awk to extract the data between Dates - awk

Question

Would like to extract the line items, if the dates between 5th Apr to 10th Apr from second field ($2) . Having many gun zip files into that directory.
Inputs.gz
Des1,DATE,Des1,Des2,Des3
ab,01-APR-15,10,0,4
ab,04-APR-15,25,0,12
ab,05-APR-15,40,0,6
ab,07-APR-15,55,0,6
ab,10-APR-15,70,0,1
ab,11-APR-15,85,0,1
I have tried below command and in-complete
zcat Inputs*.gz | awk 'BEGIN{FS=OFS=","} { if ( (substr($2,1,2) >=5) && (substr($2,1,2) <=10) ) print $0 }' > Output.txt
Expected Output
ab,05-APR-15,40,0,6
ab,07-APR-15,55,0,6
ab,10-APR-15,70,0,1
Please suggest ...

Answer 1

Try this:
awk -F",|-" '$2 >= 5 && $2 <= 10'
It adds the date delimiter to the FS using the -F flag. To ensure that it's APR of 2015, you could separately add tests like:
awk -F",|-" '$2 >= 5 && $2 <= 10 && $3=="APR" && $4==15'
While this makes the date easy to parse up front, if you want to print it out again, you'll need to reconstruct it with something like _date = $2 "-" $3 "-" $4. And if you need to manipulate the data in general, you'd want to add back in the BEGIN {OFS=","} part.
The field numbering I used assumes there are no "-" delimiters in the first field.
I get the following output:
ab,05-APR-15,40,0,6
ab,07-APR-15,55,0,6
ab,10-APR-15,70,0,1
If you have a whole mess of dates and you really only care about the one in the 2nd field via comma delimiters, you could use split like:
awk -F"," '{ split($2, darr, "-") } darr[1] >= 5 && darr[1] <= 10 && darr[2]=="APR" && darr[3]==15'
which is like saying:
for every line, parse the 2nd field into the darr array using the - delimiter
for every line, if the logic darr[1] >= 5 && darr[1] <= 10 && darr[2]=="APR" && darr[3]==15 is true print the whole line.

Answer 2

Another simple solution by using regular expression
awk -F',' '$2 ~ /([0][5-9]|10)-APR-15/{ print $0 }' txt
-F Field separator.
$2 second field
~ match regular expression
'/([0][5-9]|10)-APR-15/` reguler expression to match 05 to 09 or 10
APR-15
Using internal field separator
awk 'BEGIN{ FS="," } $2 ~ /([0][5-9]|10)-APR-15/{ print $0 }' txt
using explicate date number declarations
awk 'BEGIN{ FS="," } $2 ~ /(05|06|07|08|09|10)-APR-15/{ print $0 }' txt