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Full Discussion: Grouping and Subgrouping using awk
Top Forums Shell Programming and Scripting Grouping and Subgrouping using awk Post 302953778 by hemanty4u on Tuesday 1st of September 2015 10:56:01 AM
Old 09-01-2015
Thanks All

In relation to the same data file, I am trying to group using the command I mentioned above

Code:
awk -F "|" '{while ($1>=t*w) t++; A[t]++} END {for (i=1;i<=t;i++) print "    "strftime("%F %T",(i-1)*w)" to "strftime("%F %T",i*w-1)"|"(A[i])}' w=3600 ${work_file} |tail

This code behaves correctly for small set data in a file
The moment the data is like some 2M records, it does not throw correct results

For example in the same data example above, when I run it over 2M records, I get the output as this way

Code:
    2015-09-01 00:00:00 to 2015-09-01 00:59:59|377387
    2015-09-01 01:00:00 to 2015-09-01 01:59:59|372157
    2015-09-01 02:00:00 to 2015-09-01 02:59:59|386135
    2015-09-01 03:00:00 to 2015-09-01 03:59:59|335708
    2015-09-01 04:00:00 to 2015-09-01 04:59:59|382802
    2015-09-01 05:00:00 to 2015-09-01 05:59:59|6449915

The last count 6449915 is actually not correct
It is displayed as
Code:
Total records in the file minus (sum of 377387 + 372157 + 386135 + 335708 + 382802) which is visually not correct at all

Last edited by hemanty4u; 09-01-2015 at 11:57 AM.. Reason: Missed some statements
 

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LEARN ABOUT PHP

dbplus_find

DBPLUS_FIND(3)								 1							    DBPLUS_FIND(3)

dbplus_find - Set a constraint on a relation

SYNOPSIS

       int dbplus_find (resource  $relation, array  $constraints, mixed  $tuple)

DESCRIPTION

	Places a constraint on the given $relation.

	Further calls to functions like dbplus_curr(3) or dbplus_next(3) will only return tuples matching the given constraints.

PARAMETERS

	      o $relation
		- A relation opened by dbplus_open(3).

	      o $constraints
		-  Constraints are triplets of strings containing of a domain name, a comparison operator and a comparison value. The $constraints
		parameter array may consist of a collection of string arrays, each of which contains a domain, an operator and a value,  or  of  a
		single	string	array containing a multiple of three elements.	The comparison operator may be one of the following strings: '==',
		'>', '>=', '<', '<=', '!=', '~' for a regular expression match and 'BAND' or 'BOR' for bitwise operations.

	      o $tuple
		-

RETURN VALUES

NOTES

       Warning

	      This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice	in
	      a future release of PHP. This function should be used at your own risk.

SEE ALSO

       dbplus_unselect(3).

PHP Documentation Group 													    DBPLUS_FIND(3)
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