IMPORTING 3 CSV FILES AS INPUT WITH BROWSE BUTTON COMPARING 3 CSV FILES

I HAVE 3 .CSV FILES WHICH ARE MY INPUT
1. TRUE FILE
2. LIMIT FILE
3. REFERENCE FILE
I want to compare limit file and true file and delete some columns from true file and for rest of the columns calculate mean,standard deviation how do I approach the problem

if possible, best thing would be bring the contents to staging tables and do comparison in sql. This would have the advantage of ability to apply set based logic and would be much better from performance perspective rather than trying to do this directly
from the file.
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

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