How effectively select rows randomly a large table?

Similar Questions

• How to select rows randomly by the percentage of lines by specific column

  I need to select exactly 20% of lines by Department randomly. Ex, table composed of 50 records for the Sales Department, 60 discs for the Department of human resources. I need to get 10 records of the Department sales and 12 records of Department of human resources. but records should be chosen at random. How to get out of it? Thanks in advance.

  Select

  DEPTNO

  count (*) NTC

  WCP

  Deptno group

  DEPTNO CNT

  30 6

  20 5

  3 of 10

  Choose 50% in every department at random

  expected (round up to the next integer)

  DEPTNO CNT

  30 3

  20 3

  2 of 10

  Select * from)

  Select

  EmpNo

  deptno

  , count (*) during the (partition deptno) cnt

  row_number() over (partition by deptno arrested by dbms_random.random) rn

  WCP

  )

  where rn<=>

  order by deptno

  EMPNO DEPTNO CNT RN

  7782 10 3 1

  7934 10 3 2

  7566 20 5 1

  7876 20 5 2

  7902 20 5 3

  7900 30 6 1

  7521 30 6 2

  7654 30 6 3

• How to select all text in a table with a single click cell?

  How to select all text in a table with a single click cell? I use TextField.selectAll () when you implement a table cell factory. But when I select a line with a single click, then a click on a table cell again: see the result image

  The text in the table cell is not all selected. What I simply selects all the text in a table cell when there is a click on it. How to realize that? Thank you

  Thanks for help ~.

• How to get the selected row in a programmatic table of the ADF (table generated from a bean)

  Hi all

  
  

  We use JDeveloper Studio Edition Version 12.1.3.0.0 and deployed on GlassFish Server Open Source Edition 3.1.2.2 (build 5) and connect to the SQLServer database.

  
  

  How to get the selected line in a programmatic (using a SortableModel custom not a display object) ADF table (generated from a bean)?

  
  

  We are trying to get the selected row in a bean of a programmatic ADF table to retrieve data based on the selected line.

  
  

  Any idea?
  

  Well, you can use selectionListener to set the selected line to a variable of bean (but this bean must be in extended view or some superiors)

  Something like this: http://www.awasthiashish.com/2015/07/get-selected-row-singlemultiple-from.html

  Dario

• How to select a random line with update?

  Hello
  
  I have a package to assign a number at random and reusable (ID) that is not currently in use - a procedure.
  I'm trying to simulate a set of numbers (IDs) using a table that has a column ID and IS_USED.
  
  How to:

  select a random ID (random row) 
  from pool_table
  where IS_USED is 0 (not taken)
  FOR UPDATE

  The update is to lock the line to be picked up by another process calling the package.
  
  GOLD:
  
  I can simulate a set of numbers with another object (not a table)?
  I need the numbers to be consistent between sessions (as well as package variables do not work) and only a single session using the same code at any time. When it finishes the number becomes available to the other races.
  
  Thank you.
  
  Published by: Pyrocks on November 7, 2010 10:45

  I completely forgot to SKIP LOCKED. You need not a sequence. Try:

  declare
      cursor pool_cur
        is
          select  *
            from  (
                   select  *
                     from  pool_tbl
                     order by round(dbms_random.value(1,cycle_value))
                  )
            for update
            skip locked;
      id_to_use number;
  begin
      while id_to_use is null loop
        for rec in pool_cur loop
          id_to_use := rec.id;
          exit;
        end loop;
      end loop;
  end;
  /
  

  SY.

• How to select a record in one table to manipulate data in a database?

  Hello community,

  Using 32-bit Labview 2015.

  I created a user interface that runs a query and retrieves my table from a sql database.

  I want to be able to manage only one record at a time by selecting the record in my table and then manipulate the data according to the needs.

  Whenever the user runs a query, I want as the first record in the table to be selected / highlighted.

  I want an indicator that is currently active.

  Then a click of a button, to be able to scroll the actively selected record.

  Once I have the selected record, I want a way to write a query to edit or delete the record.

  Is attached a photo of my query to select all of my table and connect data in my table (results).

  Attached a photo of my painting showing the timeline of my sql database.

  What is the best way to go on a record selection in a table and the modification of data with a query?

  Any help would be greatly appreciated.

  Thank you

  I guess that's not a table, but multi-column listbox.

  Right click, select--> highlight whole line selection Mode

  The value of the multicolumn listbox is the row index - you can write a local variable to highlight the line, the event structure to handle the user clicking on, etc.

  If you enable the property editable ListBox cells, you can allow users to edit the items of the listbox.

  If you want to get the data in row, you hint REF table and work with the array of strings in row - convert it to cluster, etc..

  I don't know, what type of data, it is, how you structure the database looks like, I don't even know if you use the wrapper to work with the database, I can't write queries for you.

  Something like Update Tablica Set Serial = '5' where ID = '22';

• How to select rows whose column contains specific characters?

  It is a telling of the T1 table with say column C1
  
  Either the C1 field values:
  
  1st row) OF/SPT/A/FWD
  line 2) G/SPT/DE/OF/SPT
  rank 3) R/FWD/SPT/A/FWD/FWD
  rank 4) A/A/OF/SPT/FWD
  rank 5) FWD/SPT/E/OF/A
  
  
  How to get only the lines whose C1 column contains FWD last?

  We can solve this problem with the simple use of a wildcard character:

      select *
      from t1
      where c1 like '%FWD'
      /
  

  Note that this query runs a full table scan, because any index you can have on C1 will be ignored: the indexes are organized on the main characters.

  Cheers, APC

• How to select rows as some passes?

  Hi all

  11.2.0.1

  I have two tables

  Emp1 (name1) contain values:

  =================

  Justin bieber peralta

  Bruno March minoza

  EMP2 (name2) contain values:

  =============

  Bieber

  March

  I want to choose emp1 name1 where name1 like ' % | name2. %' of emp2.

  I'm confused about the syntax

  Thank you

  pK

  Select e1.*

  from emp1 e1

  emp2 e2

  where e1.name1 like '% "| E2.name2 | '%'

  Ery Plan

  Operation	Options	Object	Rows	Time	Cost	Bytes	Filter Predicates *	access Predicates
  SELECT STATEMENT			31 015	1	796	527 255
  NESTED LOOPS			31 015	1	796	527 255
  ACCESS TABLE	STORAGE FULL	EMP2	8	1	4	40
  ACCESS TABLE	STORAGE FULL	EMP1	3 877	1	99	46 524	'E1 '. "' NAME1 ' LIKE '%" | ' ' E2 '. "' NAME2 ' | " %'	'E1 '. "' NAME1 ' LIKE '%" | ' ' E2 '. "' NAME2 ' | " %'

  Columns not indexed are marked in red

  Columns in index

  Not found index

  Columns in the table

  Table Owner	Table Name	Column Name	Data Type
  ETBIN	EMP1	NAME1	VARCHAR2
  	EMP2	NAME2	VARCHAR2

  Select *.

  from emp1

  where exists (select 1 from emp2 where emp1.name1 like '%' | name2 |) '%')

  Query plan

  Operation	Options	Object	Rows	Time	Cost	Bytes	Filter Predicates *	Access Predicates
  SELECT STATEMENT			32	13	9 850	384
  FILTER							THERE ARE (SELECT "EMP2" 0 'EMP2' WHERE: B1 LIKE '%' |) "' NAME2 ' | " %')
  ACCESS TABLE

  STORAGE FULL EMP1 77 537 1 101 930 444

  ACCESS TABLE

  STORAGE FULL RANKS FIRST EMP2 1 1 4 5 : B1 LIKE "%" | "' NAME2 ' | " %'

  Columns not indexed are marked in red

  bars

  Not found index

  Columns in the table

  Table Owner	Table Name	Column Name	Data Type
  ETBIN	EMP1	NAME1	VARCHAR2
  	EMP2	NAME2	VARCHAR2

  Select *.

  from emp1

  where to trim (substr (name1,

  InStr (name1,' ', 1, 1) + 1.

  InStr (name1,' ', 1, 1)-instr (name1,' ', 1, 1)

  )

  ) in select (separate name2

  from emp2

  )

  Query plan

  Query plan

  Operation	Options	Object	Rows	Time	Cost	Bytes	Filter Predicates *	Access Predicates
  SELECT STATEMENT

  77 537 1 109 1 318 129

  HASH JOIN

  77 537 1 109 1 318 129 'NAME2' = TRIM (SUBSTR ('NAME1', INSTR ("NAME1",' ', 1, 1) + 1, INSTR ('NAME1',' ',(-1), 1)-INSTR ("NAME1", "", 1.1)))

  VIEW

  VW_NSO_1 2 1 5 10

  HASH

  UNIQUE 2 1 5 10

  ACCESS TABLE

  STORAGE FULL EMP2 8 1 4 40

  ACCESS TABLE

  STORAGE FULL EMP1 77 537 1 101 930 444

  Columns not indexed are marked in red

  Ndex columns

  Not found index

  Columns in the table

  Table Owner	Table Name	Column Name	Data Type
  ETBIN	EMP1	NAME1	VARCHAR2
  	EMP2	NAME2	VARCHAR2

  According to very different plans, it must be a difference any.

  (ascheffer posted before cardinalities were known)

  Concerning

  Etbin

• How to select an image in a table for direct view DW 20141

  can someone explain to me how do I choose an image inside a table element, so I can apply css to it?

  I already tried application css class and ID in vain.

  I can select all other elements inside the table, except the picture.  Why would it be?

  Once a post is replied to, you can no longer change it.  But if you need to edit your post before anyone answered, you will find under Actions under your message.

  Nancy O.

• (CS3; JavaScript) how effectively "select all" / performing an action

  Hi all

  while I found little code to run applescript action I need to be able to do from JavaScript. The documentation does not mention at all of the shares.

  It would save me a lot of work if I could just perform an action that changes the color of the document to CMYK instead of having to duplicate all objects in a new document (I have already created the action and it works)

  This brings me to my other question: are there really no "select all"? It takes almost 2 seconds (at least if the Profiler is right) just to select a simple 300 objects in my test file. I need to batch process something like 30 records that could prove more complex and I don't like the idea to say to my colleagues that they should wait for so long...

  Is there a better way that a loop through pageItems and setting .selected = true?

  I could imagine performs an action that selects all objects (how to copy actions to others machines. btw?) or to run the shortcut (Ctrl + a).

  Thank you very much

  Mike

  Good evening

  Void test_ai()

  Set myAi = CreateObject ("illustrator.application.CS4")
  Set myDocAi = myAi.ActiveDocument

  ' - An idea is to show, as a first step, the layers on which you want to select all objects.

  myDocAi.Layers ("myLayerWithObjects"). Visible = True
  myDocAi.ActiveLayer.Locked = False

  myDocAi.Layers ("mySecondLayerWithObjects"). Visible = True
  myDocAi.ActiveLayer.Locked = False

  ' - In a second step, you select all

  For each myLayers in myDocAi.Layers
  If myLayers.Visible = True Then myLayers.HasSelectedArtwork = True
  Next

  ' - and finally, you define a variable with your selection

  myselexion = myAi.Selection

  End Sub

  After that, you will probably identify each item of your choice.

  Best regards

  Patrice

• How do I get the selected row in the table (FacesCtrlHierBinding).

  I am trying to get the data of the selected row in the table:
  
  RowBinding () (FacesCtrlHierBinding) tab.getSelectedRow = FacesCtrlHierBinding;
  Line rw = rowBinding.getRow ();
  
  But for oracle.adfinternal.view.faces.model.binding.FacesCtrlHierBinding be found since my 11 JDev to import.
  What is a good package for FacesCtrlHierBinding?

  Hello
  This is the code I use to get the selected rows in a rich table of adf:

      public void deleteMarkedRows()
      {
  
          RichTable table = this.getImportTable(); //get table bound to UI Table
          RowKeySet rowKeys = table.getSelectedRowKeys();
  
          Iterator selection = table.getSelectedRowKeys().iterator();
          while (selection.hasNext())
          {
              Object key = selection.next();
              table.setRowKey(key);
              Object o = table.getRowData();
              JUCtrlHierNodeBinding rowData = (JUCtrlHierNodeBinding) o;
              Row row = rowData.getRow();
              row.remove();
          }
  
          //prepare table to show changes
          table.setFirst(0);
          RequestContext.getCurrentInstance().addPartialTarget(table);
      }
  

  Hope this helps

  Timo

• How to select the lines/odd table...

  How to select lines / odd in a table?
  Help, please.
  
  Published by: vaibhav on May 7, 2012 05:30

  This can be done by using the function mod like this:

  For even rows
  Select * from (select rownum rn, nom_table.* from tableName) where mod (rn, 2) = 0;

  For the odd lines
  Select * from (select rownum rn, nom_table.* from tableName) where mod (rn, 2) = 1;

• How to create the column of the table for long-form Master detail relationship

  Apex 4.1

  Oracle 11g

  I created a form master detail and see the main table hotel_list and table hotel_mapping as detailed below.

  Hotel_list

  ID HOTEL_NAME

  1 Holiday Inn

  Hotel Hilton 2

  Hotel_mapping

  ID HOTEL_NAME MAPPING_NAME

  1 Inn Holiday Inn Select hotel

  2 holiday hotel Holiday Inn Select

  3 hotel Holiday Inn Holiday Inn Hotel

  4 Hilton Hotel Hilton Hotel chain

  Hotel Hilton 5 HiltonHotel

  Table Hotel_name Hotel_list is a linked table Hotel_mapping

  When I add a line to the Hotel_mapping table for the selected row in the hotel_list table, mapping_name of column is null, therefore impossible to create the relationship between the main table and the secondary table.

  I would like to know, how to create the relationship?

  Thank you very much

  Best regards

  Yong Huang,

  simple step see creating a form detailed master with APEX - Assistant Master retail

  and check how to maintain the relationship between two tables,

  simple return the packaged application «Sample of Masters details»

  and try to understand this concept...

  In your example, use Hotel_list.ID as a foreign key in the table Hotel_mapping

  and maintain the relationship with the column ID...

  and choose the display type of the column Hotel_list.ID in table Hotel_mapping as List(Query Based LOV) select.

  otherwise the best way is to create sample on oracle.apex.com

  I hope this helps...

  Leave.

• Insert rows checked in the table

  Hi all
  How to insert rows checked in another table. I've created an interactive report with the query as follows
  Select apex_item.checkbox(1,id,'unchecked') ", Column1, Column2 from table. Now when I check the boxes to check off and hit the Insert button it should get stored in another table in DB (table1).
  
  Process:
  DECLARE
  IDX number;
  BEGIN
  BECAUSE me in 1.APEX_APPLICATION. G_F01. COUNTY
  LOOP
  IDX: = apex_application. G_F01 (i);
  Insert into step3_table (ID, TASK_NAME, TASK_DESCRIPTION, CATEGORY, TASK_INFO, TASK_STATUS, TO_WORKGROUP, IMPACT, FILE)
  values (apex_application. G_F02 (idx), apex_application. G_F03 (idx), apex_application. G_F04 (idx), apex_application. G_F05 (idx), apex_application. G_F06 (idx), apex_application. G_F07 (idx), apex_application. G_F08 (idx), apex_application. G_F09 (idx), apex_application. G_F10 (idx));
  END LOOP;
  END;
  
  Thanks for the help!

  Hello

  You don't have a F02 - F04 berries in your query.
  Even you, your insert statement do not have enough source columns.
  Also I do not know you could get all the data tables in this way... table F01 value maybe not array index value.

  Try

  BEGIN
    FOR i in 1..APEX_APPLICATION.G_F01.COUNT
    LOOP
  
      INSERT INTO step3_table (ID,TASK_NAME,TASK_DESCRIPTION,CATEGORY,TASK_INFO,TASK_STATUS,TO_WORKGROUP,IMPACT,FOLDER)
      SELECT id,column2,column2,column3,column4,column5,column6,column7,column8
      FROM table
      WHERE id = apex_application.G_F01(i)
      ;
  
    END LOOP;
  END;
  

  Kind regards
  Jari

• ADF Table how to change the color Selected row in the array unfocuse.

  Hi all

  I have a requirment where I select the row of the table ADF and unfocuse on the table.

  According to the framework it gives me the light yellow color.

  How can I change this color with another color.

  Pls suggest.

  Thanks to Advans

  Barry Mucheli.

  Hello, Barry Mucheli.

  To change the color of the selected row when it loses focus, add the following code in your skin css file.

  AF | : the table-row data: selected: inactive af | : the column cell data

  {

  background-color: Green;

  }

  RFH.