Is there a quick and fast way to determine if a record is duplicated within a list? I have a giant list of about 10000 records and I am afraid that some of them are dupes...
in B1 =Countif(A$1:A$10000,A1) and copy down, afterwards you can sort smallest to largest and you'll have any dups listed after all the once only entries
If you're not able to sort, then again in B1 IF(COUNTIF(A$1:A$10000)>1,A1,"") and you'll get a list of only the dups
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