Hi All, I am new to perl and i need to compare two flat files , say file X and file Y.both have similar structure. These files are | delimitted files and have around a million records each.Each record has a key value i.e. the 3rd column of the record. i need to check for all those records which are present in file X and not in file Y and append 'I' to them. Similarly i have to check for all records which are present in file Y and not in file X and append 'D' to them. And also i need to check for all records which are different in file X and file Y and append 'U' to them.there can be any number of fields(columns) in one record(row). Can you please help me here

In reply to file delta detection by Anonymous Monk

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