Help with dynamic sql across multiple tables

I have more than one similar table that stores data from different dynamically generated relations:
Following are the scripts to create and populate tables
CREATE TABLE RELATION_1(
    SRC           NUMBER(38, 0)               NOT NULL,
    TRG           NUMBER(38, 0)               NOT NULL,
    VALUE          NUMBER(38, 0)               NOT NULL
CREATE TABLE RELATION_2(
    SRC           NUMBER(38, 0)               NOT NULL,
    TRG           NUMBER(38, 0)               NOT NULL,
    VALUE          NUMBER(38, 0)               NOT NULL
CREATE TABLE RELATION_3(
    SRC           NUMBER(38, 0)               NOT NULL,
    TRG           NUMBER(38, 0)               NOT NULL,
    VALUE          NUMBER(38, 0)               NOT NULL
insert into RELATION_1 values(1, 1, 13);
insert into RELATION_1 values(1, 2, 4);
insert into RELATION_1 values(1, 3, 6);
insert into RELATION_1 values(2, 1, 3);
insert into RELATION_1 values(2, 3, 7);
insert into RELATION_1 values(3, 1, 5);
insert into RELATION_2 values(1, 2, 1);
insert into RELATION_2 values(4, 1, 1);
insert into RELATION_2 values(5, 1, 1);
insert into RELATION_3 values(1, 1, 11);
insert into RELATION_3 values(2, 1, 4);
insert into RELATION_3 values(3, 1, 5);
insert into RELATION_3 values(1, 2, 6);
insert into RELATION_3 values(2, 2, 3);
insert into RELATION_3 values(3, 2, 5);
insert into RELATION_3 values(1, 3, 2);
insert into RELATION_3 values(2, 3, 3);
insert into RELATION_3 values(3, 3, 5);Now, I want to write a SQL that for a set of SRCs (lets say for 1,2,3) give me the top n (let's say top 10) TRGs and the SUM of all the VALUE across all the tables except for RELATION_2, i.e. RELATION_1 and RELATION 3, order by this SUM and exclude those TRGs that have entry for SRC-TRG combination in RELATION_2 table.
Thanks
Edited by: Vasif Shaikh on Sep 21, 2010 2:34 PM

I didn't completely understand your requirement, but couldn't you UNION all the tables together? Then you could do your Top-n and sorting etc as if you were working with one table.

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Help with dynamic SQL

Hello,
I have the following function that works ok:
CREATE OR REPLACE FUNCTION Get_Partition_Name (sTable VARCHAR2, iImportIndex INTEGER)
RETURN VARCHAR2 IS
cursor c is select A.partition_name from (select table_name, partition_name,
extractvalue (
dbms_xmlgen.
getxmltype (
'select high_value from all_tab_partitions where table_name='''
|| table_name
|| ''' and table_owner = '''
|| table_owner
|| ''' and partition_name = '''
|| partition_name
|| ''''),
'//text()') import_value from all_tab_partitions) A where table_name = sTable and A.import_value = iImportIndex;
sPartitionName VARCHAR(20);
err_num NUMBER;
BEGIN
open c;
fetch c into sPartitionName;
IF c%ISOPEN THEN
CLOSE c;
END IF;
RETURN sPartitionName;
EXCEPTION
WHEN OTHERS THEN
err_num := SQLCODE;
--save error in log table
LOG.SAVELINE(SQLCODE, SQLERRM);
END Get_Partition_Name;
I am trying to replace the cursor statement with dynamic SQL, something like (see below) but it doesn't work any more; I think I am missing some quotes.
CREATE OR REPLACE FUNCTION Get_Partition_Name (sTable VARCHAR2, iImportIndex INTEGER)
RETURN VARCHAR2 IS
TYPE t1 IS REF CURSOR;
c t1;
sSql VARCHAR2(500);
sPartitionName VARCHAR(20);
err_num NUMBER;
BEGIN
sSql := 'select A.partition_name from (select table_name, partition_name,
extractvalue (
dbms_xmlgen.
getxmltype (
''select high_value from all_tab_partitions where table_name=''''
|| table_name
|| '''' and table_owner = ''''
|| table_owner
|| '''' and partition_name = ''''
|| partition_name
|| ''''''),
''//text()'') import_value from all_tab_partitions) A where table_name = :a and A.import_value = :b';
OPEN c FOR sSql USING sTable, iImportIndex;
fetch c into sPartitionName;
IF c%ISOPEN THEN
CLOSE c;
END IF;
RETURN sPartitionName;
EXCEPTION
WHEN OTHERS THEN
err_num := SQLCODE;
--save error in log table
LOG.SAVELINE(SQLCODE, SQLERRM);
END Get_Partition_Name;
Please advise,
Regards,
M.R.

Assuming the requirement is to find the partition in the supplied table with the supplied high value and the issue is that dba/all_tab_partitions.high_value is a long, one alternative along the same lines as you've done already is as follows. (I've just used a cursor rather than a function for simplicity of demo).
SQL> var r refcursor
SQL> set autoprint on
SQL> declare
2   ctx dbms_xmlgen.ctxhandle;
3   v_table_name VARCHAR2(40) := 'LOGMNR_USER$';
4   v_value      NUMBER       := 100;
5 begin
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9            ,      high_value hi_val
10            from   dba_tab_partitions
11            where table_name     = :table_name');
12   dbms_xmlgen.setbindvalue(ctx,'TABLE_NAME',v_table_name);
13   open:r for
14   with x as
15   (select xmltype(dbms_xmlgen.getxml(ctx)) myxml
16    from   dual)
17   select extractvalue(x.object_value,'/ROW/TABLE_NAME') table_name
18   ,      extractvalue(x.object_value,'/ROW/PARTITION_NAME') partition_name
19   ,      extractvalue(x.object_value,'/ROW/HI_VAL') hi_val
20   from   x
21   ,      TABLE(XMLSEQUENCE(EXTRACT(x.myxml,'/ROWSET/ROW'))) x
22   where extractvalue(x.object_value,'/ROW/HI_VAL') = v_value;
23 end;
24 /
PL/SQL procedure successfully completed.
TABLE_NAME
PARTITION_NAME
HI_VAL
LOGMNR_USER$
P_LESSTHAN100
100
SQL> I'm sure there are other ways as well. Especially with XML functionality, there's normally many ways to skin a cat.

Selection screen - search help with dynamic sql query

hey ,
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Hi,
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IF CALLCONTROL-STEP = 'SELECT'.
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5) go to se11 and create "Elementary srch hlp"....
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hope this helps...i just tested this and it is working for me....
Thanks..
AS...

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+
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If you found My reply is helpful for you please vote me
thanks
Mustafa EL-Masry
Principle Database Administrator & DB Analyst
SQL Server MCTS-MCITP
M| +966 54 399 0968
MostafaElmasry.Wordpress.Com

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When I use this sql fucytion into a flash chart it does not work. I get this message "No data found".
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Thank you for your kind answers.
Christian

Alex,
Using your request, with the classic report I get results (data), but I get the same message with the Flash chart : "No data found" ! I don't know how to investigate this. i tried many things but nothing works.
Christian
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Edited by: Christian from France on Feb 13, 2009 3:05 AM

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Ishan

I have a "Contact" organization issue I need help with. I organize multiple customers under their account affiliation. I place the people with their contact info under each account name by their dept/role in the notes section of their account. I am l

I have a "Contact" organization issue I need help with. I organize multiple customers under their account affiliation. I place the people with their contact info under each account name by their dept/role in the notes section of their account. I am looking to be able to directly dial / email from this info in yet notes section located within a contact. On Blackberry, the notes area entered in a contact can connect directly but on the iPhone those numbers/emails are inactive. I am trying to avoid having to create each of these individuals as a separate contact and keep them under their account affiliation. It is easier to find them. This does not seem like that complicated of a request and hoping someone can tell me how or share an app that will enable the "notes" within a contact be "active". Hope this makes sense.

I seem to recall that this question has been asked before and I'm pretty sure that the answer is that you can't do what you want to do with the native contact app. However, there are lots of contact apps out there that pull from the built app's data but have other features. Perhaps one of them would meet your needs.

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