I have table of 60 gb(indexes 60gb ) and it is subject to fragmentation around 10gb .
I m going to remove fragmentation . As i know i have three options
1.expdp/impdp .
2.CTAS (create table ........as.......) with parallel option .
3.Moving table into another tablespace with parallel option .
I have 4 physical and 4 logical cores(total 8 cores) on server .
I have tried below steps for removing the table fregmentation but for some table i am not getting good result here.
1. It will collect the data which are having more than 100MB fragmentation.
select owner,table_name,blocks,num_rows,avg_row_len,round(((blocks*8/1024)),2)||'MB' "TOTAL_SIZE", round((num_rows*avg_row_len
/1024/1024),2)||'Mb' "ACTUAL_SIZE", round(((blocks*8/1024)-(num_rows*avg_row_len/1024/1024)),2) ||'MB' "FRAGMENTED_SPACE" from
dba_tables where owner in('a','b','c','d') and round(((blocks*8/1024)-(num_rows*avg_row_len/1024/1024)),2)
> 100 order by 8 desc;
2. then move the object(table) to the same tablespace.
alter table abc move;
alter table bcd move;
alter table efg move;
3. also rebuild the dependent objects.
alter index abc_PK rebuild online;
4. Then analyze the table which are having more than 100MB of fragmentation.
exec dbms_stats.gather_table_stats('a','abc');
exec dbms_stats.gather_table_stats('b','bcd');
exec dbms_stats.gather_table_stats('c','cdf');
after that when check the table fragmentation, i am getting the same result, which i have collected from the 1st query.
find out whether the rowmovement option in a partitioned table will cause fragmentation or not?
View 3 Replies View RelatedA query to find the table fragmentation.
View 1 Replies View RelatedI got the error ORA-01653: unable to extend table <OWNER.TABLE_NAME> by <BYTE> in tablespace <TABLESPACE> in my production database. But I could see 4GB of free space available in the tablespace. But this was resolved after increasing the Tablespace size by 1 more GB. So I wanted to know how I can I reclaim the 4GB space ?
While searching in internet I got few tips like there will be a fragmentation in the tablespace, the free space available in the tablespace may not be a continuous block. To avoid this we need to reorganize the tables using ALTER TABLE <TABLE_NAME> MOVE <TABLESPACE>; command.
But in my tablespace there are huge number of tables exists I cannot do reorganization of all the tables. So I need to know how to identify particularly what are the tables has more fragmentation? so that I can go for reorganizing those tables only.
My Database version in 9.2.0.7
Tablespaces are Locally Managed
To remove fragmentation which is the best method.
First one :
-----------------
1)Created a backup table from the Fragmented table (This table is a partitioned one).
2)Analyzed this table.
3)DROP the Fragmented table
4)Inserted the backuped up data from backup table to the Re-created table.
5)Analyze this table.
Second method
-------------------
1) Create a backup table newly, with PCTFREE =0
2) Inserted the data from Fragmented table ( This is a partitioned table) to backup table
3) Analyzed this table.
4) Truncate Fragmented table
4) Did Exchange partition of Fragmented table with Backup table.
The second method is not found to be removing the Fragmentation. Before the fragmentation was 28% after Second method the fragmentation is still the same. While the first method the fragmentation reduced to 16%.
Query used to find Fragmentation.
select table_name,
round((blocks*8),2) "table size kb",
round((num_rows*avg_row_len/1024),2) "actual data in table kb",
round((blocks*8),2)- round((num_rows*avg_row_len/1024),2) "wasted space kb",
[code]...
Does "Update on a Partitioned Column" cause fragmentation ?
See example below :
Suppose I have a table as below that has approx 3 million rows and growing :
1) Table ABC :
file_id number
status_flag varchar2(1)
file_Content clob
date_created date
2) This table is list partitioned on Column "status_flag".
Column "status_flag" can take 3 values "A" or "B" or "C"
3) A file_id can transition from 1 "Status_flag" to another. [ A--> B , C--> B, B-->C, A --> C, etc ]
This means its possible to UPDATE the "status_flag " - the partitioned column.
Question :
-------------
1) Would the movement of rows from 1 partition to another cause fragmentation ?
2) Or Instead, should this be achieved by maintaining 3 tables - 1 each for every "status_Flag" as Table_A, Table_B, Table_C
This would mean that, if file_id 1, changes "status_flag" from 'A' to 'B' :
-- The corresponding row from Table_A will be created in Table_B
--- The same will be deleted from Table_A
This would still cause fragmentation ... with the overhead of Inserting a CLOB column from 1 table to another.
3) How to determine how much percent of the table is fragmented ?
i have deleted 20 lak rows from a table which has 30 lak rows,
and i wanted to release the fragmented space, what is the procedure other than exp/imp or alter table move
and also the recommended way to do this prod env... (coalesce /alter move etc.. )
db version is 11.2
Oracle DB version : 10.2.0.5.0
OS version HP-UX B.11.31 U ia64
DB size : 2TB
We have the above configuration for one of our oracle database. One of our DBA acts like he is only the person on this earth who is managing the process of fragmentation removal from the tablespaces in order to improve the performance and wastage of the space. He performs that task at weekends and takes one-off day extra. I am not sure how the fragmentation removal improves the performance and deallocates the space.
Is it compulsory to perform the rebuild process weekly in order to remove fragmented space from tablespaces? Do we have any other method to automatically re-organize objects occupying waste space?
Why the reuild of indexes using separate tablespace improves performance? is there any specifi reason for it?
I want to do horizontal fragmentation of a table say employee. But fragmentation is often related to distributed databases. So i want to ask how can i do this on my single home computer? list out the steps that should be performed. I saw the concept of link but really failed to understand that.
View 14 Replies View RelatedIs this the right query to determine index fragmentation ?
SELECT AVG (tfrag)
FROM (SELECT /*+ ORDERED USE_NL(i) INDEX(i DR$TEXT_IDX$X) */
i.token_text,
(1
[code]...
The reason I am asking that before index rebuild it returned 86% but after rebuild (ALTER INDEX .. REBUILD) it returned
96% which does not make sense.
I did try ctx_report.index_stats but it takes more time to run.
I have a question about database fragmentation.I know that fragmentation can reduce performance in query times. The blocks are distributed in many extents and scans process takes a long time. Oracle engine have to locate the address of the next extent..
I want to know if there is any system view in which you can check if your table or index has high fragmentation. If it's needed I will have to re-create, move or rebulid the table or index, but before I want to know if the degree of fragmentation is high.
Any useful script or query to do this, any interesting oracle system view?
I receive source data with leading zeros. The Rules says: "If there is a leading 0 it has to be removed and data has to be shown starting with character 2".Here is my code I started with:
CREATE TABLE leading_0_test
(
col_1 VARCHAR2(10)
)
insert into leading_0_test values('00123')
select trim(leading'0' from COL_1),trim(leading'0' from substr(COL_1,1,1)),COL_1 from leading_0_test
The first trim removes all leading zeros. Therefore I tried to solve it with the substr, but without success.
query string in such like that index.php?name=tejaspatel
i have table in record is available below
select * from emp where name = :name // it is query string parameter
emp
name
tejas patel
then how to match this record ?
I have a file name field in my database that stores each file name with the extension .TXT and almost each file name is different.I would like to remove this extension from all of the file names without using the different file name each time I update. Is there any SQL statement that will allow me to do this? I am using Oracle.
View 1 Replies View Relatedhow to Completely remove Oracle 11g from my computer ?
View 2 Replies View RelatedIn V$BACKUP_PIECE there are many backup pieces OBSOLETED and EXPIRED with fields: handle set to null and deleted to as "YES"
I ran the CROSSCHECK BACKUP and DELETE OBSOLETE and DELETE EXPIRED BACKUP, and they works.
But how can I remove these lines? Are they still important for anything?
I install oracle 10 g but I don't remember password . so I then remove oracle 10 g by select Universal Installer and click Deinstall and then reinstall but I can't reinstall because I don't remove/delete oracle_home I then delete folder in path C:Oracle and reinstall Question
1.in this remove oracle 10 g method true or wrong if wrong , How effect on my computer
2.why after reinstall my computer is very slow.
remove duplicates from my collection(table type).Or an alternate solution for my issue is get clean data into my collection which i am not able to get to either.
Object creation
create table testingtype_table(ordernumber number,org_id number , company_name varchar2(10))
insert into testingtype_table values (1124,2424,'cbaaa');
insert into testingtype_table values (1124,2424,'cbaaa');
create or replace type testingtype_obj as object (ordernumber number,org_id number , company_name varchar2(10));
create or replace type testingtype_tab as table of testingtype_obj;
Code Block
declare
l_testingtype_tab testingtype_tab := testingtype_tab();
begin
select distinct testingtype_obj(ordernumber
,org_id
,company_name)
bulk collect into l_testingtype_tab
from testingtype_table;
end;
If only i can get a way to bulk collect only distinct values into the table type that will just do great but when i try the above (with distinct highlighted in red) it throws an error
ORA-22950: cannot ORDER objects without MAP or ORDER method
Removing duplicates from a string that contains years and "-".
Example: 1988-1997-2000-2013-1998-1965-1997-1899
I know this can be done in regular expressions but have no experience in this subject.
select REGEXP_REPLACE(.....) from dual;
i have two tables
Quote:
Table has following data.
id indicator
---------------
1 A
2 A
3 A
Quote:
Table2 has
id indicator
---------------
1 X
1 X
2 X
3 X
I would like to have following output ( Am running query on Toad)
t1_id t1_indicator t2_id t2_indicator
---------------------------------------------
1 A 1 X
1 X
2 A 2 X
3 A 3 X
I need to removed special characters (!, ", #, $, %, &, /, () from a string, i have a table with sll this special characters and words that i have to remove from the string.
How can i do that ?
i have a string with |R!$#&2-_D%2 and i want to get R2-D2
SELECT '|R!$#&2-_D%2' as Original, 'R2-D2' as Correct
FROM DUAL
how can i get distinct records through this coding, when i add select distinct col1, col2, col3 from tablename where RECD_ON between :control. REC_ FROM and :control.REC_TO; in 1st qry after begin, this form not retrive any data from database, then how i get distinct rows through this coding. is there any option in property plattee to get distinct rows.
declare
qry varchar2(5000);
n number;
alert number;
Begin
[code]....
I do have a query which gives me two rows of data.(This might be more than two in other cases)
The data I get is formed as :
COUNTRY_DESCRIPTION COUNTRY_CODE EVENT_NUMBER EVENT_DATE APPLICANT
European Patent EP 101 Kiksu
European Patent EP 101 Mokilosu
What I want to get should be formed as :
COUNTRY_DESCRIPTION COUNTRY_CODE EVENT_NUMBER EVENT_DATE APPLICANT
European Patent EP 101 Kiksu
Mokilosu
As you can see, I removed the first four columns because the eventkey is the same. In this case, there is only the applicant which is different.So the rest should be blank.
The code I do use to get this data:
SELECT
TABLECOUNTRY.COUNTRYDESCRIPTION "COUNTRY_DESCRIPTION"
,TABLECOUNTRY.COUNTRYCODE "COUNTRY_CODE"
,OWNER.NAME "APPLICANT"
,CASEEVENT.EVENTNUMBER "EVENT_NUMBER"
,TO_CHAR(CASEEVENT.EVENTDATE,'DD.MM.YYYY') "EVENT_DATE"
[code]....
So what to modify in the query to get these columns of the second row blank?
How to write a pl/sql query to trim/remove more than one character from string.
Like the itemfield is 'Profit CY' I want it to show as 'Profit' but only for itemfields that say 'Profit CY' in the column for remaining items in column such as 'Loss CY' should stay as it is.
My query is suppose to capture the student's number, date of birth, and number of students which that students mentors. I am suppose to show only the 5 oldest students
SELECT s.std_num, s.birth_date, COUNT(s2.mentor_num)
From Student s left outer join Student s2
on s2.mentor_num=s.std_num
GROUP BY s.std_num, s.birth_date
ORDER BY s.birth_date ASC;
This function works but the problem is in displaying the five records because whenever I apply the rownum<=5 function the counter returns incorrect results. I tried writing another query to fix it but I could not dispay the counter anymore
SELECT ROWNUM as SENIOR, s.std_num, s.birth_date, COUNT(s2.mentor_num)
FROM (SELECT s1.std_num, s1.birth_date, COUNT
(e2.super_id)
From Student s left outer join Student s2
on s2.mentor_num=s1.std_num
GROUP BY s1.std_num, s1.birth_date
ORDER BY s1.birth_date ASC) S
WHERE row_num<=5;
This code only works if I remove the count in the first line but I need to display the number in my result.
Basically I need to use REGEXP_REPLACE in order to remove from a string certain oracle code pricislly those which are used on RAISE_APPLICATION_ERROR from 20000 to 20999. We have an application here that handles those exceptions and each exception append each other so inside them we can find those ORA-20001: Some error. ]
So I was wondering if I can achieve that by using REGEXP_REPLACE. So which regexp I could use so that I can remove those oracode only!
In Oracle XE when I run PL/SQL in the SQL Commands window I will sometimes get a "Not found" error. It further reads, "The requested URL /apex/wwv_ flow.show was not found on this server". I found that if I remove all of the indentations from the lines of the PL/SQL code everything will work fine. Talk about a screwy problem. So, if you have that problem just take all of your PL/SQL code and slam it up against the left margin.
View 1 Replies View RelatedI want to remove duplicates from a column MAIN_TABLE based on TLEVEL Column:
create table UNIQ_TEMP
( TLEVEL NUMBER(10,0),
TABLE_NAME VARCHAR2(30),
MAIN_TABLE VARCHAR2(30)
);
[code]....
My Requirement is:
MAIN_TABLE= MARKETING_OPTIN
EXISTS IN MAX(TLEVEL)
REMOVE DUPLICATE MARKETING_OPTIN FROM OTHER LEVELS
This should apply to all the values in column MAIN_TABLE
I am using an Oracle view and package to extract data from my DB to build an XML file on the fly.
My problem is that on very rare occasions, an invalid XML character will be in the database. This, of course, causes my XML file to error.
My question is: What are the possible ways to remove invalid XML characters when selecting out of a DB field? Any function that has been written for this type of thing, or is a VERY long 'translate' more of what I should be doing?