Vlookup to find missing data in 2 columns

Vlookup to find out missing data in 2 columns. How to do a vlookup to find missing data. How to use vlookup to find missing data. How to use vlookup to find missing values. When you are working with data in Excel, sooner or later you will need to compare data. This could be comparing two columns or even data in different worksheets/workbooks. ................
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