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awk, associative array, compare files

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Top Forums Shell Programming and Scripting awk, associative array, compare files
# 1  
Old 10-18-2011
Bug awk, associative array, compare files
i have a file like this
Code:
< '393200103052';'H3G';'20081204'
< '393200103059';'TIM';'20110111'
< '393200103061';'TIM';'20060206'
< '393200103064';'OPI';'20110623'
> '393200103052';'HKG';'20081204'
> '393200103056';'TIM';'20110111'
> '393200103088';'TIM';'20060206'

Now i have to generate a file which should have records like this
For: '393200103052' filed 2 differs :'H3G' 'HKG'
I have to genreate one more file like this,these are the records which are not exist with '>' symbol
Code:
< '393200103059';'TIM';'20110111'
< '393200103061';'TIM';'20060206'
< '393200103064';'OPI';'20110623'

if anyone help,advance thankful
Moderator's Comments:
Mod Comment Please use code tags when posting data and code samples!
Last edited by vgersh99; 10-18-2011 at 02:13 PM.. Reason: code tags, please!
# 2  
Old 10-18-2011
It's better to post a descriptive topic than "help needed please".

Quote:
Now i have to generate a file which should have records like this
For: '393200103052' filed 2 differs :'H3G' 'HKG'
What rationale picks out H3G and HKG as different? They look the same to me.

How should the program be able to know which records don't exist? Is there some other file which contains all the records which must exist?
# 3  
Old 10-18-2011
Network
I had following two files file1.txt and file2.txt
File1.txt
Code:
Field1|Filed2|Filed3
'393200103001';'TIM';'20080205'
'393200103017';'TIM';'20040521'
'393200103025';'OPI';'20041025'
'393200103032';'OPI';'20080218'
'393200103048';'OPI';'20101122'
'393200103052';'H3G';'20081204'
'393200103059';'TIM';'20110111'
'393200103061';'TIM';'20060206'
'393200103064';'OPI';'20110623'

File2.txt
Code:
Field1|Filed2|Filed3
'393200103001';'TIM';'20080205'
'393200103017';'TIM';'20040521'
'393200103025';'OPI';'20041025'
'393200103032';'OPI';'20080218'
'393200103048';'OPI';'20101122'
'393200103052';'HKG';'20081204'
'393200103056';'TIM';'20110111'
'393200103088';'TIM';'20060206'

My requirement is that i have to generate three more files like
missed_file1.txt-which should have the records missing that are in file2 but not in file1.
missed_file2.txt--which should have the records missing that are in file1 but not in file2.
common.txt- which should have like this
For '393200103052' filed2 differs file1:'H3G' file2:'HKG'

I think its more clear.I had done the thing but problem was my script is working fine for small files but original files have millions of records.so its taking very much time.

---------- Post updated at 12:26 PM ---------- Previous update was at 12:22 PM ----------
Code:
awk -F '[;$]+' '
        # load first file into array indexed by field 1
        NR == FNR {
                for (i=2; i<=NF; i++) {
                         file1[$1,$2,$3,i] = $i 
                }
                # store the number of fields for this index
                file1nf[$1] = NF
                next
        }
        {
                if (!file1nf[$1]) {
                             print ""$1";"$2";"$3"" >> "missed_file1.txt"
                            next
                }
                    }
' file1.txt file2.txt

same script i had used to generate missed_file2.txt by changing the last line like thsi
file2.txt file1.txt
Last edited by Scott; 10-18-2011 at 02:30 PM.. Reason: Use code tags, please...
# 4  
Old 10-18-2011
Code:
awk -F \; 'NR==FNR{a[$1];next} !($1 in a)' file1.txt file2.txt > missed_file1.txt

'393200103056';'TIM';'20110111'
'393200103088';'TIM';'20060206'

awk -F \; 'NR==FNR{a[$1];next} !($1 in a)' file2.txt file1.txt > missed_file2.txt

'393200103059';'TIM';'20110111'
'393200103061';'TIM';'20060206'
'393200103064';'OPI';'20110623'

awk -F \; 'NR==FNR{a[$1]=$2;next} $1 in a && a[$1]!=$2{print $1, $2,a[$1]} '  file2.txt file1.txt  > common.txt

'393200103052' 'H3G' 'HKG'

# 5  
Old 10-18-2011
Code:
awk -F \; 'NR==FNR{a[$1];next} !($1 in a)' file1.txt file2.txt > missed_file1.txt

'393200103056';'TIM';'20110111'
'393200103088';'TIM';'20060206'

awk -F \; 'NR==FNR{a[$1];next} !($1 in a)' file2.txt file1.txt > missed_file2.txt

'393200103059';'TIM';'20110111'
'393200103061';'TIM';'20060206'
'393200103064';'OPI';'20110623'

awk -F \; 'NR==FNR{a[$1]=$2;next} $1 in a && a[$1]!=$2{print $1, $2,a[$1]} '  file2.txt file1.txt  > common.txt

'393200103052' 'H3G' 'HKG'

# 6  
Old 10-19-2011
Network thank you
Its really working awesome.But my question is my original file1.txt and file2.txt have records in millions,so does it take huge time or efficient enough.

---------- Post updated at 11:21 PM ---------- Previous update was at 11:12 PM ----------

i need to compare the same for filed3 also.Iam java developer so no idea about shell script please help me regarding this also.I mean to say if filed3 filed2 changes i need to show both changes.
File1.txt
'393200103088';'TIM';'20060207'
File2.txt
'393200103088';'TIM';'20060208'
common.txt(Filed3 has changed for filed1)
'393200103088' '20060201' '2006208'

---------- Post updated at 11:39 PM ---------- Previous update was at 11:21 PM ----------

I had generated file3.txt by the following command.
diff file1.txt file2.txt > file3.txt
If you look into file3.txt
The records missing from file2 started with < symbol.
And the records missing from file1 started with > symbol.
And it also has coommon records(coomon first field)using this i have to generate same three files as i have mentioned in previous thread.
1.misssed_file1.txt
2.missed_file2.txt
3.common.txt
< '393200103052';'H3G';'20081204'
< '393200103059';'TIM';'20110111'
< '393200103061';'TIM';'20060206'
< '393200103064';'OPI';'20110623'
> '393200103052';'HKG';'20081204'
> '393200103056';'TIM';'20110111'
> '393200103088';'TIM';'20060206'
I think here > and < symobls are helpful to generate required files.
please help me regarding this.

---------- Post updated 10-19-11 at 12:23 AM ---------- Previous update was 10-18-11 at 11:39 PM ----------

my orginial file sizes
file1.txt-604 mb
file2.txt-422 mb
i had tested your code with original files its taking much time to process the files.please help me how i can optimize time.
# 7  
Old 10-19-2011
How long is it taking? You aren't going to process 600mb of data in a split second.
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