Question indexing and backup...

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• Question on the composite index and index skip scan

  Hello
  I have a confusion.
  I read the post of Burleson on the column of the composite index command (http://www.dba-oracle.com/t_composite_index_multi_column_ordering.htm) where he writes that
  
  «.. . for composite indexes the most restrictive value of the column (the column with the highest unique values) should be made first to cut down the result set in... »
  
  
  But 10g performance tuning book tells the subject INDEX SKIP SCAN:
  
  "... Index scan Skip allows a composite index that is logically divided into smaller subindex. In Dumpster
  scanning, the first column in the composite index is not specified in the query. In other words, it is ignored.
  The number of logic subindex is determined by the number of distinct values in the first column.
  
  Skip scanning is advantageous if there are few distinct values in the main column of the composite index and many distinct values in the key do not tip of the index... »
  
  If design us a composite index according to what said Burleson, then how can we take advantage of index skip scan. These two staements to oppose each other, Don't they?
  
  Can someone explain this?

  Even if you're not skip scanning, it is best to put the column with less distinct values in the main column of the index.

  If a query specifies two key as predicates of equality columns, it doesn't really matter how columns are sorted in the index.
  If a query specifies a range on a key column, it is most likely on the second column of the index.

  BTW, sometimes even a column 3 or the index of the column 4 is useful. In order to not restrict simply yourself in 2 columns. However, do not create too many clues - especially if there is overlap between the index.

  Hemant K Collette

• Songs to jump himself and backup battery less than before

  Hello Sir/Madam,

  I'm David. I have an ipod touch 6th generation, I've updated to firmware ios 10.0.2. I am confronted with these questions when I updated to ios 10 songs automatically you click previous track when I haven't touched and backup battery lasts 1 day before I used to get more than 2 days. He could use someone to help me get rid of these problems I face.

  Try:

  -Reset the device iOS. Nothing will be lost

  Device iOS Reset: Hold down the On / Off button and the Home button at the same time for to

  ten seconds, until the Apple logo appears.

  Unsync/delete all the music and Resync

  To remove all music go to settings > general > use > storage > storage management > music > tap Edit in the top-right, then press the sign less than all music

  -Reset all settings

  Go to settings > general > Reset and tap reset all settings.

  All your preferences and settings are reset. Information (such as your contacts and calendars) and media (such as songs and videos) are not affected.

  -Restore from backup. See:

  Restore your device from an iCloud or iTunes backup - Apple Support

  https://support.Apple.com/en-us/HT204184

  -Restore factory settings/new iOS device.

  If still problem, make an appointment at an Apple store Genius Bar because it appears that you have a hardware problem or there is a bug in iOS.

  Shop Apple Store - Genius Bar

  https://www.Apple.com/retail/Geniusbar/

• After downloading the 23.0.1 version I've lost all the history, but no bookmarks. How can I recover ancient history? Recovery of "import and backup" does not help

  My story memorable and kept going back quite a few months. After the release of Firefox for 23.0.1 I lost all my history and Firefox keeps only the websites visited once the new version has been installed. My favorites were selected. I tried to get back in "Import and backup", but it goes back only to the date of the new facility. I tried places.sqlite "Roaming", but there is only one with the current date. Is there a way to recover the lost history? Why Firefox was losing it? It's going to happen averytime that updates Firefox?

  Manually back up your bookmarks. If you have used the 'import', you have already lost some information by overwriting. As a matter of course you should always save current bookmarks manually before using any restorations.

  • Restore backup bookmarks or move them to another computer

  This way you can make sure you are able to restore the current set. Your backup .json file put a safe off-trail program or Firefox profile. The desktop of Windows or the removable media would be appropriate.

  Firefox creates a bookmark, but does nothing about backup history. Fortunately Windows probably backup previous versions of your files places.sqlite and this is the database with the history and bookmarks in it. See if you can recover a recent version of this, it will restore your story up to the date of the restored file.

  • http://Windows.Microsoft.com/en-us/Windows7/previous-versions-of-files-frequently-asked-questions
  • the places.sulite file is in the Firefox profile, a hidden folder that is easy to find by searching for defects. See profiles of boards - where Firefox stores your bookmarks, passwords and other user data_how-do-i-find-my-profile

  Then import your latest bookmarks from anywhere where they were rescued. Import replaces the slightly older bookmarks from the Windows file.

  You my wish also can install and run the addon places maintenance.

  • https://addons.Mozilla.org/en-us/Firefox/addon/places-maintenance/

  That can be used to check and repair the places.sqlite database. It will give a brief report. Note If the places.sqlite runs out of space, he begins removing history.

  In the future you my wish to regularly create occasional backups of your profile or at least your places.sqlite

  • Backup and restore Firefox profiles information

• There is no "Import and backup" button in "show all bookmarks".

  I try to import bookmarks from an HTML file, using the isntructions to https://support.mozilla.com/en-US/kb/Importing%20Bookmarks%20from%20an%20HTML%20File?as=aaq#os=linux & browser = fx7

  I click on bookmarks-> show all bookmarks.

  The next step, said "from the toolbar in the library window, click on import and backup, and then Import Bookmarks in HTML... "

  However, I don't see anything that says "import and backup". I use Firefox 7.0.1 on Ubuntu/service Ocelot, recently updated.

  Ubuntu 11. XX shows the window menus in the control bar at the top of the screen with the switch to the window of the Unit Manager.

  • http://en.Wikipedia.org/wiki/Ubuntu_Unity

  Click bookmarks/view all bookmarks, and then move your mouse to the upper left corner to the Firefox Web browser.

  You will get a pop up menu (Organization, views and import and backup).

  • [822193/questions/822193]

• No import and backup in Firefox 7.0.1 for Ubuntu canonical - 1.0

  After spending and update Ubuntu Ubuntu 11 and with the new Firefox 7.0.1 for Ubuntu canonical 1.0, I was going to import the backup of bookmarks to html to see that there is no way to import and backup of bookmarks. What is the problem here?
  I'd give Tech info there.

  How can I restore saved bookmarks when there is no way to do it?

  Ubuntu 11.04 displays the window menus in the control bar at the top of the screen with the switch to the window of the Unit Manager.

  • http://en.Wikipedia.org/wiki/Ubuntu_Unity

  Click bookmarks/view all bookmarks, and then move your mouse to the upper left corner to the Firefox Web browser.

  You will get a pop up menu (Organization, views and import and backup).

  • [822193/questions/822193]

• Disabled Options of Outlook 2007 indexing and advanced search options

  Im running Windows 7 RC1 Ultimate x 64 and I recently started having a problem with Outlook 2007. Somehow all advanced search options (hit the double arrow to the right of the Inbox "search" field to specify, body, subject, etc.) are disabled - that is grayed out and I can't use them. If I go to the search options in Outlook all under the category indexing and search is also disabled. Finally, I noticed that if I go into Windows Indexing Options > change, under the heading change of the chosen places 'Microsoft Office Outlook' is grayed out as and when I go over it the ToolTip says "indexing of Outlook emails like summer disabled by the system administrator.

  I confirmed this isn't something set via Group Policy, because I have several other similar PC which presents all works very well on. The only thing I can think is vaguely remembered changing some indexing options a bit back to allegedly to increase performance, but I don't remember what that or if I did before or after loading Win7.

  Any suggestions are greatly appreciated!

  In case someone else falls on this same question, I found the answer on the newsgroups Outlook here .

  Just need to change some registry settings to get this working again.
  HKLM/Software/policies / Microsoft/Windows/Windows search
  PreventIndexingOutlook value 1

  HKLM/Software/Microsoft/Windows Search
  SetupCompletedSuccessfully to 0

  Reboot and everything is fine!

• Sync, Iomega EZ media and backup Center Center.

  Hello

  I hope someone could advise me if Sync Center (Windows 7 64-bit), will work with an Iomega multimedia, EZ (1 TB) and backup center.

  Iomega multimedia, EZ (1 TB) and the backup center, appears on "My computer/network locations", with all the different readers (for example. Documents (\\IomegaEz) (t) and the music, movies, photos, backups and media shared, but does not appear in "Sync Center".

  I would really appreciate any help and advice to achieve this, I had the "Iomega, Quick-Protect" how works, but he lost, due to the change to Windows 7.

  I'm afraid that my computer skills are very poor, so please be gentle with the speeches of tech :)).

  Yours Sincerely,

  Patrick Fitzgerald_434

  Hello

  Thanks for posting the query on the Microsoft Community Forums. You have reached the right place. Let us work together to find the cause of this problem and try to solve.

  Backup and Iomega EZ Media Center is compatible with Windows 7. I suggest you to see this link on how to install and use Iomega EZ media and a backup center.

  Lenovo EZ & Backup media
  https://Lenovo-na-en.custhelp.com/app/cust_alp/p/1189, 1194

  See also the link: http://shop.Lenovo.com/us/en/servers/network-storage/lenovoemc/ezmedia/index.HTML#tab-features  

  Let us know the update after trying the steps above.

• ASA5505 configure VPN primary and backup

  Dear experts,

  I would like to ask you a few question that now I didn't get any primary VPN and backup connection, how can we do on this is sue? (I mean that when the primary reduction, then backup connection is automatically)

  Could you advice me how can I do?

  Best regards

  Rechard_hk

  I guess we should have asked for a bit more information, it seems Marwan and I responded almost at the same time, and I'm sure he'll provide great info.

  I had more geared towards a scenario of a firewall failure fault tolerance or an ISP connection failed in an architecture Fw DOUBLE and DOUBLE tis.

  Assuming that you want to have redundant firewall design, is when you look into the firewall active / standby to provide firewall redundancy, but when it comes to connections continues with VPN when one firewall fails, this is with characteristic State in place.

  IM providing links for reference belloe to get an idea of fws active and reserve but ASA5505 is the only model who is a stateless person, it is not dynamic which means connections will have to re - perform when one firewall fails.

  Also to implement two firewalls for the implementation of the changeover you need security more license to enable the active feature and reserve. This license will also include the activation of support DMZ and power create a VLAN to 20, as well as support Double TIS.

  Example of active / standby

  http://www.Cisco.com/en/us/products/HW/vpndevc/ps2030/products_configuration_example09186a00807dac5f.shtml

  Comparison of the ASA - Look into Ipsec more license and features.

  http://www.Cisco.com/en/us/products/ps6120/prod_models_comparison.html

  On the other hand you may have in the future a backup ISP link, not only do you have active failover / standby but you can also have a backup ISP must link primary link fails with ALS and follow-up of Staic routing.

  http://www.Cisco.com/en/us/products/HW/vpndevc/ps2030/products_configuration_example09186a00806e880b.shtml

  Rgds

  Jorge

• Drag and drop question - Desktop and USB

  Hello!!

  I have an Asus laptop that I bought in September with Windows 8 is installed. I saw drag and drop questions on desktop lately, and I'll provide you with a full run down of what past:

  1. this particular case, I wanted to save my mobile by copying and pasting all the files from my phone to a USB (USB Kingston).

  2. I selected all files, right click to copy, open the folder that I made in the USB for my phone content and do a right-click Paste.

  3. nothing's happened, Explorer seems to have frozen, so I opened the Task Manager and press end task, all closed and restarted my laptop.

  4. I have excluded that my phone was the issue. I was able to create a folder on my desktop and copy and paste all of the content of my phone in the folder on my desktop.

  5. I tried to copy and paste / drag and drop an image from my office to the flash drive. Explorer Windows freezes on the rise again.

  6. I tried another flash drive. Explorer Windows froze again.

  Apparently I'm unable to copy files ON a USB key, which makes the backup and backup of things a headache because Windows Explorer stops working every time.

  I am the only user of this laptop, and I don't know what is happening or what to do. Any help would be appreciated. Windows 8.1 upgrade would solve this problem?

  Hi Karthik,

  1. There is no error message.

  2. I tried earlier drag - move my documents to my flash drive and it works perfectly.

  I just tried again to drag and drop from my office to my flash drive and for some reason, it works again.

  I don't think that was with my flash drives, but with Windows Explorer itself. Nevertheless, it seems to have fixed itself somehow. Thank you very much for your help!

• Are there patches IE11 and Chrome for RoboHelp for Word 10? Table of contents, Index, and search do not work as expected in WebHelp...

  Question:

  Fixes IE11 and Chrome on the Adobe web site ask you to put their new files in RoboHTML templates_stock folder. However, I need these fixes for RoboHelp for Word. Is there a such difficulty?

  Background:

  
  

  I use 10 RoboHelp for Word, generating WebHelp.

  I try to solve the problems about the table of contents, Index, and search appears not not or not being not completely functional IE11 or Chrome, not including many of our customers use. I found a couple of workarounds that my boss doesn't like.

  • In IE11, if the end user adds the web site to the compatibility view list, they all appear and function correctly, but my boss is adamant about not wanting the end user having to do anything to solve the problem.
  • In Chrome, I can get a table of contents and a non-functional search to appear if the user turns off JavaScript for the site, but this solution also violates the lists see also in help. Again, made my boss wants to not that the end user to have to do.

  His solution is just to generate using pure HTML, but then the search won't work in IE11 or Chrome (I'm not sure about Firefox). I are based largely on the research, when I'm working on the product, so I really don't want to lose the search function.

  Help, please.

  Kind regards

  Jenn

  As I said in my reply to your message in the RoboHelp for Word forum, there is no patch for this.

  I can understand your not wanting to Manager end users will do anything and agree with him. However, the fixes for these issues in HTML HR are simply not available in RoboHelp for Word.

  See www.grainge.org for creating tips and RoboHelp

  

  @petergrainge

• spatial index and normal index

  Hi space specialists,.

  I have a question for spatial index performance and how Oracle manages queries that have a space and regular condition combined. We are on the Oracle 10 g Enterprise Edition Release 10.2.0.4.0 database

  Take a query like this one (not a real query but based on the type of query that is generated by ArcGIS):

  Select objectid

  attribute

  geometry

  table

  where mdsys.sdo_filter (geometry, mdsys.sdo_geometry (: gtype1,: srid1, null,: elem_info1,: ordinates1), 'querytype = window') = 'TRUE '.

  and attribute = value

  In our scenario, we have a lot of rows in the table (2 million), but we have only a few lines (2000) where attribute = value.

  It seems that there is a scenario where the performance is really bad. It takes 5 seconds for the query to return the results and you're just too slow for our needs. There is a spatial index on a geometry and a normal index on the field for the attribute. The plan of the explain command shows that both the spatial index and the index of the attribute are used.

  Of course, we can break to the top of the table in separate tables by object type. This would make the index space datamodel much more efficient, but at the expense of our current simple, abstract.

  Do you have suggestions on how we can improve performance without too much impact on our datamodel? Oracle for example has an option where you can create a spatial index on a subset of the data in a table?

  Thank you!

  Rob

  Do not know whether or not the following works for your case:

  use the column range-key attribute to create a partitioned table Beach and then create a local spatial index.

• What happens to the existing after the partition of table index and created with local index

  Hi guys,.

  / / DESC part id name number, varchar2 (100), number of wage

  In an existing table PART I add 1 column DATASEQ MORE. I wonder the part of table based on dataseq.now, the table is created with this logic of partition

  create the part table partition (identification number, name varchar2 (100), number of salary, number DATASEQ) in list (dataseq) (values partition PART_INITIAL (1));

  Suggestionn necessary. given that the table is partitioned based on DATASEQ I wonder to add local indexes on dataseq. to dataseq, I have added a local index create index idx on share (dataseq) LOCAL; Now my question is, already, there are the existing index is the column ID and salary.

  (1) IDX for dataseq is created locally so that it will be partition on each partition on the main table. Please tell me what is happening to the index on the column ID and salary... it will create again in local?

  Please suggest

  S

  Hello

  first of all, in reality 'a partition table' means create a new table a migration of existing data it (although, theoretically, you can use dbms_redefinition to partition an existing table - however, it's just doing the same thing behind the scenes). This means that you also get to decide what to do with the index - index will be local, who will be global (you can also reassess some of existing indexes and decide that they are not really necessary).

  Second of all, the choice of the partitioning key seems weird. Partitioning is a data management technique more that anything else, in order to be eligible, you must find a good partitioning key. A column recently added, named "data_seq" is not a good candidate. Can you give us more details about this column and why it was chosen as a partitioning key?

  I suspect that the person who proposed this partitioning scheme made a huge mistake. A non-partitioned table is much better in all aspects (including the ease of management and performance) that divided one wrongly.

  Best regards

  Nikolai

• ORA - 29857:Domain index and objects secondary exists in Tablespace

  Database: 10.2.0.4
  OS: Windows
  
  While dropping the tablespace, I'm getting ORA-29857.
  I understand that I must remove indexes of area on the tablespace, and also to find secondary objects in this tablespace and drop them.
  
  
  Please provide me with step by step troubleshooting (query) for this error.
  
  
  
  Thank you
  Alok

  damorgan, one of our As Oracle answered this question even a couple of years. He is Director of Oracle ACE and Oracle self-taught over 12 years at the University level - http://www.morganslibrary.org/)

  ORA-29857: domain indexes and/or secondary objects exist in the tablespace

  As he hinted after the accurate results of the applications after using the name of your tablespace

  SELECT * FROM v$version;
  
  SELECT COUNT(*)
  FROM dba_segments
  WHERE tablespace_name = 'yourTableSpaceNameHere';
  
  DROP TABLESPACE yourTableSpaceNameHere INCLUDING CONTENTS AND DATAFILES;
  

  This query will show you the objects

  SELECT owner, segment_name, partition_name, segment_type, segment_subtype, relative_fno
  FROM dba_segments
  WHERE tablespace_name = ''yourTableSpaceNameHere'';
  

  Those are the objects that you will lose if you drop the tablespace.

• Function Index and Query Rewrite

  Hi members,
  
  
  I just stumbled on something that I've never thought of before.
  
  It has to do with the function according to index and (possibly re - write query)
  
  Here is my configuration:

  SQL> create table tab1 (
    2    x   varchar2 (1)   default 'N' not null check (x in ('Y', 'N')),
    3    y   varchar2 (100) not null
    4  );
  
  Table created.
  
  SQL> create index tab1ix on tab1 (NULLIF(x,'N'));
  
  Index created.
  
  SQL> insert into tab1 (y)
    2    (select rpad (level,100,'x') from dual connect by level <= 1000);
  
  1000 rows created.
  
  SQL> insert into tab1 (x,y) values ('Y', 'Hello there');
  
  1 row created.
  
  SQL> commit
    2  /
  
  Commit complete.
  
  SQL> exec dbms_stats.gather_table_stats(user, 'tab1', cascade => true)
  
  PL/SQL procedure successfully completed.

  So, I created a small table with a FBI.
  
  Now, let's use it.
  The first is a query that obviously do not use it.
  Second, one is a query that corresponds to the FBI.
  

  SQL> explain plan
    2     set statement_id = 'st1'
    3     into plan_table
    4  for
    5  select * from tab1 where x = 'Y';
  
  Explained.
  
  SQL> 
  SQL> select plan_table_output
    2    from table(dbms_xplan.display('PLAN_TABLE', 'st1','TYPICAL'));
  
  PLAN_TABLE_OUTPUT
  --------------------------------------------------------------------------------
  
  ----------------------------------------------------------
  | Id  | Operation         | Name | Rows  | Bytes | Cost  |
  ----------------------------------------------------------
  |   0 | SELECT STATEMENT  |      |   501 | 51603 |     5 |
  |   1 |  TABLE ACCESS FULL| TAB1 |   501 | 51603 |     5 |
  ----------------------------------------------------------
  
  
  SQL> explain plan
    2     set statement_id = 'st2'
    3     into plan_table
    4  for
    5  select * from tab1 where NULLIF(x,'N') = 'Y';
  
  Explained.
  
  SQL> 
  SQL> select plan_table_output
    2    from table(dbms_xplan.display('PLAN_TABLE', 'st2','TYPICAL'));
  
  PLAN_TABLE_OUTPUT
  --------------------------------------------------------------------------------
  
  ----------------------------------------------------------------------
  | Id  | Operation                   | Name   | Rows  | Bytes | Cost  |
  ----------------------------------------------------------------------
  |   0 | SELECT STATEMENT            |        |     1 |   103 |     1 |
  |   1 |  TABLE ACCESS BY INDEX ROWID| TAB1   |     1 |   103 |     1 |
  |   2 |   INDEX RANGE SCAN          | TAB1IX |     1 |       |     1 |
  ----------------------------------------------------------------------
  
  SQL> 

  No worries, right?
  Everything works as expected, when my predicate corresponds to the FBI, the index is used.
  
  
  But here's what surprises me. It seems that the index expression is rewritten then it is created:
  

  SQL> select column_expression from user_ind_expressions
    2  where index_name = 'TAB1IX';
  
  COLUMN_EXPRESSION
  --------------------------------------------------------------------------------
  CASE "X" WHEN 'N' THEN NULL ELSE "X" END
  
  SQL>

  Questions are now, is this safe? -Does still work?
  
  Can I trust the optimizer always did a rewrite such as performed when the index was created?
  
  
  This index might live throughout the years and many versions of the optimizer. But the expression stays (I guess)
  
  This is going into production this weekend, so I wanted to hear,
  ideas / comments?
  
  
  Best regards
  Peter
  

  SQL> select *from v$version;
  
  BANNER
  ----------------------------------------------------------------
  Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bi
  PL/SQL Release 10.2.0.3.0 - Production
  CORE    10.2.0.3.0      Production
  TNS for Linux: Version 10.2.0.3.0 - Production
  NLSRTL Version 10.2.0.3.0 - Production

  PS: NULLIF is nothing else than a syntactic sugar for the CASE expression equivalent?
  docs say:

  The NULLIF function is logically equivalent to the following CASE expression:
  
  CASE WHEN expr1 = END expr1 expr2 THEN NULL ELSE

  edited by: Peter on February 9, 2012 05:32

  Hi Peter

  In the docs for NULLIF, he said

  The NULLIF function is logically equivalent to the following CASE expression:

  CASE WHEN expr1 = expr THEN ELSE NULL expr1 END 2

  http://docs.Oracle.com/CD/B10501_01/server.920/a96540/functions85a.htm
  http://docs.Oracle.com/CD/B19306_01/server.102/b14200/functions102.htm
  http://docs.Oracle.com/CD/E11882_01/server.112/e26088/functions116.htm

  Which would explain the behavior you saw. As you pointed out, it is possible that the transformation of NULLIF expression BOX equivalent is likely to change? It seems unlikely - indeed, it seems to be an alias or a macro for the instruction box unless there is some way technically superior to implement this logic, it seems to be here to stay. Certainly, it has remained unchanged since the 9i.

  Not sure how that helps.

  David