Welcome Forums General PowerShell Q&A CSV searching, etc

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    • #172912
      Topics: 2
      Replies: 1
      Points: 24
      Rank: Member

      I have an interesting challenge.  I need to search for a string contained in column d of CSV 1 within any column of CSV2.  Once I find that value in CSV2, I need to take columns 1, 2 and 3 from CSV2 and insert that data into the same row we’re searching from in CSV1.


      CSV1 Columns: ID,FName,LName,Phone


      CSV2 Columns: ID, FName,Lname,Phone1,Phone2,Phone3,Phone4,etc…  (there are about 30 more)



      I need to search for the value of the phone number from file 1 in file 2, capture the values from that line in file 2 for ID, FName and LName.  The caveat to this is that file 2 contains over 1 million lines…

      Any help would be very much appreciated.

    • #172930
      Topics: 9
      Replies: 430
      Points: 729
      Helping Hand
      Rank: Major Contributor

      The easiest way to do this is to import the 2 CSV files as tables in a new SQL database, and runs SQL query to find the inner junction of csv1.d against csv2.* and dump the matches in a new third table for further processing.
      Same can be done without SQL but with large files you’ll have several hurtles to cross..

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