How to compare 2 files using Oracle,

Hi,
I've a task to compare 2 files of 2 different sets.
in Set 1 I've approx 50,000-70,000 files
similarly in set 2 also contains same 50,000-70,000 files
so I've compare file 1 of set 1 with all files of Set 2 and store the log of mismatch.
And repeat the same for remaining files of set 1.
So in such a scenario I've to accomplish a search of 50,000x50,000 times. It is very huse if I do a line wise matching after storing the file in the database table.
Can I use Clob for comparing the files, or there is any other mechanism pls let me know.
Thanks & regards/
Goutam

Difference bteween XML
Probably other examples exist in this forum or that forum too but I didn't search.

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