How to select from multiple tables which reside on different data stores ?

Suppose I have two data stores in one TimesTen instance:
1) Datastore A:
table1
2) Datastore B:
table2
I want to make a query like this:
select ... from table1, table2 where table1.colA = table2.colB
Can I ? If not, is there a workaround ?
BTW, because of business, we have to use two or more different datastores, so we can not put table1/table2 in the same datastore.
Thanks very much.

You can query multiple TimesTen databases, but your original question was about joining tables from two databases, which is not supported.
Using Cache Connect to Oracle to query an Oracle database is not distributed. It's still one single Oracle database you are querying. You cannot join a table in the TimesTen database with a table in the Oracle database, this is not allowed.
If you are willing to share your business requiremens, we can take a look and see what solution might work for you. Would you like to discuss this offline?
Susan

Similar Messages

Select from multiple tables without join statement

Hey Gurus,
I would like to make a select from a multiple tables to check if there is any reference to my data. I would like to do it with some elegancy, but I don't know how.
Is in abap sql possible to do it only with the select statement?
Or I was also think about a solution that I should fill some data structure with all of the tables which I want to select from and then just loop that data structure and do the select seperately from all of the tables. I just need to check if it founds some results, so no need to store it. If this solution would be fine what data structure should I use?
Or can tell me what would be the best for this?
My code for select from one table, which I want to make for multiple tables:
SELECT SINGLE id_kniznice FROM zbr_t_autori INTO wa_id
       WHERE id_kniznice EQ ls_extract-zview-id_kniznice.
     IF sy-dbcnt > 0.
       MESSAGE i000(zbr_msgc_lib).
       ls_extract-flags-vim_mark = '*'.
       MODIFY extract FROM ls_extract.
ENDIF.
Thank you for any posts.
Regards,
Robert

And there we go again...
Read this topic:
For All Entries is NOT better than INNER JOIN in most cases
And this one:
inner join vs for all entries
Also that one:
Re: LOOP AT vs INNER JOIN
JOINs are really better than for all entries in most cases. Problem is people tend to ignore basic things like using pks or indexes while making them.

Selecting from multiple tables, into one internal table

Hi,
What is the best & most efficient method of selecting from multiple table (in my case 6,) into one internal table?
Thanks,
John
Points will be rewarded and all responses will be highly appreciated.

I have simple example :
First one - Join 5 tables
data : f1 type i,
          f2 type i,
          f3 type i.
start-of-selection.
get run time field f1.
write the query 4 or 5 tables join.
get run time field f2.
f3 = f2 - f1 ( Total time).
Second one - joins 3 table and use for all entries
data : f1 type i,
          f2 type i,
          f3 type i.
start-of-selection.
get run time field f1.
write the query 3 tables join and use for all entries
get run time field f2.
f3 = f2 - f1. ( Total time )
Finally you can have time diffrence between the both sql statement.

Sample PHP Service selecting from multiple tables

Hi all!
I have the following challange:
How do I properly set up my PHP-service to insert, select, update and delete values from multiple tables?
So far, the standard templates generated by Flash Builder is based on a single table.
Example: I have 2 tables: [person] and [school]
[person] has [person_id, first_name, last_name, birthdate]
[school] has [school_id, person_id, school_name, city]
One [person] can have multiple [schools]
How should I define the selectByID function in PHP to be able to have
First name: [TextInput /]
Last name: [TextInput /]
Birthdate: [DateField /]
Schools:
[TabBar: School1, School2, School3 /]
[ViewStack1]
School name: [TextInput /]
Location name: [TextInput /]
[/ViewStack1]]
[ViewStack2]
School name: [TextInput /]
Location name: [TextInput /]
[/ViewStack2]]
[ViewStack3]
School name: [TextInput /]
Location name: [TextInput /]
[/ViewStack3]]
And even more interesting: How do I update all these fields back to the database?

First, the relationship between school and person is many-to-many NOT one-to-many -- you will need to add a junction table.
From the form you have given I would handle insertions like this:
loop through all the schools and see if the school already exist in the DB. If so, then store the school_id. If not, then create a new record and store the id. You should have an array collection of store_ids by the end of the loop
Check whether the student exists w/in the DB. If so, then you might consider aborting the operation or you could opt to do an update. If the student doesn't exist, then create a new student record and store the new student_id (mysql::insert_id)
Loop through the school_id array and add new student_id/school_id records into the junction table.
Retrieving records is much simpler -- it's just a join on the tables i.e. "SELECT * FROM student INNER JOIN school_student ON student.student_id = school_student.student_id INNER JOIN schools ON school_student.school_id = school.school_id WHERE student.first_name = 'John' AND student.last_name = 'Doe' (assuming there aren't more than one John Does of course!).
- e

Urgent. . .About select * from multiple tables

When I am doing the 'Select * from tables' in JSP,
sql = dbconn.prepareStatement("SELECT * FROM protein WHERE protein_id ='"+p_i+"'");
It works, because I only select one table.
Then, I change to select from two tables,
sql = dbconn.prepareStatement("SELECT * FROM protein, fuses WHERE protein_id ='"+p_i+"'");
It also works properly?
However, When I do like:
sql = dbconn.prepareStatement("SELECT * FROM protein, protein_taxa WHERE protein_id ='"+p_i+"'");
It doesn?t work.
So, I think it might be the problem that there is a common column 'protein_id' in both tables, although protein_taxa.protein_id is a foreign key of protein.protein_id. Therefore, I can select two table protein, fuses which have different columns, but no way to select the table they have same name column.
However, it?s essential for me to select all the data from the database. Any way I could achieve it? Thanks a lot!!

SELECT *
FROM protein, protein_taxa
WHERE protein.protein_id = 'a_protein_id'
and protein.protein_id = protein_taxa.protein_id It would also be good to indicate which fields you want on the select clause. This will liberate the server to return two fields with the same name.
SELECT protein.protein_id, protein.name, protein_taxa.taxa /* ??? */
FROM protein, protein_taxa
WHERE protein.protein_id = 'a_protein_id'
and protein.protein_id = protein_taxa.protein_id

Select from Multiple tables

Hi,
I am doing select from multiple tabels (2) in one SQL query.
How to get the result as it says.. Column name is incorrect ?
thanks,
-raj

treat the resultset as noraml. You get it in sequence as you have specified the column names. You use rs.getXXX(index) instead of columnname

How to select from multiple addresses of account in IC Web Client

Hi all,
We are implementing a B2C scenario for IC Web Client. We have customers with multiple addresses. However, when we search the acount, only standard address comes to screen. We want to be able select the related address, and then confirm the acount with that address.
Is there any way to customize the Web Client in order to be able to select from multiple addresses of the acount?
Thanks in advance.
Edited by: Danisman Danisman on Aug 31, 2010 2:52 PM

Thanks for the answer. Yes, we are using 7.0 but in the account identification screen, there is no personalize button ( I assume you are suggesting adding an addres block by using that button, right?).
We checked the necessary customizing : there is an entry for fucntional profile PERSONALIZATION : ALL_ENABLED.
Should we do something else to show the button?
Thanks again.

How can i find the tables which dont contain any data under my database ?

Can you please suggest me a way to find the tables which dont contain any data under my database ?
Regards,
Renu

Can you please suggest me a way to find the tables which dont contain any data under my database ?
For the schema that you've logged in to, you could do something like this:
test@XE>
test@XE> @test
test@XE> --
test@XE> set serveroutput on size 1000000
test@XE>
test@XE> declare
2    n_count number;
3 begin
4    for rec in (select object_name from user_objects
5                where object_type = 'TABLE')
6    loop
7      execute immediate 'select count(*) from '||rec.object_name
8      into n_count;
9      if (n_count = 0) then
10        dbms_output.put_line(rec.object_name);
11      end if;
12    end loop;
13 end;
14 /
BONUS
RUN_STATS
PL/SQL procedure successfully completed.
test@XE>
test@XE>For the other schemas, you could query from dba_objects and probably display the owner as well.
HTH
isotope

How to select from multiple output tables in the SAP Data Source

Hi,
We're using the SAP Data Source to display SAP data in our portal from the Bapi: BAPI_INFORECORD_GETLIST. When defining the Bapi Meta Data we can select data from one of the two output tables (INFORECORD_GENERAL and INFORECORD_PURCHORG). But we want to select data from both tables (some columns we want to show are in INFORECORD_GENERAL and some are in INFORECORD_PURCHORG) .
How can we do this ?
With regards,
Ramon van der Weiden

You can query multiple TimesTen databases, but your original question was about joining tables from two databases, which is not supported.
Using Cache Connect to Oracle to query an Oracle database is not distributed. It's still one single Oracle database you are querying. You cannot join a table in the TimesTen database with a table in the Oracle database, this is not allowed.
If you are willing to share your business requiremens, we can take a look and see what solution might work for you. Would you like to discuss this offline?
Susan

Select from multiple tables through dblink

I am seeking help. Can I select multiple tables through a dblink from a remote database? I tried, it seems it always return ORA-00933 error. code like this:
select A.ID, B.CODE, C.TYPE_DESC
from TABLE_ONE A@db_link , TABLE_TWO B@db_link, TABLE_THREE C@db_link;
where A.ID = B.ID
and B.CODE = C.CODE
Thanks in advance.

Just as an FYI, from a performance standpoint, it is frequently the case (though certainly not guaranteed) that you'll get better performance creating a view on the remote database that does the join of all three tables and to use that view in your query, particularly if you're also joining in local tables. Optimizing SQL statements across database links tends to be particularly hard, a view often helps force Oracle to join the remote tables on the remote database which is generally what you'd want. Of course, this is not a guarantee, and you can always get explicit with hints to force joins to happen on one or the other system, but this is frequently the easiest starting point.
Justin

Is selecting from a view more efficient than selecting from multiple tables

Hi heres the problem
Lets say i created a view from 2 tables (person and info). both have a ID column
create view table_view (age,name,status,id) as
select a.age, a.name, b.status, b.id
from person a, info.b
where a.id=b.idif i want to select a given range of values from these 2 tables which of the following queries would be more effective.
select a.age, a.name, b.status, b.id
from person a, info.b
where a.id=b.id
and a.id <1000
select age, name, status, id
from table_view
where id <1000

Bear in mind that this concept of views storing the SQL text is something relative to Oracle databases and not necessarily other RDBMS products. For example, Ingres databases create "views" as tables of data on the database and therefore there is a difference between selecting from the view and selecting from the base tables.
Oracle also has "materialized views" which differ from normal "views" because they are actually created, effectively, as tables of data and will not use the indexes of the base tables.
In Oracle, you cannot create indexes against "views" but you can create indexes against "materialized views".

Writing select from multiple tables, listed in another table

Hi there.
I need to write a select which is a little complex for me. Here is conditions,
All tables have the same column names, but i want to use staff_no.
All table names written in MASTER_TB table (15 table name).
is there a shortcut to write a sql like i am joining them?
(NO select * from staff t1, emp t2 ,company t3 .....etc....)
THANKS

you will have to write each tables just the same as writing a simple query. this is the part where you will have to write each tables in your FROM clause and any other column in the SELECT statement plus those condition expressions in your WHERE clause as to what you might be needing to arrive in the results that you needed.

How to sum from multiple tables on one table?

I have 12 tables covering 4 separate pages in Numbers, with each of the 12 tables summing each row at the bottom of each table. I'd like to take the sums of each of the 12 tables, and sum each of those sums together into one table. For instance, each table is for a different location, but they each have an "attendance" box. I've summed the attendance for that location for the year, but now I'd like to set a formula so that I can sum ALL ATTENDANCE for ALL LOCATIONS.
Is there anyway to do that?

You can easily combine the two functions. You bracket the ROUND "around" the AVERAGE.
Take your two formulas in their basic forms.
=AVERAGE(D1:D4) will average cells D1 to D4
=ROUND(A,2) will round up number A to 2 decimal places.
Now, we want to round up the result of the Average formula so, replace the A in the ROUND with the entire AVERAGE formula above (cut and paste is good here):
=ROUND(AVERAGE(D1:D4),2)
This will first calculate your average and then round it up to 2 decimals.
If you want to round to the nearest whole number use 0
Hope this is what you need.
M.

How to map from one table to another dependable on data from lookup?

I'm new in warehouse builder and i wonder how to do something what is very easily done by sql..
I want to map data from table_a to table_b, but not all rows - only those for which one of attributes in table_a have reference in table_c (is not null)...
I suppose it should go somehow with lookup operator, but playing with it, I wasn't able to achieve goal..
Thanks in advance for any help..

Hi Zeljko,
On of the easier ways (in my experience) of accomplishing this is to define a view which does a SELECT DISTINCT on table A and uses an EXISTS clause to exactly filter those records that you want to get into your target table (i.e. the ones that already have an occurrence in table C).
And if performance is an issue, you could experiment with FIRST_ROWS hint or rownum=1 in the EXISTS clause.
Cheers, Patrick

Selecting from Multiple Tables but requiring data to match from a 3rd table

Hello Everyone,
I'm having alot of trouble with this select
I have three tables:
prod_poured, conc_test, and cyl_breakTo put together my report, I need to grab this data:
cyl_break.pour_no "Pour Number", cyl_break.cyl_id "Cylinder ID", cyl_break.pour_d "Pour Date", conc_test.mix "Mix #", conc_test.amb_t "Ambient Temperature", conc_test.conc_t "Concrete Temperature", conc_test.air "Air %", cyl_break.break_d "Break Date", cyl_break.age "Age (Days)", cyl_break.spec_str "Specified Strength", cyl_break.str "Specimen Strength"and I need it to grab all data in those two tables when one column in the prod_poured table meets a certain condition
This is what I have so far:
select cyl_break.pour_no "Pour Number", cyl_break.cyl_id "Cylinder ID", cyl_break.pour_d "Pour Date", conc_test.mix "Mix #", conc_test.amb_t "Ambient Temperature", conc_test.conc_t "Concrete Temperature", conc_test.air "Air %", cyl_break.break_d "Break Date", cyl_break.age "Age (Days)", cyl_break.spec_str "Specified Strength", cyl_break.str "Specimen Strength"
from conc_test inner join cyl_break on conc_test.pour_no = cyl_break.pour_no, prod_poured
where conc_test.pour_no = prod_poured.test_id and prod_poured.job_no = '9-12-821';It gives me the right results but wayyy too many of them so obviously I've got something wrong.
the results it gives are this:
Pour Number     Cylinder ID     Pour Date     Mix #     Ambient Temperature     Concrete Temperature     Air %     Break Date     Age (Days)     Specified Strength     Specimen Strength
100322A     100322A3     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.6
100322A     100322A3     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.6
100322A     100322A3     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.6
100322A     100322A3     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.6
100322A     100322A3     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.6
100322A     100322A3     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.6
100322A     100322A3     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.6
100322A     100322A3     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.6
100322A     100322A3     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.6
100322A     100322A4     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.4
100322A     100322A4     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.4
100322A     100322A4     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.4
100322A     100322A4     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.4
100322A     100322A4     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.4
100322A     100322A4     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.4
100322A     100322A4     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.4
100322A     100322A4     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.4
100322A     100322A4     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.4
100324A     100324A3     24-MAR-10     10     9     15     5.8     21-APR-10     28     35     51.9
100324A     100324A3     24-MAR-10     10     9     15     5.8     21-APR-10     28     35     51.9
100324A     100324A3     24-MAR-10     10     9     15     5.8     21-APR-10     28     35     51.9
100324A     100324A3     24-MAR-10     10     9     15     5.8     21-APR-10     28     35     51.9
100324A     100324A4     24-MAR-10     10     9     15     5.8     21-APR-10     28     35     50.8
100324A     100324A4     24-MAR-10     10     9     15     5.8     21-APR-10     28     35     50.8
100324A     100324A4     24-MAR-10     10     9     15     5.8     21-APR-10     28     35     50.8
100324A     100324A4     24-MAR-10     10     9     15     5.8     21-APR-10     28     35     50.8
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49
100324E     100324E3     24-MAR-10     10     10     15     6     21-APR-10     28     35     50.7
100324E     100324E3     24-MAR-10     10     10     15     6     21-APR-10     28     35     50.7
100324E     100324E3     24-MAR-10     10     10     15     6     21-APR-10     28     35     50.7
100324E     100324E3     24-MAR-10     10     10     15     6     21-APR-10     28     35     50.7
100324E     100324E3     24-MAR-10     10     10     15     6     21-APR-10     28     35     50.7
100324E     100324E4     24-MAR-10     10     10     15     6     21-APR-10     28     35     51.6
100324E     100324E4     24-MAR-10     10     10     15     6     21-APR-10     28     35     51.6
100324E     100324E4     24-MAR-10     10     10     15     6     21-APR-10     28     35     51.6
100324E     100324E4     24-MAR-10     10     10     15     6     21-APR-10     28     35     51.6
100324E     100324E4     24-MAR-10     10     10     15     6     21-APR-10     28     35     51.6The results I need it to give are this:
100322A     100322A3     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.6
100322A     100322A4     22-MAR-10     10     16     16     4.2     19-APR-10     28     35     50.4
100324A     100324A3     24-MAR-10     10     9     15     5.8     21-APR-10     28     35     51.9
100324A     100324A4     24-MAR-10     10     9     15     5.8     21-APR-10     28     35     50.8
100324E     100324E3     24-MAR-10     10     10     15     6     21-APR-10     28     35     50.7
100324E     100324E4     24-MAR-10     10     10     15     6     21-APR-10     28     35     51.6
100326B     100326B3     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     48.3
100326B     100326B4     26-MAR-10     10     9     15     5.7     23-APR-10     28     35     49As you can see my query provides the right results, just way too many of them. I only need to have one result per cylinder id.
I can't seem to wrap my mind around this one and if somebody could put together a proper select based on what I need that would be extremely helpful. If you need any more data to provide help just ask and I'll paste it.
Thanks,
dtr
Edited by: dtr on Apr 26, 2010 11:12 AM

dtr wrote:
Hi,
Here are the create table statements:
create table conc_test
(p_date date, job_no varchar, mix varchar, pour_no varchar, amb_t varchar, conc_t varchar, slump varchar, air varchar, density varchar, cyl_cast_time timestamp)
create table cyl_break
(job_no varchar, pour_no varchar, cyl_id varchar, pour_d varchar, break_d varchar, age varchar, spec_str varchar, str varchar, mix);
create table prod_poured
(prod_id varchar, pour_id varchar, test_id varchar);
Great!
Don't forget to post the INSERT statements, and the output from that data (if it is different from what you posted in your first message).
Basically I need to pull the data I showed above out of conc_test and cyl_break, but only data that has the proper job_number which is retrieved from the prod_poured table. The prod_poured test_id for everything that has the proper prod_poured job_no So an IN-subquery, like Sudhakar and I suggested, should work.
What was the problem when you tried them? Post the query you ran, even if you just copied and pasted it from this thread: there may have be an editing error.
prod_poured test_id is the same thing as conc_test pour_no and cyl_break pour_noExactly! But that doesn't answer the question: Is that value unique in all the tables? If not, in which tables can it be duplicated?

How to select from multiple tables which reside on different data stores ?

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