SQL Query Issues
Friends,
We are running ORACLE 11g in Unix enviornment. Every week, our application run a flow from application, its run a query everytime and its not use the right index due to this its take lot of time. I want to set in database, its use everytime our mention index and does not change execution plan. Any ideas?
Regards,
Irfan Ahmad
Hi
Use a sql profile. You can have a hint to you the index so when application use the sql statement it will start using the sql statement with index hint .
DECLARE
test_task_name VARCHAR2(30);
test_sqltext CLOB;
BEGIN
test_sqltext := 'SELECT /*+ index(XX <your index name>) */ * from < your table> XX where co1=''yyyy'')';
test_task_name := DBMS_SQLTUNE.CREATE_TUNING_TASK(
sql_text => test_sqltext,
user_name => '<your schema name>',
scope => 'COMPREHENSIVE',
time_limit => 60,
task_name => 'test_sql_tuning_task_2',
description => 'Test Task to tune a query');
END;
BEGIN
DBMS_SQLTUNE.EXECUTE_TUNING_TASK( task_name => 'test_sql_tuning_task_2');
end;
Check the oracle support document 271196.1 for further clarification
Cheers
Kanchana.
Edited by: Kanchana Devasurendra on Nov 1, 2010 3:47 PM
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I have come into situation where we are pruning sql queries on different DB version of Oracle and have performance issue. Let me tell you in brief and i really appreciate for your prompt response as its very imperative stuff.
I have a query which is running on a DB of version 7.3.4 and it takes around 30 mins where as the same query when run on 8i it takes 15sec., its a huge difference. I have run the statistics to analyze on 7.3 and its comparatively very high. Question here is, the sql query trys to select data from same schema table and 2 tables from another DB using DB link and 2 other tables from another DB using DB link.So,how can we optimize this stuff and achieve this run as same time as 8i DB in 7.3. Hope i am clear about my question, Eagerly waiting for your replies.
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Message was edited by:
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department
from t
order by 3,
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B.See this wiki on how to troubleshoot issues with CR and datasets:
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- Ludek
Senior Support Engineer AGS Product Support, Global Support Center
Canada
Follow us on Twitter -
I am trying to use a method to query a database to gather a person's name when the Social Security Number is entered. However in the display, it seems to only bring back the field that you use to compare in the load statement. Can anyone tell me what I am doing wrong? The below example will bring back the SSN but if I change the last line in the example to HISTORY.fullName I get a "Null Value" returned back. Thanks.
input "Social Security Number of Employee to terminate: " : intSSN
//intSSN is a local variable
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returning selectedButton = selection
//pg 310 of Fuego 5.5 document
//Database name is HISTORY, local variable is ssn, seems to only only display what is in load
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load BpmDB.Dbo.HISTORY using ssn = intSSN
display HISTORY.ssnload BpmDB.Dbo.HISTORY using ssn = intSSN
display HISTORY.ssnTry doing:
load BpmDB.Dbo.HISTORY using ssn = intSSN
display HISTORY //Note the difference, we're asking for the whole object,
not just the ssn
Juan
On Thu, 07 Sep 2006 13:52:39 -0300, Ben Sfanos wrote:
I am trying to use a method to query a database to gather a person's
name when the Social Security Number is entered. However in the
display, it seems to only bring back the field that you use to compare
in the load statement. Can anyone tell me what I am doing wrong? The
below example will bring back the SSN but if I change the last line in
the example to HISTORY.fullName I get a "Null Value" returned back.
Thanks.
input "Social Security Number of Employee to terminate: " : intSSN
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Hi All,
I am using oracle 10g. I need urgent help in finding difference in records based on date:
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salesman SALES_COUNT DATE
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from t
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I think I'm being really stupid but I'm having SQL query issues.
I have a table with lots of lines of transactions which all refer to different stores, for example:
Store..............._Sales_............._Month_
Reading............200k..............April
Leeds...............50k................April
Manchester........70k................May
Reading............100k..............May
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Thank you,Hello,
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from dual
union
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, 70
from dual
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, 100
from dual
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, sum(sales)/count(distinct store)
from dataThere are multiple options:
1. You can get two IR's on one page (by using IFRAMEs - search for that word on the Forum)....
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Greetings,
Roel
http://roelhartman.blogspot.com/
http://www.bloggingaboutoracle.org/
http://www.logica.com/
You can award this reply to your question by marking it as either Helpful or Correct ;-) -
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When I try to view data after creating the data set, I get the following error:
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So I know it is the PV that's causing this error.
How can I work around it?
There is no way to create equivalent report without using the direct sql..
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is not because different PowerQuery versions as mentioned above. When designing the query in PowerQuery in Excel make sure to use the interface/navigation to create the query/select tables and NOT a SQL statement. The SQL statement as source works fine on
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//Jonas -
Hi,
Facing Database performance issue while runing overnight batches.
Generate tfprof output for that batch and found some sql query which is having high elapsed time. Could any one please let me know what is the issue for this. It will also be great help if anyone suggest what need to be done as per tuning of this sql queries so as to get better responce time.
Waiting for your reply.
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TRANS_PRD_CHILD, TRANS_TRN_CODE, TRANS_TYPE_CODE, TRANS_DATE, INV_MRPT_CODE,
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VALUES
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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
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