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Full Discussion: Compare a date (mm/dd/yyyy) with awk
Top Forums UNIX for Beginners Questions & Answers Compare a date (mm/dd/yyyy) with awk Post 303035661 by oldman2 on Thursday 30th of May 2019 11:59:20 AM
Old 05-30-2019
Quote:
Originally Posted by vgersh99
convert MM/DD/YYYY to YYYYMMDD and compare numerically.
I thought about that but I do not have control on the date format in the file and its several thousand lines long. Do you have any suggestions on how to convert the date? Some of the other columns would have dates in them as well. But I am only worried about comparing the data in the 7th column right now and I will process the other dates later once I have narrowed down the file with this command.
 

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LEARN ABOUT OSF1

dp

dp(8)							      System Manager's Manual							     dp(8)

NAME

       dp - parse dates RFC 822-style

SYNOPSIS

       /usr/lib/mh/dp [-form file] [-format string] [-help] [-width columns] dates

OPTIONS

       Overrides  the  default	output format of dp.  The output is formatted according to the instructions in the specified file.  This must be a
       format file; see mh-format(4).  Overrides the default output format of dp.  The output is formatted according to the  instructions  in  the
       specified string.  This must be a format string; see mh-format(4).

	      The argument to the -format option must be interpreted as a single token by the shell that invokes dp. Therefore, you should usually
	      place the argument to this option inside double quotes (").  Prints a list of the valid options  to  this  command.   Specifies  the
	      width of the screen in columns.

       The defaults for this command are as follows:

       -width defaults to the width of the terminal

DESCRIPTION

       The dp command parses dates according to the ARPA Internet standard.  It also understands many non-standard formats, such as those produced
       by TOPS-20 sites and some UNIX sites using ctime(3). It is useful for seeing how MH will interpret a date.

       The dp program treats each argument as a single date, and prints the date out in the official RFC 822 format. Hence, it is usually best	to
       enclose each argument in double quotes (") for the shell.

EXAMPLES

       This is the default format string used by dp:

       %<(nodate{text})error: %{text}%|%(pretty{text})%>

       When an error is detected, this prints error: and the date that is in error. Otherwise, it outputs the proper RFC 822 format of the date.

FILES

       User profile.

SEE ALSO

       Commands: ap(8)

       Standard for the Format of ARPA Internet Text Messages (RFC 822)

																	     dp(8)
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