Rownum and order of columns not indexed

Similar Questions

• generation of sequence using rownum and order of

  Hi all

  Need to generate a sequence number based on a column value in a table.

  When you try to insert into a table by using the order by and rownum, I am not able to do the same thing.

  Here is a simple example to show this... need help how to insert a sequence field in the base table a column value...

  create table test1(col1 number);
  
  
  insert into test1 values(1);
  insert into test1 values(2);
  
  
  
  
  insert into test1 values(4);
  insert into test1 values(3);
  

  select * from test1;
  

  1

  2

  4

  3

  Now, I'm trying to insert into test1 values-based test2:

  create table test2(col1 number,seq number);
  
  
  insert into test2 (select col1,rownum from test1  order by col1 asc);
  

  ORA-00907: lack of right parenthesis

  So I tried with:

  insert into test2 select col1,rownum from test1  order by col1 asc;
  

  It worked, but the sequence is not generated according to the ranking...

  COL1

  SEQ

  1	1
  2	2
  3	4
  4	3

  can someone please help...

  Thanks in advance...

  MRK...

  Another way would be to use analytical functions. These have the advantange of being independent of the order of... in fact, you could use serveral where everyone has his own sort.

  Select col1

  row_number() over (order by col1 CSA) seq_asc

  row_number() over (order by col1 desc) seq_desc

  of test1

• Subselect with Rownum and Order By

  Good morning, people, I'm trying to do some Firebird SQL work in Oracle and there is something that I can't find an easy way to deal with:

  CUSTOMER has many RECIPES, let's say I want the ID of the last receipt of a customer...

  That's how it's done in FB:

  SELECT

  c.ID, c.name,
  

  (SELECT FIRST r.id 1

  RECEPTION r

  WHERE r.customer_id = c.id

  ORDER BY r.creation_date DESC) as LAST_RECEIPT_ID

  CUSTOMER c

  It's simple and works like a charm... the subselect statement will order first of all, the most recent reception will be the first line, then I use to avoid any error 'select several lines in singleton' a 'first 1 ", equivalent to rownum = 1;

  If I try this with Oracle it won't work:

  SELECT

  c.ID, c.name,
  

  (SELECT r.id

  RECEPTION r

  WHERE r.customer_id = c.id

  AND rownum = 1
  

  ORDER BY r.creation_date DESC) as LAST_RECEIPT_ID

  CUSTOMER c

  
  

  What is the best way to achieve the same in Oracle?
  

  SELECT c.id
  ,      c.name
  ,      (SELECT MAX(r.id) KEEP (DENSE_RANK FIRST ORDER BY r.creation_date DESC) last_receipt_id
          FROM   receipt r
          WHERE  r.customer_id = c.id) as last_receipt_id
  FROM customer c;
  

• Windows Live Mail will not sort in alphabetical order 'To' column

  In Windows Live Mail I can click on the header of column and sequence or sort by alphabetical order of most of the columns, but for some reason, it will not sort in alphabetical order the column 'To '.  Some names are grouped, but a lot of seemingly random order occurs.  How can I fix?

  Hi Scott,.

  Unfortunately, this is a known issue that has yet to be resolved.  See http://www.windowslivehelp.com/thread.aspx?threadid=7cd886b5-6726-4ef8-833d-6d19819be8ec where it is attached the answer someone of Windows Live (not only a poster regular like most of us) almost exactly the same question as you - and the answer is quite recent.

  Here's another thread in the same pregnant responded with an MVP who admits that it is a bug that has yet to be resolved.  http://www.windowslivehelp.com/thread.aspx?ThreadId=c601b584-4448-4564-9702-64065e86b1d5 although this dates back to January, apparently he still is not resolved and requires the latest version of the product as well (so that they really have trouble with this code).

  Sorry it wasn't the answer you wanted to hear, but it's something that you just need to treat before iti is resolved.  I would put a bookmark on the page of main support of these links (click back until you get there) and periodically check to see if a solution has been found (or perhaps a work around).  In fact, any questions about Windows Live Mail, you would do well to post in this forum instead of here because they are much more experienced with it, aware of the problems and solutions and quite simply have more people with greater expertise on this product if you are likely to get a better response and more quickly (or even find the solution by searching on the solution and then site forums).

  Good luck!

• LONG and LONG RAW columns cannot be indexed

  Hello
  
  Why columns LONG and LONG RAW can not be indexed?
  
  Thank you
  K. Henry

  (1) LONG, LONG RAW since depricated 8i so you shouldn't use them never to anything.
  (2) LONG, LONG RAW have same decent support to be manipulated to PL/SQL, so there is essentially no SQL support.
  (3) it is very rare that you would have something to index in a LONG or a LONG RAW from a point of view of the features. You're not likely, for example, want to store more than 4 KB of data in a LONG and then do things like searching for strings that start with a particular phrase. You are very very likely to want to find a LONG RAW binary to search for lines where the binary data starts with a specific string of bytes. Eventually, you want to be able to use Oracle Text on a LONG field to search for certain words and phrases in the text, but I do not know which existed prior to the feature being depricated.

  Justin

• movie maker error message: not indexed and cannot be imported

  I put my video clips imported from my digital camera of MOV to WMV with Format Factory and now get the error message in Movie Maker...

  The C:\...wmv file is not indexed and cannot be imported.

  Try using the free utility WMVIndexer . It is towards the bottom of the page in the given the download link.

  The utility should be easy to follow. It will add indexes to the .wmv clip to allow quick advance and rewind indexing so that WMM can then use in the edition.

• What is this mean:MVI_3165 ~ 1.wmv is not indexed and cannot be imported?

  What is this mean:MVI_3165 ~ 1.wmv is not indexed and cannot be imported?

  The. WMV file may be corrupted somehow...
  and probably is unseekable. IOW... If you play
  the file in Windows Media Player, you can not
  Drag the search bar to advance the video.

  If you want to experiment with the repair of the
  . WMV file... the following freeware may be
  worth a try:

   
  (FWIW... it's always a good idea to create a system)
  Restore point before installing software or updates)

  AsfBinWin version 1.8 [version 1.8.2.903]
  http://www.radioactivepages.com/AsfBin.aspx
  (Windows XP - Vista - 7)
  (Intuitive, fast and reliable tool for processing
  ASF and WMV files)

  Good luck...

• Windows movie maker error - the file is not indexed and cannot be imported

  I have converted a quicktime in WMW clip, but when I try and import the video in windows movie maker, that it comes up with error the file is not indexed and cannot be imported? What does that mean?

  Try another converter.

  There are to many converters available on the net...
  the following links are some examples.

  Proceed at your own risk *.

  (FWIW... it's always a good idea to create a system)
  Restore point before installing software or updates)

  (1) format Factory (freeware)
  http://www.videohelp.com/tools/Format_Factory
  (the 'direct link' is faster)
  (the file you want to download is: > FFSetup270.zip<>
  (FWIW... installation..., you can uncheck
  ('all' boxes on the last screen)
  (Windows XP / Vista / 7)

  First, you will need to decompress the file or just open the
  Drag FFSetup270.exe out of the folder
  and drop it on your desktop. To install left click.

  (2) Freemake Free Video Converter (freeware)
  http://www.Freemake.com/free_video_converter/
  (Windows XP / Vista / 7)

  (3) Koyotesoft Free Video Converter
  http://www.koyotesoft.com/indexEn.html
  (2000/XP/2003/Vista/Seven)

  (4) Sothink Free Video Converter
  http://www.Sothinkmedia.com/video-converter/
  (Windows XP / Vista / 7)

  (5) SUPER © Simplified Universal Player Encoder & Renderer
  http://www.videohelp.com/tools/Super
  (the download mirror site is faster) (Windows XP / Vista / 7)

  (6) Xilisoft Video Converter
  http://www.Xilisoft.com/video-converter.html
  (not freeware but receives good reviews)
  (Windows XP (SP2 or later) / Vista / 7)

• Recently ordered (and order confirmed) "Plan of creative photography of Cloud (one year). I want to cancel it, but during the procedure, I do not even the option "Cancel". How should I proceed?

  Recently ordered (and order confirmed) "Plan of creative photography of Cloud (one year). I want to cancel it, but during the procedure, I do not even the option "Cancel". How should I proceed?

  In order to cancel the order, please contact customer service

  You can use: http://helpx.adobe.com/x-productkb/global/phone-support-orders.html

  For more information on cancellation: cancel your creative cloud membership

• I had paid yesterday, but have not received a serial number. and the system had not found my order. [was: Dear Sir:]

  I had paid yesterday, but have not received a serial number. and the system had not found my order.

  Please help, thanks.

  My E - mail; [email protected]

  Details of payment have not been downloaded, the order could not get through. You must place another order with full valid credit card.

  Concerning

  Baudier

• I downloaded version 5.7 of Lightroom in order to support the captive capture on my Nikon D750 and its still does not. More when I was invited to give my serial number for the update that was not the case that are on my Adobe profile, although I purchas

  I downloaded version 5.7 of Lightroom in order to support the captive capture on my Nikon D750 and its still does not. More when I was not invited to give my serial number for update is no where on my Adobe profile, although I bought and pays every month for my creative cloud for photography. Help, please

  Your subscription to cloud shows correctly on your account page?

  If you have more than one email, you will be sure that you use the right Adobe ID?

  https://www.adobe.com/account.html for subscriptions on your page from Adobe

  If Yes

  Some general information for a subscription of cloud

  Cloud programs don't use serial... numbers you, connect you to your cloud account paying to download & install & activate... you may need to sign out of the cloud and restart your computer and log into the cloud for things to work

  Sign out of your account of cloud... Restart your computer... Connect to your paid account of cloud

  -Connect using http://helpx.adobe.com/x-productkb/policy-pricing/account-password-sign-faq.html

  -http://helpx.adobe.com/creative-cloud/kb/sign-in-out-creative-cloud-desktop-app.html

  -http://helpx.adobe.com/x-productkb/policy-pricing/activation-network-issues.html

  -http://helpx.adobe.com/creative-suite/kb/trial--1-launch.html

  -ID help https://helpx.adobe.com/contact.html?step=ZNA_id-signing_stillNeedHelp

  -http://helpx.adobe.com/creative-cloud/kb/license-this-software.html

  If no

  This is an open forum, Adobe support... you need Adobe personnel to help

  Adobe contact information - http://helpx.adobe.com/contact.html

  -Select your product and what you need help with

  -Click on the blue box "still need help? Contact us. "

• maximum value for a column in a table without using rownum and rowid, group

  Hi all
  
  Is it possible to recover the maximum value in a column of a table without help:
  1 rownum and rowid.
  2. the Group
  3. any built-in function of Oracle.
  
  Kindly let me know if possible.
  
  
  Kind regards.
  
  Published by: J2EE_Life on January 23, 2012 21:06

  select e1.empno
    from scott.emp e1
    left outer join scott.emp e2 on e1.empno < e2.empno
   where e2.empno is null
  

• JTable with custom column model and model table does not display the table header

  Hello
  
  I create a JTable with a custom table model and a custom column template. However the table header is not displayed (Yes, it's in a get). I have narrowed the problem down in one compilable example:
  
  Thanks for your help.
  

  import javax.swing.*;
  import javax.swing.table.*;
  
  public class Test1 extends JFrame
  {
       public static void main(String args[])
       {
            JTable table;
            TableColumnModel colModel=createTestColumnModel();
            TestTableModel tableModel=new TestTableModel();
            Test1 frame=new Test1();
  
            table=new JTable(tableModel, colModel);
            frame.getContentPane().add(new JScrollPane(table));
  
            frame.setSize(200,200);
            frame.setVisible(true);
       }
  
       private static DefaultTableColumnModel createTestColumnModel()
       {
            DefaultTableColumnModel columnModel=new DefaultTableColumnModel();
            columnModel.addColumn(new TableColumn(0));
  
            return columnModel;
       }
  
       static class TestTableModel extends AbstractTableModel
       {
            public int getColumnCount()
            {
                 return 1;
            }
  
            public Class<?> getColumnClass(int columnIndex)
            {
                 return String.class;
            }
  
            public String getColumnName(int column)
            {
                 return "col";
            }
  
            public int getRowCount()
            {
                 return 1;
            }
  
            public Object getValueAt(int row, int col)
            {
                 return "test";
            }
  
            public void setValueAt(Object aValue, int rowIndex, int columnIndex)
            {
            }
       }
  }

  Published by: 802416 on October 14, 2010 04:29
  added

  See http://download.oracle.com/javase/6/docs/api/javax/swing/table/TableColumn.html#setHeaderValue (java.lang.Object)
  When the TableColumn is created, the default headerValue is null
  So the header ends up rendered empty label (probably of size 0 if the JTable calculates its size of header based on the size of the default rendering tool).

  It worked:

       private static DefaultTableColumnModel createTestColumnModel()
       {
            DefaultTableColumnModel columnModel=new DefaultTableColumnModel();
                  TableColumn col = new TableColumn(0);
                  col.setHeaderValue("Header Title");
            columnModel.addColumn(col);
                  return columnModel;
       }
  

  Published by: jduprez on October 14, 2010 14:09
  Beaten by a fraction of a second!

  Published by: jduprez on October 14, 2010 14:10
  OK, by a split of 17 minutes, specifically: o)

• Rownum and Rowid

  Can someone me detailed on ROWNUM and ROWID explain it please?
  
  Please explain with some examples?

  ROWNUM is a pseudo-column that gets assigned an integer from 1 by the SQL engine in the order in which the lines are read from the database. The order in which the lines are read and the order in which the lines are output can be different (for example Order By) the rownum column is not necessarily ordered in the output. And you can't use ROWNUM in the Order By clause.
  ROWNUM begins with 1, has no gaps or missing numbers and is unique in the result set returned by a query.

  The ROWID is an unique identifier assigned by the database engine when a row is inserted into a table. It is unique in the entire database. It is derived from the disk/block/sector numbers where the line is physically stored. It is persistent and stored in the line. Where to store a line is decided by the SQL engine based on indexes, clusters, etc. the rowid does not present any correlation to what anyone, other than the physical address of the line. It is used in the index, by the base engine, to go according to the data of the Index to the physical address to expedite access. As developers, we use ROWID to uniquely identify a line, even in the absence of a PK.

  Kind regards

• SQL does not index

  SELECT DISTINCT eval.match_student_name (a.booking_id,
                                           2059980
                                          ) "Student Name",
                  NVL (b.student_email, b.email_address) email_address,
                  a.booking_id "Student Registration Number",
                  b.customer_name "Company Name",
                  DECODE (b.pmt_confirmed,
                          'E', 'Exception',
                          'Y', 'Yes',
                          'N', 'No'
                         ) "Confirmed Commitment ",
                  '1' "Edit", a.title "Class Id",
                  b.exception_comments "Exception Comments",
                  NVL (b.opn_member, 'N') "OPN_Member",
                  NVL (b.opn_partner_name, '-') "OPN Company Name",
                  a.booking_id "View Attendance",
                  DECODE (eval.check_bookingid_push_gsi (a.booking_id),
                          1, apex_item.checkbox (1, a.booking_id, 'Checked'),
                          apex_item.checkbox (1, a.booking_id, 'Disabled')
                         ) "Select",
                  DECODE
                     (eval.check_bookingid_push_gsi (a.booking_id),
                      1, 'Ready TO push TO GSI',
                      2, 'In Progress',
                      3, 'Complete',
                      'MANUAL'
                     ) "Booking ID Status"
             FROM ( select * from eval.eattend_student_attendance where title = 2059980 ) a,
                  ( select * from eval.eattend_student_info where verified_by IS NOT NULL ) b
            WHERE 
              --AND b.verified_by IS NOT NULL
          a.title = b.title
         AND a.booking_id = b.booking_id
         ORDER BY a.booking_id

  Execution plan
  ----------------------------------------------------------
  Hash value of plan: 3921177175
  
  ----------------------------------------------------------------------------------------------------
  | ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |
  ----------------------------------------------------------------------------------------------------
  | 0 | SELECT STATEMENT | 11. 1870 | 353 (3) | 00:00:05 |
  | 1. SORT ORDER BY | 11. 1870 | 353 (3) | 00:00:05 |
  | 2. UNIQUE HASH | 11. 1870 | 352 (3) | 00:00:05 |
  | 3. NESTED LOOPS |
  | 4. NESTED LOOPS | 11. 1870 | 351 (2) | 00:00:05 |
  |* 5 | TABLE ACCESS FULL | EATTEND_STUDENT_ATTENDANCE | 11. 176. 318 (3) |
  |* 6 | INDEX RANGE SCAN | PERF_EATTEND_STUDENT_INFO_N98 | 1 | | 2 (0) | 0
  |* 7 | TABLE ACCESS BY INDEX ROWID | EATTEND_STUDENT_INFO | 1. 154. 3 (0) | 0
  ----------------------------------------------------------------------------------------------------
  
  
  
  
  pls see full access table EATTEND_STUDENT_ATTENDANCE, I have an index in the table for a column that is used in sql. Why index used not?
  
  
  
  Thank you
  
  
  REDA

  Because the optimizer's view that the lot is faster.

  Can see us some statistics, index, and cardinality columns?