Disco Plus and Sub-queries in conditions

Hi,
I have a strange behaviour for a report using a sub-query in the condition:
in Desktop Edition and Viewer it works just fine, in Plus no data is returned.
I am using Discoverer 9.0.2.
The condition was created from the Desktop using an existing datasheet, both data sheets using the same parameter.
I examined the SQL code from Plus and the statement returns data and the sheet with the sub-query also returns data - nevertheless the report doesn't return any data.
As far as I know you cannot create or modify sub-queries in conditions with PLus - but at least the report should work?! Does anyone know where the problem could be?
Thank you very much in advance!
Alex

Trying to create a sub-query in discoverer...
Using Desktop (9.04 and 10.1.2), the option "Create Sub-Query" is not available in the condition values. Feel like I'm missing something - has anyone come across this before?
I assume sub-queries should be possible/supported in Plus 10.1.2 (although it's not in the user guide). If so, the Create Sub-Query option is not available like in Desktop. If not, why not - seeing as it's basic sql commonly used in reporting?
Thanks!

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In which sequence are queries and sub-queries executed by the SQL Engine

In which sequence are queries and sub-queries executed by the SQL Engine?
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a. primary query -> sub query -> sub sub query and so on
b. sub sub query -> sub query -> prime query
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In which sequence are queries and sub-queries executed by the SQL Engine?
Which is correct ?
a. primary query -> sub query -> sub sub query and so on
b. sub sub query -> sub query -> prime query
c. the whole query is interpreted at one time
d. there is no fixed sequence of interpretation, the query parser takes a decision on the fly
Hi, below may help you understanding simple subquery & correlated subquery
refer :
http://sqlmag.com/t-sql/t-sql-starters-simple-and-correlated-subqueries
a) if it is correlated subquery
A correlated subquery is one that depends on a value in the outer query. In programming terms, you pass the subroutine an argument, then the subroutine evaluates the query and returns a result. You move on to the next record and repeat the process. The
net effect is that the subquery runs once for every row in the main query; this situation is inefficient.
A possible alternative is to rewrite the correlated subquery as a join. However,
some situations require a subquery. Eg- IN(with outer table refernce)
so main query -> subquery
b) if it is simple subquery
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db and dev 10g rel2 , hi all,
i am trying to learn the "WITH CLAUSE" , and i do not see any difference between using it and using sub-queries .
when i searched for this , i found that the with clause is used when You need to reference the subquery block multiple places in the query by specifying the query name , but i can not imagine an example for doing so .
if you could provide me with an example please ? and telling me about another situations in which i could need using the "with clause" if any ?
thanks

>
db and dev 10g rel2 , hi all,
i am trying to learn the "WITH CLAUSE" , and i do not see any difference between using it and using sub-queries .
when i searched for this , i found that the with clause is used when You need to reference the subquery block multiple places in the query by specifying the query name , but i can not imagine an example for doing so .
if you could provide me with an example please ? and telling me about another situations in which i could need using the "with clause" if any ?
>
It isn't just about referencing a subquery multiple times. There are other advantages to using 'common table expressions'/'subquery factoring' also.
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Then the actual query references both query blocks just as if they are tables. And, in fact, in some circumstances Oracle will actually materialize them AS temporary tables.
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It is easy for a developer, and for Oracle, to understand what is needed for that one piece.
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Try to do THAT with a query that uses nested sub-queries.
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>
subquery_factoring_clause
The WITH query_name clause lets you assign a name to a subquery block. You can then reference the subquery block multiple places in the query by specifying the query name. Oracle Database optimizes the query by treating the query name as either an inline view or as a temporary table.
>
The SQL Language doc has an example.
http://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_10002.htm#i2129904
>
Subquery Factoring: Example The following statement creates the query names dept_costs and avg_cost for the initial query block containing a join, and then uses the query names in the body of the main query.
WITH
dept_costs AS (
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FROM employees e, departments d
WHERE e.department_id = d.department_id
GROUP BY department_name),
avg_cost AS (
SELECT SUM(dept_total)/COUNT(*) avg
FROM dept_costs)
SELECT * FROM dept_costs
WHERE dept_total >
(SELECT avg FROM avg_cost)
ORDER BY department_name;
DEPARTMENT_NAME DEPT_TOTAL
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Sub Queries VS Variables in the Query

#1
for i in ( select a.name,b.price,a.date from
list a, sales b
where a.header_id=b.header_id
and b.date_key= (select date_key from date_tab
where date_field=trunc(sydate))
loop
end loop.
#2
select date_key into v_date_key from date_tab where date_field=trunc(sydate);
for i in ( select a.name,b.price,a.date from
list a, sales b
where a.header_id=b.header_id
and b.date_key= v_date_key)
loop
end loop.
Please advice me , using the sub queries(#1) or substution variable (#2) in the condition part will improve the performance of the query.
Thanks

Most likely, there won't be a difference in performance.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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The query has multiple subqueries and it looks like
delete from node_initial_values d where d.node_id in (select c.node_id from node_master c where c.node_id=d.node_id and c.node_id in (select e.node_id from network_design e where c.node_id=e.node_id and e.network_id in (select b.network_id from network_master b where e.network_id=b.network_id and b.network_id in (select g.network_id from output_network_scenario g where g.network_id=b.network_id and g.output_network_master_id in (select a.output_network_master_id from output_network_master a where a.output_name= 'network three')))));
assume all the tables exist with correct data. the above query works perfectly well in SQL*plus but when i use
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getConn.commit();
... rest of the code
the error code oracle 8i lite gives is
java.sql.SQLException: [POL-4200] bad action for transaction operation
would really appreciate any help in this regard...
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thanks

I made the following changes:
changes to the code, new code mentioned below
changed the database to oracle 8i enterprise edition running on NT.
new code now is
// connetion parameter and other code here
String deleteNodeInitialValuesStr=
"delete from node_initial_values d where d.node_id in (select c.node_id from node_master c where c.node_id=d.node_id and c.node_id in (select e.node_id from network_design e where c.node_id=e.node_id and e.network_id in (select b.network_id from network_master b where e.network_id=b.network_id and b.network_id in (select g.network_id from output_network_scenario g where g.network_id=b.network_id and g.output_network_master_id in (select a.output_network_master_id from output_network_master a where a.output_name='"+nextElementStr+"')))))";
Statement deleteNodeInitialValuesSt=getConn.createStatement();
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getConn.commit();
} // end try
catch(SQLException ex) {
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out.println("Java SQL Exception: " + ex.getMessage()+"<br>");
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ex=ex.getNextException();
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} // end catch
// more code here
the output i get is
Java SQL Exception: 202
Vendor error code: 0
SQL State: null
I turned off getConn.commit(), but the error code remains the same. is there an alternative to the sub queries above. where can i get the meaning of the error codes thrown by the exception ?
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Hi Experts,
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IN clause with ORDER BY clause in sub-queries

Hello,
We generate dynamic queries with the following statement pattern (could be many union/intersect sub-queries):
select my_col
from my_table
where my_col IN
select table_2.my_col , x_col from table_2 where x_col > 10
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select table_2.my_col , x_col from table_2 where x_col > 10
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INTERSECT
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Thanks,
Jim

Randolf Geist wrote:
just a minor doubt - I think it is not officially supported to have separate ORDER BYs in a compound query with set operators (e.g. UNION / UNION ALL subsets). Of course one could use inline views with NO_MERGE + NO_ELIMINATE_OBY hints, but I think the only officially supported approach is to use a single, final ORDER BY (that needs to use positional notation as far as I remember).
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with v1 as (
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v2 as (
    select * from t1 where col1 = 'DEF' order by col2
select * from v1
union all
select * from v2
;A quick check the execution plan suggsts that Oracle appears to be convering this to the following - even though its technically not acceptable in normal circumstances:
select * from t1 where col1 = 'ABC' order by col2
union all
select * from t1 where col1 = 'DEF' order by col2
;Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk
To post code, statspack/AWR report, execution plans or trace files, start and end the section with the tag {noformat}{noformat} (lowercase, curly brackets, no spaces) so that the text appears in fixed format.
"Science is more than a body of knowledge; it is a way of thinking"
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Rod,
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Yes, we can export to other formats as well, but actually exporting is working, after saving the file on our local desktop/drive and when we try to open we get this kind messages or we cannot open the file, we should get message window for Macro to enable/disable but for this report we are not getting this either,
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kind regards Jan
Message was edited by:
Jan Rabe

Jan
Please can you post the full select statement and the DDL to create the tables? Or, provide someone access to the app on the Oracle server.
We can probably make these much more readable using table aliases and removing the owner unless you are doing this across schemas or via a wizard?
It looks like you are missing joins in your query - is this what you mean by subqueries? It is a good idea to move the join up before the WHERE clause if you can as this makes the query easier to manage.
Phil

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