Updates a slower non indexed column too?

Similar Questions

• An update on an index column with the same value generates an index to the top

  An update on an index column with the same value generates an update of the index?
  
  
  Thank you

  In addition to my previous answer, see also

  http://orainternals.WordPress.com/2010/11/04/does-an-update-statement-modify-the-row-if-the-update-modifies-the-column-to-same-value/

  Riyaj Shamsudeen has this to say:
  "+ We have an index on this column v1 and we update this column indexed too." Oracle was updating the indexed column? N ° if the values match the level of the indexed column, then the code of RDBMS isn't up-to-date index, a feature for optimization again. Only the row of table is updated, and the index is not updated. + "

  Hemant K Collette

• update of NULL in the column with the values of the adjacent column

  Examples of data

  with test_data as
  (select 1 as one, null as two, 2 as three,5 as four, 6 as five, null as six from dual
  union all
  select 1 as one, null as two, 2 as three,5 as four, 6 as five, null as six from dual)
  select * from test_data;
  

  This is one of those cases, the case may be where any value of a column can be null

  or two similar columns can be null. If the column is null then I want to update the adjacent column

  average value of the column, if the first column is null so I want to take the next non-null column and update, if the last column is null

  so I want to take prev not zero column and to update.

  In this case would be my expected output

  Un	Two	Three	Four	Five	Six
  1	1.5	2	5	6	6
  1	2	3	5	6	6

  Prospects for the future the suggesion or advice.

  Or, using Analytics:

  SQL> with test_data (id, one, two, three, four, five, six) as (
    2    select 1, 1   , null, 2   , 5, 6, null  from dual union all
    3    select 2, 1   , null, 3   , 5, 6, null  from dual union all
    4    select 3, 1   , null, null, 5, 6, null  from dual union all
    5    select 4, null, null, null, 5, 6, null  from dual
    6  )
    7  select *
    8  from (
    9    select id
   10         , cell
   11         , case when next_nn is not null and prev_nn is not null
   12             then (next_nn + prev_nn)/2
   13             else nvl(next_nn, prev_nn)
   14           end val
   15    from (
   16      select id
   17           , cell
   18           , val
   19           , last_value(val) ignore nulls over(partition by id order by cell) as prev_nn
   20           , first_value(val) ignore nulls over(partition by id order by cell range between current row and unbounded following) as next_nn
   21      from test_data
   22      unpivot include nulls (val for cell in (one as 1, two as 2, three as 3, four as 4, five as 5, six as 6) )
   23    )
   24  )
   25  pivot ( min(val) for cell in (1 as "ONE", 2 as "TWO", 3 as "THREE", 4 as "FOUR", 5 as "FIVE", 6 as "SIX") )
   26  ;
  
          ID        ONE        TWO      THREE       FOUR       FIVE        SIX
  ---------- ---------- ---------- ---------- ---------- ---------- ----------
           1          1        1,5          2          5          6          6
           2          1          2          3          5          6          6
           3          1          3          3          5          6          6
           4          5          5          5          5          6          6
  

• nonkey index columns

  Hi all
  
  I have a table with about 40 columns. Unfortunately, I analyse one of these columns with a query string % % type, which means that I'll always have to scan the entire table. Given that many columns are wide, it takes a lot of time. What I want to do is put an index on the column I do "love", while the number of blocks is much smaller, and the query is much faster. However, I don't want the burden of the generation of the index for it. Is it possible to just the decline in another index in oracle? I know that in other databases, it is possible to define columns as non-cles columns in an index. In other words, they are stored in the index structure, but they are not treated as part of the index (sort etc.). I know that I can create tables organized in index, but this isn't an option here. I need the table to be as it is now (in fact I don't have control over it), I just need to shoot only one outside column in a structure so that I can scan it much faster than having to load the blocks of the main table.
  
  Any thoughts?
  
  Thanks a lot for your help!
  Jake
  
  Published by: user11114252 on August 29, 2010 10:15

  >
  However, I don't want the burden of the generation of the index for it. Is it possible to just the decline in another index in oracle?
  >

  I didn't ' t think so. If you really want to improve access, you must add or modify the physical structure (create index or alter table).

  You can try to use a trick to force Oracle uses an index even with LIKE '% xxx %': see http://laurentschneider.com/wordpress/2009/07/how-to-tune-where-name-likebc.html

  You can also try this that some call "vertical partitioning" that is to split your table into 2 tables and try to hide the 2 tables behind a view:
  -t1 with the key and the string column
  -t2 with the key and all the other columns.

  Scan only t1 will be significantly faster.

  Another idea to throw a glance is the possbillity to use Oracle Text with a context index:
  http://download.Oracle.com/docs/CD/B19306_01/text.102/b14217/IND.htm

  See also the idea of creating you own 'index' with a simple table with a rowid in
  http://asktom.Oracle.com/pls/asktom/f?p=100:11:0:P11_QUESTION_ID:1546729400346500575

  Edited by: P. Forstmann on August 29, 2010 22:07

  Edited by: P. Forstmann on August 29, 2010 22:15

• Why the update did slow my MacBook pro down so

  Why the update did slow my MacBook pro down so much? What could be in the last update of El Capitan to slow my Mid 2010 GHz Intel Core 2 Duo Macbook Pro 2.66 down so much?   He has never run it slow before! Everything takes more time in all areas. Could I have made a mistake during the download and installation?  If so is it possible to force a re - install the latest update?

  I don't know if I can restore back after an update of this size. Everyone has similar problems or have thoughts on what could be wrong? I know it's far from being a State of the art Macbook Pro. But it was working fine before the update.

  Any thoughts would be really appreciated. I can't afford to buy anything newer right now.

  Thank you

  Ron Genovesi

  HMBGENO

  Things you can try to solve this problem:

  1 https://support.apple.com/kb/PH21875?viewlocale=en_US & local = en_US

  Start in safe mode and then restart.

  2. How to reset the NVRAM on your Mac - Apple Support

  Reset the NVRAM.

  If this does not help, download Etrecheck, a report and view the results here.

  http://etrecheck.com

• Updates very slow XP - SP3 crashes and the connection to the server fails

  original title: updates very slow XP

  I have two xp computers and updated running is very, very, slow down or failed to connect to the Microsoft website. The second computer, a laptop, is a special purpose computer, so I have no installed virus. SP3 is has crashed-out (3) time up here this morning. I tried to download sp3 for a manual install and the flow has dropped up to 2.2 k, then showed it failed to connect to the server. I know it is not my internet connection because the computer runs well so far here. I'm the only one.

  Thanks for your help.

  Hello

  Scan the computer for viruses:
  http://www.Microsoft.com/security/scanner/en-us/default.aspx

  Reset the Internet Explorer settings:

  http://support.Microsoft.com/kb/923737

  Disable the security software and then try to download the sp3:

  http://support.Microsoft.com/kb/950717

• I have win 7 and I can't update win 10 due to the too small system partition. I have only 2.98 gb

  I have win 7 and could ' t update win 10 due to the too small system partition

  The above is a statement. Do you have a question?

• ORA-01408: such list already indexed column.

  Hi all

  I get this error while improving my EBS 11.1.0.7 database at 11.2.0.4. I checked the newspaper and it shows:

  create indexes system.repcat$ _audit_column_f2_idx on

  2 system.repcat$ (base_sname, base_oname, base_conflict_type_id, _audit_column

  3 base_reference_name)

  4.

  System.repcat$ (base_sname, base_oname, base_conflict_type_id, _audit_column

  *

  ERROR on line 2:

  ORA-01408: such list already indexed column.

  Now what I want to know is if I have to cancel the session dbua, start the database, delete the index and dbua session start again?

  Kind regards

  Vinod

  The solution is already documented here:

  http://docs.Oracle.com/CD/E11882_01/server.112/e23633/upgrade.htm#UPGRD52647

  The solution is to drop the REPCAT$_AUDIT_COLUMN_IDX1 Directory and re-run the upgrade as described in "re-run the upgrade to Oracle Database".

• update the value of the column to the next value

  Hi all

  create table xxc_test (date of from_date, to_date date, amount, number incr_amount);

  Select 2014, 2015, 3000, the double null

  If suppose if input data in the incr_amount then let say 1000 I want to update the value with incr_amount column amount

  Select 2014, 2015, 4,000 of the double

  If not even though it is as

  Select 2014, 2015, 3000, the double null

  and must be updated to the year

  Note: I spend the year, amount,incr_amount manually (run-time)

  Post edited by: Rajesh123 Note added in the subect

  Hello

  : new.incr_amount: = 0; also use it in code.

  The condition " If : new.incr_amoun is > 0" then (sure fire or change the value only if the increment is positive. ).

  ,....

  ..
  

  end if;

  
  

  -Thank you

  Pavan Kumar N

• The last update has slowed my editing process in first Pro CC, Speedgrade & AfterEffects CC

  The last update has slowed my editing process in first Pro CC (Speedgrade must now restore the color? After the Animation effects, files have "without Audio or video?)  Can I re - download the latest version?

  I'm moving this to the Premiere Pro user forum so experts there can help you.

  You can also see:FAQ: how to install previous versions of creative cloud applications?

• Support SQL parameters and a non-existent column

  Using the concept of dataset in SSRS I run the SQL code below for different servers. (CH_PRD, LA_PRD, FL_PRD). When I say servers it's connections. If all these connections have the same tables, views, objects... etc with slight variations. These are the databases of our different entities.
  
  CH_PRD and FL_PRD a column 'NET_AMT' and 'TAXABLE_AMT', but LA_PRD has not. So, I get 'SF. TAXABLE_AMT' is an invalid identifier (makes sense because these columns do not exist in LA_PRD) when I run this for LA_PRD. SO is there a way to fix this please help me guys. Thanks in advance.
  

  SELECT 
   Account,
   CASE WHEN :Server= 'LA_PRD' THEN NULL ELSE SF.NET_AMT END AS NET_AMT,
   CASE WHEN :Server= 'LA_PRD' THEN NULL ELSE SF.TAXABLE_AMT END AS TAXABLE_AMT
  
    
  FROM CIRC_RPT.VW_SUBS_FINANCIAL_DRW SF

  Published by: varun on March 13, 2013 10:37

  >
  Using the concept of dataset in SSRS I run the SQL code below for different servers. (CH_PRD, LA_PRD, FL_PRD). When I say servers it's connections. If all these connections have the same tables, views, objects... etc with slight variations. These are the databases of our different entities.

  CH_PRD and FL_PRD a column 'NET_AMT' and 'TAXABLE_AMT', but LA_PRD has not. So, I get 'SF. TAXABLE_AMT' is an invalid identifier (makes sense because these columns do not exist in LA_PRD) when I run this for LA_PRD. SO is there a way to fix this please help me guys. Thanks in advance.
  >
  You need create this query string dynamically, and then submit the completed to process query string.

  You can not submit a query that includes a non-existent column to the database.

  String query;
  
  if (Server.equalsIgnoreCase('LA_PRD') {
    query = 'SELECT Account, NULL NET_AMT, NULL TAXABLE_AMT FROM CIRC_RPT.VW_SUBS_FINANCIAL_DRW SF';
  }
  else {
    query = 'SELECT Account, SF.NET_AMT, SF.TAXABLE_AMT END AS TAXABLE_AMT FROM CIRC_RPT.VW_SUBS_FINANCIAL_DRW SF';
  

• indexed columns became unusable. How do I solve it

  Hi all
  
  I truncated the data using alter command as follows.
  
  ALTER partition of truncate table table_one (partitionname);
  
  After I have tried to insert data into this table make me an error. And all index columns became unusable. I think do truncate the partition I'm facing this problem.
  
  can anyone suggest me how to do it... usable.
  I use tode
  
  
  Thank you
  Sree

  874823 wrote:
  Hi all

  I truncated the data using alter command as follows.

  ALTER partition of truncate table table_one (partitionname);

  After I have tried to insert data into this table make me an error. And all index columns became unusable. I think do truncate the partition I'm facing this problem.

  can anyone suggest me how to do it... usable.
  I use tode

  Thank you
  Sree

  http://www.lmgtfy.com/?q=Oracle+rebuild+index

• Is it possible to remove the NOT NULL to a non-key column constraint?

  Oracle version: Enterprise Edition 11g - 11.2.0.1.0
  OS: Redhat Linux Enterprise Edition 5.0
  
  
  
  Hi all
  
  
  I have a question on the NON NULL columns in oracle tables and I would be grateful if you could kindly help me with this problem well.
  
  I have the following table

  CREATE TABLE ARTICLES
  (
      artid                VARCHAR2(20),
      lbl                  VARCHAR2(100)        NOT NULL,
      cmporder             VARCHAR2(30)         NOT NULL      
  )
  
  ALTER TABLE ARTICLES ADD CONSTRAINT PK_ARTICLES PRIMARY KEY(artid);

  It's about a year that I have this table but recently the data model has changed and the third column of the table is that is mandatory, so NULL values for column 3 cmporder are allowed. I want to know is if it is possible to change the definition of the table (for example using an ALTER statement) in order to remove the "NOT NULL" in the third column constraint? This way I can keep the 2 million lines that are already in the table and avoid making a bakup before the deletion and re-creation of the table.
  
  
  Thanks in advance,
  
  Kind regards
  Dariyoosh

  Yes its possible...

  ALTER TABLE ITEMS CHANGE cmporder NULL;

  It will do for you

• How to set a non-Null column in CF9 ORM?

  How to set a non-Null column in CF9 ORM?  Thank you.

  Just to recycle my answer to your other question:

  You should find what you need in the docs here: http://help.adobe.com/en_US/ColdFusion/9.0/Developing/WSB7BEC0B4-8096-498d-8F9B- 77C88878AC6C.html

  Scroll up to where it describes the properties of the DOF.

  --

  Adam

• Gather_table_stats with a method to opt "for all indexed columns 0 size.

  I have 9 databases that I support that contain the same structure and concentrations of very similar data. We are seeing inconsistent performance in various databases due to bind variable peeking... I went down to the Min and Max values are collected during the analysis. I analyze from a cluster and these statistics of export/import in other groups... I will then on locking down the statistics collected. Some statistics are on tables that contain transient data (either purged old data and new data gets a new sequence number of PK).
  
  Since I am collecting statistics with a ' for ALL INDEXED COLUMNS SIZE 1', a min and max value entered. " This value is only appropriate for a short period of time and only for a specific database. I don't want oracle to know the density to help calculate, but I don't want cardinality from knowing if the current values for bind fall into this range of...
  
  Example of
  
  COLUMN PK
  
  When I analyze the min is 1 and max 5. I then let the database executed as well as the new min is 100 max 105... the same number of lines, but different min/max first select * table where pk > = 1 and pk < = 5 return cardinality of 5... Later, a select * table where pk > = 100 and pk < = 105 would return a cardinaility 1.
  
  Any ideas how to prevent this, other than to try the value min and max something myself (like min = 1 max = 99999999). ??

  MarkDPowell wrote:
  The SIZE of 1 means no histograms. Bind variable peeking must be done if you have histograms on the column, then you are sure that the problem is bind variable peeking?

  Mark,

  bind variable peeking has nothing to do with histograms, it is always performed so active and performs a hard analysis: http://jonathanlewis.wordpress.com/2006/12/11/bind-peeking/

  Of course, it is interconnected with histograms since these may introduce issues with equal comparisons, requiring different plans but are shared because of using bind variables (solved in 11 g adaptive cursor sharing with).

  Note that when the use of range comparisons even the pre - 10g release already checked the min/max values, it is only the equality comparison that checks the values min/max of 10g on.

  To the OP: collection of statistics using «For ALL INDEXED COLUMNS»... "is a bad idea in general, see for example: http://structureddata.org/2008/10/14/dbms_stats-method_opt-and-for-all-indexed-columns/

  If you use bind variable and range from comparisons then you will probably need to manipulate the statistics yourself / use advice if you cannot afford to collect statistics often enough to deal with changes.

  Kind regards
  Randolf

  Oracle related blog stuff:
  http://Oracle-Randolf.blogspot.com/

  SQLTools ++ for Oracle (Open source Oracle GUI for Windows):
  http://www.sqltools-plusplus.org:7676 /.
  http://sourceforge.NET/projects/SQLT-pp/