SQL Query execution with LISTAGG

Hello,
I am trying to get some data using LISTAGG functionality.
I have below query with works fine with the table, but not with the rowsource which is based on same table.
SELECT COL1,LISTAGG(COL3, ',') WITHIN GROUP (ORDER BY COL2) AS fieldName FROM IOP_Sample_RS GROUP BY COL1it gives parsing error
line 1:22: expecting "FROM", found '('col 22 is '(' of LISTAGG function.
One more Question
Does UNION, MINUS works with RSQL in IOP?
Thanks,
Sumant Chhunchha.
Edited by: Sumant on Jun 15, 2011 5:04 AM

LISTAGG, UNION, MINUS is not supported with RSQL, instead you can massage your SQL query to load data into IOP and then use a simple RSQL query.

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Hi Fei,
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Even I tried copyfromrecordset, getrows(), getstring(), Looping each recordset fields options all of them taking same amount of time. Appreciate any inputs...
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Hi Fei,
Thank you so much for the reply post. I just executed the same above SQL without INTO Statement and assigned the SQL result to ADODB recordset as below. If the time difference is due to the SQL query then below statements also should execute for hours
right, but it gets executed in seconds. But to copy the recordset to excel again it is taking hours. I tried copyfromrecordset,
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Even I tried to typecast all columns to double, string in SQL and still the execution time is not reduced.
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Added Oracle Version

So, is it something like this you want?
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Wrote file afiedt.buf
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Hi,
Is there any way to get the exact time of execution of particular SQL query.
Oracle Version : 10.2.0.4.0
OS : Sun OS.
Thx,
Gowin.

In general it's pretty hard.
Look at V$SQLSTAT.ELAPSED_TIME and DBA_HIST_SQLSTAT.ELAPSED_TIME_TOTAL/DELTA (need a license).
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Edited by: Max Seleznev on Nov 4, 2011 12:06 PM

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     90          *
R     80          *
u     70          *
n     60          *
s     50          *
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     30          *                                             *
     20          *                                        *     *     *
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R     80
u     70
n     60
s     50
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-connection differences (using single pooled connection)
-garbage collection (collection spikes independent of query execution times)
-amount of data returned in bytes (single varchar2 returned and size is independent of execution time)
-driver differences (thin and oci compared, overall times differ but pattern of clustering remains)
-differences between Statement and PreparedStatement usage (both show same pattern)
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DB-side file I/O?
Thread time-slicing variations (client or DB-side)?
FWIW, the DB is 9.2.0.3 DB and the clients are running on WinXP with Java 5.0 and 9i drivers.
Thanks and regards,
M

Further context:
Are your queries only SELECT queries ?
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Optimizer goal: CHOOSE
UPDATE /*+ ROWID(TRFDTLEE) */TRFDTLEE SET TRF_STATUS = :B2
WHERE
ROWID = :B1
call count cpu elapsed disk query current rows
Parse 635 0.03 0.01 0 0 0 0
Execute 49902 14.48 271.25 41803 80704 355837 49902
Fetch 0 0.00 0.00 0 0 0 0
total 50537 14.51 271.27 41803 80704 355837 49902
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
DECLARE
var_trans_session     invtrnee.trans_session%TYPE;
BEGIN
-- ADDED BY SHANKAR ON 08/29/97
-- GET THE NEXT AVAILABLE TRANS_SESSION
bastkey('trans_session',0,var_trans_session,'T');
-- MAS001
uk_trfbapuo_auto(var_trans_session,'UPLOAD','T',300);
-- MAS001 end
END;
call count cpu elapsed disk query current rows
Parse 0 0.00 0.00 0 0 0 0
Execute 1 24191.23 24028.57 8172196 10533885 187888 1
Fetch 0 0.00 0.00 0 0 0 0
total 1 24191.23 24028.57 8172196 10533885 187888 1
Misses in library cache during parse: 0
Misses in library cache during execute: 1
Optimizer goal: CHOOSE
SELECT INNER_PK_TECH_KEY
FROM
PRDPCDEE WHERE PRD_LVL_CHILD = :B1 AND LOOSE_PACK_FLAG = 'T'
call count cpu elapsed disk query current rows
Parse 1 0.01 0.00 0 0 0 0
Execute 56081 1.90 2.03 0 0 0 0
Fetch 56081 11.07 458.58 53792 246017 0 56081
total 112163 12.98 460.61 53792 246017 0 56081
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
******************

First off, be aware of the assumptions I'm making. The SQL you presented above strongly suggests (to me at least) that you have cursor for loops. If that's the case, you need to review what their purpose is and look to convert them into single statement DML commands. For example if you have something like this
DECLARE
    ln_Count        NUMBER;
    ln_SomeValue    NUMBER;
BEGIN
    FOR lcr_Row IN (    SELECT pk_id,col1,col2 FROM some_table)
    LOOP
        SELECT
            COUNT(*)
        INTO
            ln_COunt
        FROM
            target_table
        WHERE
            pk_id = lcr_Row.pk_id;
        IF ln_Count = 0 THEN
            SELECT
                some_value
            INTO
                ln_SomeValue
            FROM
                some_other_table
            WHERE
                pk_id = lcr_Row.col1
            INSERT
            INTO
                target_table
                (   pk_id,
                    some_other_value,
                    col2
            VALUES
                (   lcr_Row.col1,
                    ln_SomeValue,
                    lcr_Row.col2
        ELSE
            UPDATE
                target_table
            SET
                some_other_value = ln_SomeValue
            WHERE
                pk_id = lcr_Row.col1;
        END IF;
    END LOOP;
END;                            it could be rewritten as
DECLARE
BEGIN
    MERGE INTO target_table b
    USING ( SELECT
                a.pk_id,
                a.col2,
                b.some_value
            FROM
                some_table a,
                some_other_table b
            WHERE
                b.pk_id = a.col1
           ) e
    ON (b.pk_id = e.pk_id)
    WHEN MATCHED THEN
      UPDATE SET b.some_other_value = e.some_value
    WHEN NOT MATCHED THEN
      INSERT ( b.pk_id,
                b.col2,
                b.some_other_value)
      VALUES(   b.pk_id,
                b.col2,
                b.some_value);
END;It's going to take a bit of analysis and work but the fastest and most scalable way to approach processing data is to use SQL rather than PL/SQL. PL/SQL data processing i.e. cursor loops should be an option of last resort.
HTH
David

ORA-06502 on 'SQL query' report with sort in 'Report Attributes'

Hi All,
We get the next error if we set sorting on a column in a 'Report' based on a 'SQL query'. Removing the sort, error disappeares:
failed to parse SQL query:
ORA-06502: PL/SQL: numeric or value error: NULL index table key value
Any suggestions?
Erik

Erik,
Thanks, this explains it. By specifying the request as part of your URL you run into the recently uncovered issue. The request you're setting is REMFROMLIST and ADD2LIST. You probably either have links that include those requests or you have branches where you specify them. Either way, in order to get reports sorting to work, you'll have to make sure that the request strings are not part of your URL. This is a work-around and the upcoming HTML DB patch release will solve this issue.
One way of avoiding this is to have computations on the previous pages that set a napplication level or page level item to the REMFROMLIST and ADD2LIST values and then you can use those items for your conditions that are currently evaluating those strings.
Hope this helps and sorry for the inconvenience,
Marc

Sql query execution in jsp

can u help me to print multiple rows resulted from a sql query using jsp.

Map the ResultSet to a Collection of DTO's, use the JSTL's c:forEach tag to iterate through it inside a JSP page, use the HTML table, tr and td elements to present the data in a table.

SQL query problem with sorting

Hi,
I have question regarding sql query . Right now I am getting the results like this if i use this sql query
select ID,Name,Desc,Priority from emp order by Priority ;
Priority is varchar field. I don't want to change the Priority field and cannot add a new column in the table. Because i don't have permission to do that.
ID Name Desc Priority
=============================================
234 paul paul desc Highest
3452 mike mike desc High
4342 smith smith desc Low
6565 kelly kelly desc Low
9878 nate nate desc Medium
3223 deb deb desc High
============================================
I need a query to get the results like that.
ID Name Desc Priority
=============================================
234 paul paul desc Highest
3452 mike mike desc High
3223 deb deb desc High
9878 nate nate desc Medium
4342 smith smith desc Low
6565 kelly kelly desc Low
============================================
If any one knows about this one, please let me know.
Thanks,
Bala

You are aware that there are differences in the SQL implementation between Sqlserver and Oracle? You could try something like this, if there's a INSTR function:
ORDER BY INSTR('Highest,High,Medium,Low,', Priority || ',')You may have to change the "Priority || ," to a "Priority + ','), if string concatenation is done differently in sqlserver. Don't know about the ('), maybe you need (").
C.

SQL Query execution with LISTAGG

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