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Comparing two huge files

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Hi, As per my requirement, I need to take difference between two big files(around 6.5 GB) and get the difference to a output file without any line numbers or '<' or '>' in front of each new line. As DIFF command wont work for big files, i tried to use BDIFF instead. I am getting incorrect number of records. I have done the following test: I have got a dat file with a few million records in it and to generate a another file i have used sed '1,100d' oldfile > newfile so i am using Bdiff oldfile newfile | sed -n '/^</p' > DIFF.DAT The output(DIFF) should be having 100 records in it. But i am getting an output with several records in it. Could anyone help me out from this situation? Thanks Sue

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Any Suggestions please?

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combining multiple files

sqlplus from unix shell

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