Downsampling (decimate) data csv huge

Similar Questions

• Reg: Spool data CSV-

  Hi Experts,
  
  I'm pulling in a CSV file using the < tt > < /tt > SPOOL data in table a prod.
  But the file is too large. The table has ~ 49K records and currently 35K have been inserted... the size of the file is 190MO now and still growing.
  
  When I open the CSV file, I checked after the last column of the next cell is not immediately after that. There is a long interval.
  It seems that the query could not generate the CSV file.
  
  I do something like below.

  set colsep ','
  set echo off newpage 0 space 0 pagesize 0 feed off head off trimspool on linesize 10000 
  spool c:\rb2\testing.csv
  
  SELECT 
      x.col1||','||
      x.col2||','||
      x.col3||','||
      x.col4||','||
      x.col5
  FROM 
      test_table x;
      
  spool off;

  No idea why the size becomes so huge and how can it be avoided?
  Thank you!
  
  -Nordine

  This is because you have set your LINESIZE as 10000.

  I would use DUMP_CSV. I installed in production. It is always useful.

  http://asktom.Oracle.com/pls/asktom/f?p=100:11:0:P11_QUESTION_ID:68212348056

• Fusion of data CSV file does not open

  Hello

  Problems of selection/update CSV files to merge data.

  This is a file that I worked for a while now with no probs in CS6.

  But it doesn't in CC.

  Get the following error "the data source selected has one or more empty field names.

  I tried zapping all data and data of collage in the new file, filling all the empty cells with data (although it worked fine before), also tried a TXT file. All this without success.

  A new CSV with little or no data in it works very well. But that is not very useful.

  Any thoughts?

  See you soon,.

  N *.

  The problem seems to be with the title of the column #

  I changed it to digitaland the new csv imported without problems or warnings.

  

• Load data CSV with Dates

  Hi all
  
  I have a CSV file and try to load it in an existing table and manage loading dates into the date columns. It has dates in the format like (2010-12-31 00:00:00) and Apex data loading will not accept them. It seems not to accept that something like: December 31, 2010 00:00:00.
  
  I can't reformat the CSV file as there are has 42 000 lines of data. Is it possible to make this work? I see a format column in the load screen data, but have found no info on what it is or how to use it.
  Any help would be greatly appreciated!
  
  TIA
  Mark

  Mark,
  Try to use a statement of formatting as DD/MONTH/YYYY hh24:mi:ss import...

  Thank you

  Tony Miller
  Webster, TX

• Could not retrieve data CSV.

  Jin
  I use OIM 9.1.0.1 and I tried to configure a user for the database using GTC and succeeded, I tried to create the GTC for the CSV to use as the source of confidence for reconciliation and succeeded but now when I try to Import CSV user to the database I'm no longer able to do and the regular taks indicates an error. I'm just stuck as I don't know what went wrong!
  
  Please help me...

  pre-fill adapter to generate a value for the mail attribute

  http://download.Oracle.com/docs/CD/E10391_01/doc.910/e10366/using.htm#sthref81

  Thank you
  Suren

• exp/imp without data creates huge empty db!

  Hello
  I have a db of 8.1.7.4 on windows 2000 400GO
  I wanted to exp / imp, but I don't want the data, just the structure and code
  
  So I did
  
  exp x/y@db LEADER = D:\exp_database.dmp LINES = COMPATIBLE N = Y FULL = Y CONSTRAINTS = Y GRANTS = INDEX Y = Y
  
  IMP x/y@db2 FILE = D:\exp_database.dmp ROWS = N FULL = Y CONSTRAINTS = Y GRANTS = INDEX Y = Y Feedback = 1000
  
  
  the 400GO exported to the file of 7 M, what's good
  but when I import the 7 M, it creates a VACUUM 160 GB database!
  I see that 'some' of the data files are full size, even it's empty!
  no reason for this, is the structure take 40% of the db?
  
  
  
  
  Thank you

  The 'COMPRESS' export setting determines how the CREATE TABLE statement must be created.

  By default, 'Y' 'COMPRESS' that is, a CREATE TABLE statement is generated with a LEADING period allocated size as large as the table (all extensions of the combined table) - without worrying about whether all lines exist in the table or all lines are exported or all lines are imported.

  You export with 'COMPRESS = N. Which generates instructions CREATE TABLE with INITIAL as large as the INITIAL of the exported table report. However, if the source table has an INITIAL definition of, say, 100 M, again, regardless of the number of rows present/imported/exported, the import will be CREATE TABLE with INITIAL of 100M. In these cases, you need to generate the CREATE TABLE statement and create the tables manually.

  Hemant K Collette
  http://hemantoracledba.blogspot.com

  Published by: Hemant K Collette on July 29, 2010 14:00

• How to export data from a string to a CSV file

  Hello

  I have a string in a script object Livecycle Designer with a couple of lines with different inputs divided by a semicolon:

  COLUMN1;COLUMN2;COLUMN3
  Entry1;Entry2;Entry3
  Entry4;Entry5;Entry6
  

  The goal now is to export this channel of Livecycle Designer in a CSV file, by clicking a button. Is there a suggested solution?

  Thank you very much.

  Hello

  You can try to create a dataObject object and then export, you can get some warning messages popup but try this;

  var csvData. = "COLUMN1; COLUMN2; COLUMN3\r\n ';

  csvData += 'Entry1; Entry2; Entry3\r\n ';

  csvData += "Entry4; Entry5; Entry6\r\n ';

  var PDF = event.target;

  pdf.createDataObject ("Data.csv", csvData);

  pdf.exportDataObject ({cName: "Data.csv"});

  If you replace the last line with

  pdf.exportDataObject ({cName: "Data.csv", nLaunch: 2});

  It will be opened in a .csv is approved (Excel on my system)

  Concerning

  Bruce

• Export the library of books as a .csv file?

  I'm trying to compare my Calibre library with my library of books in iTunes 11.4. Caliber exports data .csv file, but I don't see how the same (or even a file of Excel data or numbers) to the ca. 950 books in my library of books to iTunes. I managed to 'print' a PDF (28 pages) of it, however.

  Is it possible to get a data file of the compatible spreadsheet of my books on iTunes?

  I never did anything with iBooks, but with iTunes you can actually highlight a series of lines, copy, and paste.

• How to read strings from a file data?

  Hello

  I have a little. CSV files, which were inside the trees channels (load force, opening force, distance) captured from both engines.

  I want to load multiple CSV files and analyze only two strings (opening force and distance of travel) and send them to a report (go the distance on the x-axis and opening force to the y-axis), but in this report as all channels of all CSV files I have loaded. (make a multiple load)

  My question is how can I read csv files the channels I'm interested and then analyze?

  I use this example to HELP to load the data:

  Dim MyFileNames, iCount
  Call FileNameGet ("ANY", "FileRead", "D:\BOF-MIU\BOF Dim", "data CSV (*.)") "CSV), *.csv", "All.lst", True, "data selection".
  MyFileNames = Split (FileDlgFileName, "|")
  ICount = 0 to Ubound (MyFileNames)
  Call DataFileLoad (MyFileNames (iCount))
  Next

  "and then I try to analyze, but I don't know how to divide the csv file to get only the channels I want."

  Call ChnSmooth ("filedlgfile &" [1] / axis 1: Position (uu) "," / smoothed ', 12, "maxNumber" "...) Y, E, SmoothWidth, SmoothType

  Thank you for your time.

  HI Maria,

  Here is the approach to file dialog you asked--use it instead of the "FilePaths = GetNaviSelFiles()' in the command script I sent you:

  DlgTitle = "insert a file dialog title here...". »

  StartPath = ProgramDrv & "Libr\Dat\".

  FileExts = ' *.» DAT; *. TDM.

  Call FileNameGet ("All", "FileRead", StartPath, FileExts, "No", True, DlgTitle)

  FilePaths = Split ("|" & FileDlgFileName, "|")

  The trick in the TDR file I sent you was set up for mode "exanding" in the "Page layout settings" dialog box  It is an old display option that can cause problems if used in bad situations, but it seemed that it would make your life easier for this particular task.

  Brad Turpin
  Tiara Product Support Engineer

  National Instruments

• Try to write data to the file, but error 200279

  I have problems when writing data to a file. 10 seconds in the recording process, I get the error 200279. I did some research on the subject, but I am unable to corect my code. I think I want to increase the size of the buffer, but he prefers, I suppose, to read the data more frequently. The way that I save my file is, before starting the VI, I attribute a location and name of the file (e.g. data.csv). The date and time is added at the end of the actual when file the I start to record the data (e.g. data_07-26 - 13_122615.csv). If the file does not exist, it creates a new file, and then adds the data of this file after each iteration of the loop. The reason why I did this way was so I don't have to worry about running out of memory, but apparently my code is wrong.

  

  

  I will include a copy of the faulty section of my code. Any help would be greatly appreciated.

  Thank you.

  Your problem is that the writing on the disk is slow.  It is pretty slow so it causes your DAQ buffer overflow and cause error and loss of data.  What you need to do is to implement a producer/consumer.  This will put the data acquisition and recording on the disc in separate loops.  This will allow data acquisition work at speed, that he needs to deal with incoming samples and writing on disk can run at all what pace, he can.  You send data from data acquisition to the loop of logging using a queue.

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• data interpolation

  Hello.

  I'm trying to downsample Dynamics data acquired with the DAQ Assistant in LabVIEW. Specifically, data is acquired through a sampling frequency of 20000Hz, and I want to downsample the data acquired at 1000 Hz, before you write/save in a file. There was a discussion on this topic between samfrancis33 and mikeporter, in which the latter suggests passing the table of data in a loop and keep only every nth element of the array (n being equal to 20 in my case, for example). I have tried to implement the method suggested by mikeporter, but have not been able to do so. : would anyone be able to help me... ?

  Well, that stinks.  By only seen the basic version, looks like you've lost some features.

  See the VI attached for what I was talking with unbundling table Y and reconstruct back.

• read data channels / Diadem

  Hello

  I don't anymore. CSV files, which were inside the trees channels (load force, opening force, distance) captured from both engines.

  I want to load multiple CSV files and analyze only two strings (opening force and distance of travel) and send them to a report (go the distance on the x-axis and opening force to the y-axis), but in this report as all channels of all CSV files I have loaded. (make a multiple load)

  My question is how can I read csv files the channels I'm interested and then analyze?

  I use this example to HELP to load the data:

  Dim MyFileNames, iCount
  Call FileNameGet ("ANY", "FileRead", "D:\BOF-MIU\BOF Dim", "data CSV (*.)") ("CSV), *.csv", "All.lst", True, "data selection")
  MyFileNames = Split(FileDlgFileName,"|")
  ICount = 0 to Ubound (MyFileNames)
  Call DataFileLoad (MyFileNames (iCount))
  Next

  "and then I try to analyze, but I don't know how to divide the csv file to get only the channels I want."

  Call ChnSmooth ("filedlgfile &" [1] / axis 1: Position (uu) "," / smoothed ', 12, "maxNumber") '... Y, E, SmoothWidth, SmoothType

  Thank you for your time.

  Sorry to have chosen the wrong advice.

  I post again in the jury of DIAdem.

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  Choose the version of your database of old messages, it's 11.2.0.3...

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  11.2.0.4/Oracle Linux 6.4

  We want to reduce the size of the DB (file size of data), so that our RMAN backup size will be reduced. So, let's create stored procedures that will purge old data in huge tables.

  After you remove records, we will decrease the tables using the:

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  Hemant K Collette