Performance Tuning :: Update Currency Column Of One Table Using Other Table Currency Column?
May 11, 2012
I am trying to update currency column of one table using the currency column of other table using the following sql code.
update ODS.SO_ITEM OSI
set CURRENCY__CODE=(select currency__code from sa_sales.SO_ITEM SSI where SSI.ID=OSI.ID)
This update is taking taking a lot of time and is never ending.
should i create index on source table (SA_SALES.SO_ITEM) or on target table (ODS.SO_ITEM) ?
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May 21, 2013
I am facing some challenge while running update query on newly added column in existing table.
Environment Details
Oracle 9i, version 9.2.0.6
Os Unix Aix 6.1
No of records in table : 12572770
Below are the step i followed.
1. In table testtablename, I have added new column COLUMNNAME29 with datatype VARCHAR2(8).
2. After adding the new column, i executed the update query to populate the data form COLUMNNAME1 to COLUMNNAME29.
3. The query is executed using COLUMNNAME24 in where clause, to drive query in index based.
SQL> desc testtablename
Name Null? Type
----------------------------------------- -------- ----------------------------
COLUMNNAME1 VARCHAR2(8)
COLUMNNAME2 CHAR(1)
COLUMNNAME3 CHAR(1)
COLUMNNAME4 VARCHAR2(8)
COLUMNNAME5 VARCHAR2(11)
[Code]...
Table altered.
SQL> select index_name, column_position, column_name from dba_ind_columns where table_name = 'TESTTABLENAME' order by index_name,column_position;
INDEX_NAME COLUMN_POSITION COLUMN_NAME
------------------------------ --------------- --------------------------------------------------
IDX_TESTTABLENAME 1 COLUMNNAME24
Problem faced & My analysis
1. The update query is hanging in database, it's not progressing (In single update, approximately 40000 records will get update)
2. No oracle error thrown in alert log or in session where the query being executed.
3. The event for the query is "db file sequential read".
4. When i update the newly added column COLUMNNAME29 with static value "1", the update completed successfully in few seconds.
5. Then i changed the static value to "1111" and executed the update statement, which result to query hanging in database.
6. I tried to update the existing column(COLUMNNAME1) in table with static value "1111", the update completed successfully.
Below are the queries completed successfully
Update Testtablename
Set Columnname29 = '1'
Where Columnname24 >= To_Date('01-12-2002 00:00:00', 'DD-MM-YYYY HH24:MI:SS' )
And Columnname24 < To_Date('01-01-2003 00:00:00', 'DD-MM-YYYY HH24:MI:SS')
[Code]...
Below are the queries hanging in database
Update Testtablename
Set Columnname29 = Columnname1
Where Columnname24 >= To_Date('01-12-2002 00:00:00', 'DD-MM-YYYY HH24:MI:SS' )
And Columnname24 < To_Date('01-01-2003 00:00:00', 'DD-MM-YYYY HH24:MI:SS')
Update Testtablename
Set Columnname29 = '1111'
Where Columnname24 >= To_Date('01-12-2002 00:00:00', 'DD-MM-YYYY HH24:MI:SS' )
And Columnname24 < To_Date('01-01-2003 00:00:00', 'DD-MM-YYYY HH24:MI:SS')
Below is character set in database
SQL> select * from v$nls_parameters;
PARAMETER VALUE
---------------------------------------------------------------- ----------------------------------------------------------------
NLS_LANGUAGE AMERICAN
NLS_TERRITORY AMERICA
NLS_CURRENCY $
NLS_ISO_CURRENCY AMERICA
[Code]....
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Nov 3, 2010
the reason behind the below statements:
1) We cant create TABLE PARTITIONED on CLUSTER or INDEX on CLUSTER TABLE.
2) We cant create a partitioned table with the column of LONG or LONGRAW? (But how it could be possible with BLOB, CLOB?
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Apr 8, 2013
I want to display currency Rupee(Indian Currency) symbol in salary.
I am getting only $ symbol.
how to do it.
tell the process.
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Apr 27, 2012
I need to implement the Currency Conversion logic in SQL to create a view.
Sample data
Acount Table
Accno Amt Crncy_id
--------------------
101 1000 1
102 500 2
103 500 2
104 500 3
107 500 4
.
.
.
Currency Table
Crncy_id Crncy_nm
-------------------------
1 INR
2 USD
3 GBP
4 EUR
My local currency is INR, I need to write a query to convert the foreign currency to loacl currency INR.In my case i need to write aSQL for a view.It should not implement through PL/SQL
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Jun 8, 2010
How the use the system parameter as currency, decimal and thousand.
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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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Sep 18, 2012
How can i apply currency format to the select list values queried from database tables. The data is stored in database in number format. The user wants to see 1000 separator commas in the list item values.
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Feb 15, 2011
I am trying to update a million rows in one table with the values from another tables.
Table being updated CI_ADJ_CHAR column CHAR_VAL_FK1
Table from which values will be used CK_ADJ columns (cx_id, ci_id)
The CI_ADJ_CHAR.CHAR_VAL_FK1 values match CK_ADJ.CX_ID and should be updated with the value CK_ADJ.CI_ID.
The CK_ADJ table has 1.3 million rows and both the columns have indexes defined. Table definitiuon mentioned below
The CI_ADJ_CHAR table has 14 million rows and will update 1 million rows and has an index on the ADJ_ID column but not on the CHAR_VAL_FK1 column.
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Oct 22, 2010
I have a table ITEM as under;
ARTICLE VRTCODENAMESTATUSNEW_NAME
4KABAN.NM.12.21121143SU19I
4KABAN.NM.12.21564101SU23I
4KABAN.NM.24,5.22491015SR08I
4KABAN.NM.24,5.23181038SR22I
4KABAN.NM.24,5.23491015SR08I
4KABAN.NM.24,5.24121161SR26I
how to update the filed from NAME to NEW_NAME, I need following output.
ARTICLE VRTCODENAMESTATUSNEW_NAME
4KABAN.NM.12.21121143SU19ISU19
4KABAN.NM.12.21564101SU23ISU23
4KABAN.NM.24,5.22491015SR08ISR08
4KABAN.NM.24,5.23181038SR22ISR22
4KABAN.NM.24,5.23491015SR08ISR08
4KABAN.NM.24,5.24121161SR26ISR26
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Feb 21, 2011
How to update a CLOB column in a table, suppose the string is greater than 4000 size.
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Feb 21, 2012
CREATE TABLE TEST
(
NAME VARCHAR2(1000 BYTE),
ID NUMBER
)
[Code]...
I want the update the TEST table with TEST1 based on id column,i tried as like.it's not working..
UPDATE test t1
SET t1.ID = ( select ID from test1 t2
where t1.name = t2.email and rownum=1 )
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May 26, 2011
i have a table in my PD database which have more than 30,000 records .some records in a column say p_code is not tagged with code like '9876543'while other records are tagged in this column with code such as '19022345678'.
Now i want to update these records with tagging 1902 with each one .
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Apr 14, 2012
I have a table PR in that some data is there for instance, My Mr_NO was Char(11) I modify MR_No to Char(13)My Table Structure now is:
MR_No Char(13),
Mr_Date Date
My Previous data is MR_NO=APN00209085
I want to add two 00 after alter the table I want my result data like APN0000209085.I am updating through this command
update PR set Substr(MR_No,4,2)='00'
ERROR at line 1: ORA-00927: missing equal sign
Result I want is APN0000209085
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Sep 2, 2011
i need a query for update..the logic is
i have to update a single column(x.c) in x table.here the condition is x.a is not null and x.b is not null x.d is null then update x.c=x.b for each row.
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Jul 31, 2013
I have a scenario where I need to update field in report_input table.It has bind variables in it which will be prompted while running the query.I see that QUERY_VALUE field that need to be updated has length of VARCHAR2(3000).
desc report_input
Name Null Type
----------------- -------- --------------
QUERY_NAME NOT NULL VARCHAR2(64)
QUERY_VALUE NOT NULL VARCHAR2(3000)
[code]....
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Apr 1, 2012
I am trying to update a column based on another column in the same table (student table) and a column from another table (school table)
Code is:
update student_table
set student_code =
(select l.student_code
from school_table l, student_table n
where l.school = n.schoolname)
I get the following error ORA - 01427 Single-row subquery returns more than one row.
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Apr 10, 2013
I have a table like:
0035987850 P
0035987851 P
0035987852 P
I would like to update removing 00 in the first column. So after update to have:
35987850 P
35987851 P
35987852 P
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Nov 23, 2011
I want this trigger to automatically update the num_songs_in_album column in the album table whenever rows are inserted or deleted into the Track table.
SQL> CREATE OR REPLACE TRIGGER update_num_songs_in_album
2 BEFORE INSERT OR DELETE ON Track
3 FOR EACH ROW
4 BEGIN
5 IF INSERTING THEN
[code]....
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May 25, 2012
How to update two table column in single query ?
example :
update table1 t1 ,table2 t2
set t1.column = 'Yes',t2.column='Yes'
where t1.emp_code =t2.emp_code ;
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Feb 6, 2013
I use a sequence to generate an alphanumeric code and I need to update all rows of a table with that sequence. The sequence is created with this code:
SELECT (CHR(TRUNC(s.nextval/1000) + ASCII('A')) || LTRIM(TO_CHAR(MOD(s.currval,1000),'099'))
FROM dual;
I have tried many things - most recently
Update t3_temp_table
SET mergecode =
SELECT (CHR(TRUNC(s.nextval/1000) + ASCII('A')) || LTRIM(TO_CHAR(MOD(s.currval,1000),'099'))
FROM dual;
I get missing expression error.
It works fine if I use a straight s.nextval
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Apr 17, 2013
We had two tables.
Table 1: matusetrans
ITEMNUM Location Quantity transdate
AM1324 AM1 2 12-4-12
AM1324 AM1 2 15-5-12
AM1324 AM1 3 10-6-12
AM1324 AM1 4 5-1-13
[Code]....
Table 2: Inventory
ITEMNUM STORELOC lastyear currentyear
AM1324 AM1 need sum(quantity) here need sum(quantity)
AM1324 AM2 need sum(quantity) here need sum(quantity)
We have to update the last year and current year columns with sum of quantities for each item from matusetrans table based on date at different location in Inventory table.
we had nearly 13,000 records(itemnum's with different location) in inventory table in DB we have to update entire records.
How to write an sql queries to update lastyear and currentyear columns with sum of quantities based on itemnum and location in Inventory table
Edit/Delete Message
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Sep 30, 2010
How the length of column width effects index performance?
For example if i had IOT table emp_iot with columns:
(id number,
job varchar2(20),
time date,
plan number)
Table key consist of(id, job, time)
Column JOB has fixed list of distinct values ('ANALYST', 'NIGHT_WORKED', etc...).
What performance increase i could expect if in column "job" i would store not names but concrete numbers identifying job names.
For e.g. i would store "1" instead 'ANALYST' and "2" instead 'NIGHT_WORKED'.
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Apr 25, 2012
trying to update a column in a table which has 3 columns of 16million rows from column in another table which has 1million rows, there is no relationship between the 2 tables.
Table A has 3 columns of 16million rows, the first two columns have 16million ID numbers, the 3rd colunm is currently NULL.
Table B has 1million Numbers, i need to somehow update column 3 in table A using the numbers in table B, it doesnt how many times each of the 1 million numbers are used but i dont want it to just update every row to the same value.
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Dec 12, 2010
Even though the users are not logged in why the V$SESSOIN shows the SID and why many times?
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Jul 4, 2013
I am using 11.2.0.3.0 version of oracle.
Now we are supposed to apply column level TDE to some of our table in database. Now it will be a 'ALTER' on the columns. it involves 4 big tables out of which 3 tables having size ~30GB(one is partitioned table) and another one ~800GB(Not partitioned) Now the concern is, what will be the efficient/safest way to apply TDE on columns, below are the two options with us. (NOTE - We do have downtime window during DB maintenance but looking at the size of the table, i suspect it might take lot.)
1. Directly apply 'ALTER' on the columns. (Note- i was testing on my local, it took 3hrs for a 30GB table to ALTER the column to TDE)
2. Use Table Redefinition for Altering the column. (Creating interim table with column as TDE and then Redefining whole table).
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Apr 2, 2011
here is my query
SELECT CURRENTSTEP
FROM (SELECT ( WFENTRY.NAME
|| ','
|| CURRENTSTEP.STEP_ID
) AS CURRENTSTEP,
(CASE
WHEN WFENTRY.NAME IN
[Code]...
in this query I am concatenating tow columns , I use this query as a sub query in my other queries and filter the results with and CURRENTSTEP = ?
here is how I use it
select
sys_audit_id
from
( SELECT
*
FROM
(SELECT
F.FINDING_NUMBER,
[Code]....
I saw adding this as a subquery with the filter and CURRENTSTEP = ? is slowing my query very much , as this is a derived column i cannot add index then how to improve performance for this subquery ?
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Oct 10, 2013
We have a table called address and having the address fields and city ,state etc. The table will store huge amount of data .We need to query on the table. I would like to know how can we fasten the query and improve the performance of the query by creating index on these columns...Query is given below . note that the nullable columns can have data
SELECT *
FROM address
WHERE address1 = 'a'
[Code]....
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Dec 29, 2011
I have an issue in materialized view which has got one of the null able column and query on this column taking approximately 2 mins where as other indexed columns takes less than 10 sec.
Here is the summary
SQL> Select Count (1), Count (VAT_NO) From Mv_customer;
COUNT(1) COUNT(VAT_NO)
---------------------------------
2893561 1516
If an index is created on VAT_NO will that improve the performance. What kind of index can be created considering very less number of records has got VAT_NO
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Jul 23, 2013
I'm trying to collect histograms for column COL_C of table TAB_A(150K records), So an index "BAD_IDX" will *not* be used in a query when the value is not selective.
This is my query:
SELECT COL_A, COL_B , COL_C , COL_D , COL_E , COL_F
FROM TAB_A
WHERE COL_A = 050
AND COL_B = 13012345
AND COL_C = 0
AND COL_D = 0
AND COL_D >= '07/23/2013 00:00:00'
ORDER BY COL_E ASC;
Now, I have index "BAD_IDX" on columns (COL_C, COL_E ).and the distribution of values looks like this:
select COL_C, count(*)
FROM TAB_A --very not selective for 0, selective for the rest, also no histogram
group by rollup(COL_C)
order by 2 desc;
and the result is 20k row long (20k distincts), So I'll post just the top part of it:
COL_CCOUNT(*)
-------------
158382
086356
695583772
623044169
659558964
680045564
689664263
[code]...
Now, the problem with the query was that "COL_B = 13012345" was the most selective predicate, And an index for it did not exist, so the index "BAD_IDX" is used, and is scanning 86k records (all the "0" value records for column COL_C)!
So, I created an index
Create index GOOD_IDX on TAB_A(COL_B) compute statistics;
However, that BAD_IDX index is still being used! I've thought that maybe it's because the lack of histograms for the column COL_C.I've also understood from documentation I've read that the suitable histogram type is TOP FREQUENCY, Because although I have 20k distincts here for the column COL_C, what does the difference is the 86k records of value 0.
I try to create histograms for the column:
BEGIN
DBMS_STATS.GATHER_TABLE_STATS (
ownname => 'ANDREY'
, tabname => 'TAB_A'
, method_opt => 'FOR COLUMNS COL_C'
);
END;
/
But then when I check - I see that
1. My query is still using the wrong index
2. My histogram is height-balanced and not FREQUENCY
select histogram from dba_tab_columns where table_name='TAB_A' and column_name='COL_C' and owner=user;
The result is:
HISTOGRAM
----------
HEIGHT BALANCED
What do I need to do in order to
1. Make my query use the correct index
2. Create a FREQUENCY histogram
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