Performance Tuning :: Function - Insert Around 900000 Records In Name_compress Table?
Apr 12, 2013
I have created below function to remove specific words/special characters from string. This function is producing expected result. Using this function i need to insert around 900000 records in name_compress table. Insert is taking around 7 mins, how we can tune this function so that insert will be executed within 1-2 mins.
Function -
CREATE OR REPLACE FUNCTION NAME_FN(IN_STRING1 VARCHAR2)
RETURN VARCHAR2 IS
V_OUTPUT VARCHAR2(300);
V_OUTPUT1 VARCHAR2(300);
V_OUTPUT2 VARCHAR2(300);
V_OUTPUT3 VARCHAR2(300);
[code]...
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Oct 31, 2011
I have two tables with 113M records in DWH_BILL_DET & 103M in prd_rerate_chg_que and Im running following merge query, which is running for 13 hrs to update records, which is quiet longer time.
SQL> explain plan for MERGE /*+ parallel (rq, 16) */
INTO DWH_BILL_DET rq
USING (SELECT rated_que_rowid,
detail_rerate_flag_code,
rerate_sel_key,
[code].....
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Aug 3, 2010
I am using one script to delete the records from a table, its taking 1hr to delete.
declare
cursor c1 is select ownerid,ownertype from nightly_metric_projects
;
v1 c1%rowtype;
open c1;
loop
fetch c1 into v1;
exit when c1%notfound;
DELETE FROM DGT_ITEMEFFORTDATA WHERE OWNERTYPE = c1.OWNERTYPE
AND OWNERID = c1.OWNERID;
end loop;
close c1;
commit;
nightly_metric_projects--1200 records
DGT_ITEMEFFORTDATA--13200000
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Sep 23, 2010
When i run a script that does a select from a single table (table has 33521868 records)the query is executed in about .094 seconds. I use the exact same query to insert into a temporary table and the query takes 10 minutes and more.
What should I be doing to speed up this process. Also tried using hints and it does not speed up the insert.
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Oct 15, 2013
I am inserting data using a procedure for 2012 and 2013 year which is using partitioned tables includes crore of data in a partition taking lot of time or taking months. Is there any other way by which I can insert data fast from our query.
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Aug 10, 2011
I am looking at an existing utility which inserts data into configuration tables. The utility is fairly basic, you simply add the UPDATE / INSERT / DELETE sql commands to a .sql file, set up a few params in a .sh script in order to tell it which Database / Schema to run against and away it goes, doing some logging, etc on the way.
Most of the time this is fine. However there is one table that causes big performance problems. This large table holds rating data and it has two large triggers on it. It also gets updated quite a bit with new rating tariffs.
The triggers check that many fields are not null or are certain values... but they also check that dates of the rates do no overlap, etc. So, in short, they do a lot of work. I can see that these are the main performance obstacle. I have no ability to alter or disable these triggers, this is a core table supplied by the vendor and as such I cannot manipulate it.
So looking at the things I can change, what am I left with?... only the way I load the data..
I can consider using SQLloader in order to handle INSERTS or using the APPEND hint in order to perform a direct path insert rather than having individual INSERT statements.
I can try to ensure that my data is sorted along the same lines as the index on the table in order to ensure that I am updating the index nodes in as streamlined way as possible. I can improve performance still more, or even circumnavigate the drag of the triggers?
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Mar 23, 2012
we are using oracle 9i on AIX Server. When Customer were accessing the database, accidentally power was shut down. we restarted the Server,and Oracle database. all resumed successfully.
However while doing "Payments by the customer" it takes a lot of time to insert even a single payment record on database.The database is Live and our customer are very much frustrated,
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Jul 8, 2010
My query formation is like below..
*Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bi*
SELECT T1.COL1,T1.COL2,
T1.COL3,T2.COL2,
T3.COL1,T3.COL2,
T4.COL1,T4.COL3,
<CASE statements and calculations results - Some Amount1>,
<CASE statements and calculations results - Some Amount2>
[code]..........
First I need to display all the records from TAB_ONE which contains more than 10million records. If you see there are columns like AMOUNT_ONE,AMOUNT_TWO which has got some complex calculations and that is based on some other calculations and which in turn and goes on.... Like this I have some ten amount columns. Finally these records has to be inserted into a new table.
To get this I have written nested inline queries to calculate these AMOUNT columns but since considering the huge amount of records, it takes more than 8 hours for inserting this into a new table.
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Jun 12, 2010
I have a table with:
1 million rows
average row length 200 bytes
50 columns
and this update statement
UPDATE mytable SET varchar2_4000_column = replace(replace(replace...300 times)
It looks at every row in the table (no WHERE clause) and does these 300 replace operations on this column for each row. Each replace replaces with a null so effectively it is removing strings. Much of the time these strings are not in the column.
This update statement takes 25 minutes and it is 98% CPU and 2% USER_IO time.
I figure that is what is taking all the time since it is a CPU bound statement. if rows in this table are persistent over time then tag rows with a flag to show which ones have already been processed and skip these next time around.
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May 24, 2011
I am stuck with a query which is taking a lot of time to execute. Below is the pseudo code of the same:
SELECT TAB_ALIAS1.COL1,TAB_ALIAS1.COL2,TAB_ALIAS1.COL3
FROM TABLE1 TAB_ALIAS1
WHERE TAB_ALIAS1.COL4 = <INPUT PARAMETER1>
AND TRUNC(TAB_ALIAS1.ELAP_TIME) =
(
SELECT MAX(ELAP_TIME)
[code]....
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Feb 22, 2012
I have a table which has 4M records
This table has a query where one of the condition is
AND STATUS <> 'C'
Now the data is as following
select count(*) record_count, status from new_business group by status;
record_countstatus
4298025C
15N
13Q
122S
I want to know if following index would be useful in this case while the condition in where clause is
"AND STATUS <> 'C'"
create index nb_index_1 on new_business(case when status in('N','Q','S') then 1 else NULL end);
Or
create index nb_index_1 on new_business(case when status ='N' then 'N' when status='Q' then 'Q' when status='S' then 'S' else NULL end);
I tried it on a sample table but the index is simply not picked up even when hinted following are the db level settings
query_rewrite_enabled string TRUE
query_rewrite_integrity string enforced
I tried it 'query_rewrite_integrity' with 'trusted' as well .
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Dec 8, 2010
There is a table in Database with millions of records and a query --- Select rowid, ANI, DNIS, message from tbl_sms_talkies where rownum<=:"SYS_B_0" ---- using the high CPU and also this query having high number of executions.
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Mar 11, 2013
Ways for improving the Table performance which holds million of records for oracle. Currently we have partitioning and indexing but it doesn't seem to work.
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Mar 9, 2012
I have a question regrading how oracle fetches record in case of partitioning...
we have a table of nearly 6 crores of records.. that table has several columns among which the DBA has given the range partition on COL1 and hash subpartition on COL2...
CREATE TABLE ORDER_BOOK
(CUST_ID NUMBER(10),
ORDER_DATE DATE,
...........,
...........,
...........)
PARTITION BY RANGE (CUST_ID)
SUBPARTITION BY HASH (ORDER_DATE)
[code]........
I want to know how the rows will get organised in the tablespaces...the DBA didn't mention any tablespace name in the main partition and he has mentioned the tablespace names only in the subpartition template. so how the records will get organised.
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Jul 24, 2013
determine if a function is worth pinning in memory? I want to come up with a percentage, implying that if the function is already im memory 80%+ of the time then it is not worth it.
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Aug 10, 2011
when am trying to use nvl for one condition it is taking lot of time to execute but when am removing nvl function then the query executing in 2 min. condition is given below
(HOI2.ORG_INFORMATION1)=nvl(TO_CHAR(:p_set_of_books_id) , HOI2.ORG_INFORMATION1)
but when am using the same condition as below the querry executing in 2 min
(HOI2.ORG_INFORMATION1)=TO_CHAR(:p_set_of_books_id)
my query given below
(SELECT cust.customer_number cust_no, cust.customer_name customer,
cnv.item_no, SUM(wd.shipped_quantity) shp_qty_nos,
0 rtn_qty_nos,
ROUND(SUM(cnv.cnf * wd.shipped_quantity), 3) shp_qty_tons,
0 rtn_qty_tons, 0 net_shp_qty_nos, 0 net_shp_qty_tons
[code]...
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Jul 17, 2013
Oracle 11gI have a large table of 125 million records - t3_universe. This table never gets updated or altered once loaded, but holds data that we receive from a lead company. I need to select records from this large table that fit certain demographic criteria and insert those into a smaller table - T3_Leads - that will be updated with regard to when the lead is mailed and for other relevant information. select records from this 125 million record table to insert into the smaller table.
I have tried a variety of things - views, materialized views, direct insert into smaller table...I think I am probably missing other approaches. My current attempt has been to create a View using the query that selects the records as shown below. Then use a second query that inserts into T3_Leads from this View V_Market. This is very slow. Can I just use an Insert Into T3_Leads with this query - it did not seem to work with the WITH clause? My Index on the large table is t3_universe_composite and includes zip_code, address_key, household_key.
CREATE VIEW V_Market asWITH got_pairs AS ( SELECT /*+ INDEX_FFS(t3_universe t3_universe_composite) */ l.zip_code, l.zip_plus_4, l.p1_givenname, l.surname, l.address, l.city, l.state, l.household_key, l.hh_type as l_hh_type, l.address_key, l.narrowband_income, l.p1_ms, l.p1_gender, l.p1_exact_age, l.p1_personkey, e.hh_type as filler_data, 1.p1_seq_no, l.p2_seq_no , ROW_NUMBER () OVER ( PARTITION BY l.address_key ORDER BY l.hh_verification_date DESC ) AS r_num FROM t3_universe e JOIN t3_universe l ON l.address_key = e.address_key AND l.zip_code = e.zip_code AND l.p1_gender != e.p1_gender
[code]....
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Jul 18, 2012
I want to insert 10 records from table a to table b. If i m using statement level trigger how many record insert?In row level trigger how many record inserted?
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Mar 25, 2013
following is the requirement
External Table
WKSHT_FILE_EXT
wksht_line
Export Table
Wksht_export
global_idvarchar2(10)
wksht_linevarchar2(250)
[code]....
Step 1.Insert all records from the external table into the export table. Truncate the export table first
Step 2.Read in a record from the export map table
Step 3.Search through export table records looking for the key words BRANCH =. Compare the branch code with the branch code form the map table
Step 4.If a match is found mark all records in the export table for the worksheet with the global ID from the export map table as follows..The first line of a worksheet is marked by the words WKSHTS..The last line of the work sheet is marked by the words COMPANY CONFIDENTIAL..We will need to capture the line break so also mark the next line after the COMPANY CONFIDENTIAL line
Step 5.Continue with Steps 2 - 4 until all records have been processed from the export map table.
first I have to create a procedure ti insert data from external table to export table.Global id will be blank.it will be updated by the mapping table's Global Id when The EB COLUMN's data(i.e 8p,2Betc ) will match with the BRANC=NA,2Betc of the datasheet loaded from the external table.. FOLLOWING IS THE SAMPLE DATASHEET
WKSHTS AAAAA BBBBBBBBBBB ELECTRONICS INC. TIME REPORT-DATE PAGE
SORT - BR, SLSREP AEC FIELD SALES REPRESENTATIVE 16:14 09/21/12 1
BRANCH = 2B
EMPLOYEE NAME SALVAAG, GREGG Days in the Month 28
[code]....
THERE ARE 2 pages..I have to split this LONG REPORT STORED IN WKSHT_LINE COLUMN OF EXPORT TABLE to 2 records..like wise 500 pages are there means 500 records.. AND THEN FIND BRANCH= after that which two words will come i.e NA,2B etc if it will MATCH WITH MAPPING TABLE"S EB COLUMN"S DATA,THEN MAPPING TABLE's GLOBAL ID WILL BE UPDATED TO EXPORT TABLE's GLOBAL ID WHICH IS BLANK
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Feb 1, 2013
I need to insert 999999 records into one table, Already I wrote the below query
DECLARE
TYPE tt_type IS TABLE OF table_name.no%TYPE
INDEX BY BINARY_INTEGER;
tt_type_no tt_type;
rec_count NUMBER;
BEGIN
[code]...
But It took 5 mins to execute... Is there any other way there to insert fastly.
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Jul 18, 2013
Insert multiple record in table. I have a table of customers . It has column cus_name, cus_fruit, cus_date, cus_qty.
Select * from customers;
cus_name cus_fruit cus_date cus_qty
Maria Anders Apple 18-July-2013 10
Maria Anders Apricot 18-July-2013 20
Maria Anders Asparagus 18-July-2013 100
Maria Anders Avocado 18-July-2013 5
Ana Trujillo Apple 18-July-2013 10
Ana Trujillo Apricot 18-July-2013 20
Ana Trujillo Asparagus 18-July-2013 100
Ana Trujillo Avocado 18-July-2013 5
how I can insert record in one time in table. All table data same only change the cus_name.
Thomas Hardy Apple 18-July-2013 10
Thomas Hardy Apricot 18-July-2013 20
Thomas Hardy Asparagus 18-July-2013 100
Thomas Hardy Avocado 18-July-2013 5
After Insert record result.
Select * from customers;
cus_name cus_fruit cus_date cus_qty
Maria Anders Apple 18-July-2013 10
Maria Anders Apricot 18-July-2013 20
Maria Anders Asparagus 18-July-2013 100
Maria Anders Avocado 18-July-2013 5
Ana Trujillo Apple 18-July-2013 10
Ana Trujillo Apricot 18-July-2013 20
Ana Trujillo Asparagus 18-July-2013 100
Ana Trujillo Avocado 18-July-2013 5
Thomas Hardy Apple 18-July-2013 10
Thomas Hardy Apricot 18-July-2013 20
Thomas Hardy Asparagus 18-July-2013 100
Thomas Hardy Avocado 18-July-2013 5
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Aug 13, 2013
I want to know how we can insert more than 3 million records from one table to another table. Can we use Bulk collect and forall to insert the all data.Can we use create table tableB as select * from tableA; From the above which is one is performance wise good.
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Dec 21, 2012
I am trying to insert rec into target table if those rec are not existing and trying to update those rec if they already exists from three source tables.I had seen in posts that merge cannot be used with cursor.
SQL> create or replace
2 PACKAGE sis_l_cpl_sis_reb_pgm_hist_pkg
3 IS
4 /********************************************************************
******************
5 PACKAGE: sis_load_cpl_sis_reb_pgm_hist
6 PURPOSE: Load CMPLY_SIS_REB_PGM_HIST with data from cmply_sis_p
h_dtl,cmply_sis_sls_dtl,
7 cmply_sis_excl_dtl(intial load)
8 *********************************************************************
******************/
[code].......
Package created.
SQL> create or replace
2 PACKAGE BODY
sis_l_cpl_sis_reb_pgm_hist_pkg
3 IS
4 /**********************************************************************
******************
5 PACKAGE: sis_l_cpl_sis_reb_pgm_hist_pkg
6 PURPOSE: Load CMPLY_SIS_REB_PGM_HIST with data from cmply_sis_pur
h_dtl,cmply_sis_sls_dtl,
7 cmply_sis_excl_dtl(intial load)
[code].......
Warning: Package Body created with compilation errors.
SQL> sho err
Errors for PACKAGE BODY SIS_L_CPL_SIS_REB_PGM_HIST_PKG:
LINE/COL ERROR
-------- -----------------------------------------------------------------
67/7 PL/SQL: SQL Statement ignored
75/19 PL/SQL: ORA-00926: missing VALUES keyword
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Mar 9, 2004
Trying to auto insert the newest records from one table into another Table. I have a vendor provided table that is part of my database (running Oracle 9i) so I can't change the underlying structure to it or their process stops fluxing. However, I can add a trigger to it. What I want to do is this:
When the vendor's software inserts a new row (through their own automated process) I want to insert data from that same new record into another table of my own. (where of course I can re-format it, etc., and make the data my own)
The original vendor table does not have a insertion timestamp field to work off of.What is the best way to trigger an insert off the latest inserted record? It works to replace all the records in the entire vendor table but I only want to insert one record at a time.
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Mar 21, 2013
We are trying insert records from a select query into temporary table, some of the records is missing in the temporary table. The select statement is having multiple joins and union all which it little complex query. In simple terms the script contains 2 part 1st Part Insert in to temporary table 2nd part Select query with multiple joins, inline sub queries, unions and group by classes and conditions Eg. If we execute select statement alone it returns some count for example => 60000 After inserting into the temp table, in temp table the count is around 42000 why is the difference?
It is simple bulk inserts... insert in to temp table select * from xxx. also, there is no commit in between. The problem is all the records populated by the select statement are not inserted in to temp table. some records are not inserted.
Also, we had some other observation. It only happens in its 2nd execution and not its first run. Hope there might be some cache problem Even, we also did not believe that. We are wondering. In TOAD, we tested however at times it happens. In application jar file, after "insert in to temp select * from xxx" we take the i. record count of temp table and ii. record count of "select * from xxx" separately but both doesn't match. Match only at 1st time.
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Feb 6, 2011
I am trying to update columns of Table A with the columns of Table B. Both these tables have 60,000 rows each. I tried this operation using following 2 queries:
Query 1
Update TableA A
set
(A.col1,A.col2,A.col3)=(select B.col1,B.col2,B.col3
from TableB
where A.CODE=B.CODE)
Query 2
Update TableA A
set
(A.col1,A.col2,A.col3)=(select B.col1,B.col2,B.col3
from TableB
where A.CODE=B.CODE)
where exists
A.code = (select B.code
from TableB B
where A.code=B.code)
When i execute these two above queries, it keeps executing indefinitely.
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Jul 13, 2012
On a Oracle 11g R2 I've a table function ( PIPELINED ) returning rows selected from a table.The first time the function is selected, in a session ( I've tried to disconnect and log in again ), it returns no rows.I've tried to log the call using DBMS_OUTPUT and from what I see the select on the table function returns no rows and no output is printed. So I presume Oracle is not calling the function.
The same function on a similar environment ( same db versions, patches and database structure ) works fine. The second environment is a production environment so it has more memory and some other settings enabled.
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Sep 30, 2010
I'm trying to insert records of one table into another using the insert into table with select logic.
I'm trying to convert a two character value using CASE statement:
CASE REC_TYPE
WHEN '00' THEN to_number('0')
ELSE to_number('1')
END "REC_TYPE"
The target field is defined as number(1,0) and the source field is varchar2(2).
I keep getting an ORA-01861 literal does not match format string error.
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Jun 24, 2011
Below query is taking a long time...
select gam.SOL_ID,COUNT(gam.FORACID) from gam,smt where
gam.ACID=smt.ACID and gam.ACID NOT IN(select ACID from imt) and
gam.SCHM_TYPE in('SBA','CCA','CAA','ODA') and GAM.ACCT_CLS_FLG='N' and
gam.SOL_ID IN(select SOL_ID from IMT) group by gam.SOL_ID
/
attached is the explain plan.
in which index on IMT table is not used. And the query is doing a FTS on IMT table. What needs to be done to avoid FTS on IMT table.
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Jun 28, 2010
What are the factors that decide on which column we should partition the table and which partition method we should chose.
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