 values (24*6) in the whole day), with the corresponding id.
Here is the structure :
| Table T1 |
+ id PK |
+ date PK |
+ sample1 |
+ sample2 |
+ ... |
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There is an additionnal index on the column (id) (is it useful ?).
I would like to know if it is better to have a table with just (id, date, value) , so for one row in the first table we'll have 144 rows in the future? table. The partition will already be on the columns (id, date) with the index associated.
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I discuss with the Java developers and they say it is simpler to manage in their code.
Oracle version : Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
Thanks & Regards
From France
Oliver
Edited by: 998239 on 5 avr. 2013 01:59

I mean storage in tablespaces and datafiles on disk.
Can you justify please and give me concrete arguments why the two structures are equivalent ( except inserting data in T(id, date,value))
because i have to make a report.i didnt say any thing like
two structures are equivalent ( except inserting data in T(id, date,value)i said
About structure : TABLE1(id, date, value) is better than TABLE1(id, date, sample1, .... sample144)because
1) oracle has restriction for numbers of column. Ok you can have 144 columns now but for future if you must have more than 1000 columns , what will you do?
2) Restrictions on Table Compression (Table compression is not supported for tables with more than 255 columns.)
3) store same type values on diffrent columns is bad practise
http://docs.oracle.com/cd/B28359_01/server.111/b28318/schema.htm#i4383
i remember i seen Toms article about this but now i cant find it sorry ((( if i found i will post here

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DB Version: 10.2.0.5
We have :
Table A(Range-List Partitioned):
Partition A1 -> Sub-Partition S1A1 and S2A1
Partition A2 -> Sub-Partition S1A2 and S2A2
Table B(Range-List Partitioned):
Partition B1 -> Sub-Partition S1B1 and S2B1
Partition B2 -> Sub-Partition S1B2 and S2B2
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The following statement does not work...
ALTER TABLE A EXCHANGE SUBPARTITION S1A1
WITH TABLE B SUBPARTITION S1B1 INCLUDING INDEXES;
Please advice.

Hi,
ALTER TABLE A EXCHANGE SUBPARTITION S1A1 WITH TABLE B INCLUDING INDEXES;
Read the document
http://www.stanford.edu/dept/itss/docs/oracle/10g/server.101/b10739/partiti.htm
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Hi,
I work with sharepoint 2010.
I did the join between two list follow this
post.
I did it and everything is ok, but the order doesn't work.
What can be it?
Thanks
K2rto'4 - Analista Sharepoint
"Hoje melhor do que ontem, amanhã melhor do que hoje!" 改善

Hi,
I've two lists in my view with join. The list A and the list B.
I'm ordering the view with the column list A.
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Hugs
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"Hoje melhor do que ontem, amanhã melhor do que hoje!" 改善

Intervals, synchronize the data between two oracle tables located in diffe

Hi Experts,
Is there any way I can, at set intervals, synchronize the data between two oracle tables located in different servers? What is the software, if there is any? If there are steps I can follow, so much the better.
Thanks!

I'm not sure what you want to achieve here...
I want to synchronize both the Servers , so that it can update HO servers as well as Factory Server with the complete data. Could you please elaborate a little bit more; basing on your description I could also tell you how to setup timesync for those two servers if I understand "complete data" as the current date and time...
Also a lot of solutions are platform and version specific so it would help if you could indicate OS and Database Versions (4 digit).
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cheers

Inner Join between two big tables

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