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i think you were not clear with requirement

HI ahamed101 (https://www.unix.com/members/302048505.html),
I had two files say file1.txt file2.txt

file1.txt

'393200103001';'TIM';'20080205'
'393200103025';'OPI';'20041025'...

I have a file having records like below

Field1;Filed2;Filed3
< '393200103052';'H3G';'20081204'
< '393200103059';'TIM';'20110111'
< '393200103061';'TIM';'20060206'
<...

time taken to process the large for files for just to generate missed_file1.txt taken 9hours.so i need very efficient process using file3.txt can you please help if possible.

no iam not able to procces in split second.I have started process one hour back its still in process.For missed_file1.txt genearation its self is in still process.

awk -F \; 'NR==FNR{a[$1];next}...

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...

I had following two files file1.txt and file2.txt
File1.txt
Field1|Filed2|Filed3
'393200103001';'TIM';'20080205'
'393200103017';'TIM';'20040521'
'393200103025';'OPI';'20041025'...

i have a file like this
< '393200103052';'H3G';'20081204'
< '393200103059';'TIM';'20110111'
< '393200103061';'TIM';'20060206'
< '393200103064';'OPI';'20110623'
> '393200103052';'HKG';'20081204'...