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Full Discussion: CSV with commas in field values, remove duplicates, cut columns
Top Forums Shell Programming and Scripting CSV with commas in field values, remove duplicates, cut columns Post 302580066 by krishnix on Wednesday 7th of December 2011 10:35:37 AM
Old 12-07-2011
CSV with commas in field values, remove duplicates, cut columns
Hi

Description of input file I have:
-------------------------
1) CSV with double quotes for string fields.
2) Some string fields have Comma as part of field value.
3) Have Duplicate lines
4) Have 200 columns/fields
5) File size is more than 10GB

Description of output file I need:
-------------------------------
1) Can be of CSV or Pipe delimited
2) But Comma within field value should remain
3) No Duplicate lines
4) I need only first 150 columns

Code I used till now:
-------------------
Code:
cat file.in | awk -F"," '!($1$2$3 in a){a[$1$2$3];print $0}' | cut -d, -f1-150 > file.out

But with this code, comma's within field value is treated as delimiter.
 

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mongoexport

MONGOEXPORT(1)							  Mongo Database						    MONGOEXPORT(1)

NAME

       mongoexport - the Mongo export tool

SYNOPSIS

       mongoexport [OPTIONS]

DESCRIPTION

       mongoexport  is a tool to export a MongoDB collection to either JSON or CSV. The query can be filtered or a list of fields to output can be
       given.

       If the output is CSV, the fields must be specified in order.

EXAMPLES

       mongoexport -d test -c test1 --csv -f name,num
	      export documents from test.test1 in CSV format

OPTIONS

       --help show usage information

       -h, --host HOST
	      server to connect to (default HOST=localhost)

       -d, --db DATABASE
	      database to use

       -c, --c COLLECTION
	      collection to use

       -q, --query QUERY
	      query filter

       -f, --fields FIELDS
	      comma-separated list of field names

       --csv  export to CSV instead of JSON

       -o, --out FILE
	      output file, if not specified, stdout is used

       --dbpath PATH
	      directly access mongod data files in this path, instead of connecting to a mongod instance

COPYRIGHT

       Copyright 2007-2009 10gen

SEE ALSO

       For more information, please refer to the MongoDB wiki, available at http://www.mongodb.org.

AUTHOR

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10gen								     June 2009							    MONGOEXPORT(1)
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