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Full Discussion: Merging 2 text files when there is a common time stamp column in them
Top Forums Shell Programming and Scripting Merging 2 text files when there is a common time stamp column in them Post 302798657 by ks_reddy on Thursday 25th of April 2013 02:31:01 AM
Old 04-25-2013
Merging 2 text files when there is a common time stamp column in them
Dear Unix experts and users

I have 2 kinds of files like below, of which I need to merge them in the order of time.
File1:
Code:
   Date_Time            Context  D1  D2
 04/19/2013_23:48:54.819    ABCD   x     x
 04/19/2013_23:48:55.307    ABCD   x     x
 04/19/2013_23:48:55.823    ABCD   x     x
 04/19/2013_23:48:56.309    ABCD   x     x

Data columns from file1 are indicated with 'x'.

File2:
Code:
         Date_Time       Context D3  D4
 04/19/2013_23:48:54.819     ABCD   y      y
 04/19/2013_23:48:55.821     ABCD   y      y
 04/19/2013_23:48:56.799     ABCD   y      y
 04/19/2013_23:48:57.819     ABCD   y      y


Data columns from file2 are indicated with 'y'.

Here except the first entry from Date_Time column in both files all rest of the time stamp entries are different.
My result (or merged) file should be like below.

Code:
Required output

            Date_Time          Context       D1    D2    D3    D4
04/19/2013_23:48:54.819    ABCD    x    x    blank    blank
04/19/2013_23:48:54.819    ABCD    blank    blank    y    y
04/19/2013_23:48:55.307    ABCD    x    x    blank    blank
04/19/2013_23:48:55.821    ABCD    blank    blank    y    y
04/19/2013_23:48:55.823    ABCD    x    x    blank    blank
04/19/2013_23:48:56.309    ABCD    x    x    blank    blank
04/19/2013_23:48:56.799    ABCD    blank    blank    y    y
04/19/2013_23:48:57.819    ABCD    blank    blank    y    y

So describe the output it is sorted by time stamp but the sorting should preserve the position of other column data cells and we should include blanks where where the other file data doesn't exist. The context data field(s) should be as it is between and print int he output.
By the way my files are of .csv type.
Please revert to me if my problem description is not clear.

Thanks
Sidda
Last edited by ks_reddy; 04-25-2013 at 04:00 AM.. Reason: Column names and data aligned
 

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LEARN ABOUT OSX

memberd

dsmemberutil(1) 					    BSD General Commands Manual 					   dsmemberutil(1)

NAME

     dsmemberutil -- various operations for the membership APIs, including state dump, check memberships, UUIDs, etc.

SYNOPSIS

     dsmemberutil [-v] [-h] command [options]

DESCRIPTION

     dsmemberutil is a program that implements the membership API calls in a command line utility.

FLAGS

     A list of flags and their descriptions:

     -h      Lists the options for calling dsmemberutil

     -v      Causes dsmemberutil to operate in verbose mode.

COMMANDS

     The action of each command is described below:

     getuuid -ugUGsS value
		 Takes any of the options and returns the associated UUID.

     getid -UGsSX value
		 Takes any of the options and returns the associated UID or GID depending on option provided.

     getsid -ugUGX value
		 Takes any of the options and returns the associated SID.

     checkmembership -uUxs param -gGXS param
		 Returns if a user or group with the associated option is a member of the group.

     flushcache  Flushes the current membership cache.

     Legacy commands such as dumpstate and statistics are gone. See odutil(1) for show cache and statistics operations.

     A list of options available. In some cases -xX and -sS can be used synonymously due to nature of the value.

     -u uid	      Using user with UID

     -U name	      Using user with name

     -s sid	      Using user with SID

     -x uuid	      Using user with UUID

     -g gid	      Using group with GID

     -G name	      Using group with name

     -S sid	      Using group with SID

     -X uuid	      Using group with UUID

EXAMPLES

     Get a user's uuid:
		    % dsmemberutil getuuid -u 501
		    EEA4F2F6-B268-49E7-9C6F-E3C4A37DA4FD

     Get a group's uuid
		    % dsmemberutil getuuid -g 0
		    ABCDEFAB-CDEF-ABCD-EFAB-CDEF00000000

     Get a user's or group's id from a uuid
		    % dsmemberutil getid -X ABCDEFAB-CDEF-ABCD-EFAB-CDEF0000000C
		    gid: 12

     Check a user's membership in a group (using UID and GID)
		    % dsmemberutil checkmembership -u 501 -g 0
		    user is not a member of the group

     Check a user's membership in a group (using names)
		    % dsmemberutil checkmembership -U root -G wheel
		    user is a member of the group

SEE ALSO

     odutil(1), dseditgroup(1), dscacheutil(1)

Darwin								    Jan 1, 2007 							    Darwin
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