excel - Comparing data on two spreadsheets -
i have data in 2 spreadsheets. in column of both spreadsheets customer numbers. need find customer numbers in sheet 2 in sheet 1. how best this? using countif guess. have used in past many moons ago , struggling recall how to!
in sheet 2, use formula: =not(isna(match(sheet2!a1,sheet1!a:a,0))) , copy formula down.
for each item in sheet 2, check if in sheet 1 , return true or false.
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