Query the contents of a file using another file in AWK - awk

Question

I am trying to conditionally filter a file based on values in a second file. File1 contains numbers and File2 contains two columns of numbers. The question is to filter out those rows in file1 which fall within the range denoted in each row of file2.
I have a series of loops which works, but takes >12hrs to run depending on the lengths of both files. This code is noted below. Alternatively, I have tried to use awk, and looked at other questions posted on slack overflow, but I cannot figure out how to change the code appropriately.
Loop method:
while IFS= read READ
do
position=$(echo $READ | awk '{print $4}')
while IFS= read BED
do
St=$(echo $BED | awk '{print $2}')
En=$(echo $BED | awk '{print $3}')
if (($position < "$St"))
then
break
else
if (($position >= "$St" && $position <= "$En"));
then
echo "$READ" | awk '{print $0"\t EXON"}' >> outputfile
fi
fi
done < file2
done < file1
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awk -v FS="[ =]" 'NR==FNR{rows[$1]++;next}(substr($NF,1,length($NF)-1) in rows)' File1 File2
file1: (tab delimited)
AAA BBB 1500
CCC DDD 2500
EEE FFF 2000
file2: (tab delimited)
GGG 1250 1750
HHH 1950 2300
III 2600 2700
Expected output would retain rows 1 and 3 from file1 (in a new file, file3) because these records fall within the ranges of row 1 columns 2 and 3, and row 2 columns 2 and columns 3 of file2. In the actual files, they're not row restricted i.e. I am not wanting to look at row1 of file1 and compare to row1 of file2, but compare row1 to all rows in file2 to get the hit.
file3 (output)
AAA BBB 1500
EEE FFF 2000

Answer 1

One way:
awk 'NR==FNR{a[i]=$2;b[i++]=$3;next}{for(j=0;j<i;j++){if ($3>=a[j] && $3<=b[j]){print;}}}' i=0 file2 file1
AAA BBB 1500
EEE FFF 2000
Read the file2 contents and store it in arrays a and b. When file1 is read, check for the number to be between the entire a and b arrays and print.
One more option:
$ awk 'NR==FNR{for(i=$2;i<=$3;i++)a[i];next}($3 in a)' file2 file1
AAA BBB 1500
EEE FFF 2000
File2 is read and the entire range of numbers is broken up and stored into the associate array a. When we read the file1, we just need to lookup the array a.

Answer 2

Another awk. It may or may not make sense depending on the filesizes:
$ awk '
NR==FNR {
a[$3]=$2 # hash file2 records, $3 is key, $2 value
next
}
{
for(i in a) # for each record in file1 go thru ever element in a
if($3<=i && $3>=a[i]) { # if it falls between
print # output
break # exit loop once match found
}
}' file2 file1
Output:
AAA BBB 1500
EEE FFF 2000