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隨手寫 December 22, 2021 at 12:30PM

Excel 當中要看一個儲存格出現「幾次」用 B2=COUNTIF(A:A,A2)

計算出現「第幾次」（流水號）
B2=COUNTIF(A$2:A2,A2)

countif 固定列號後，一路往下拉，會越來越難計算，建議排序 A 欄之後改用 if 來判斷。

B2=if(A2=A1,B1+1,1)
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隨手寫 December 22, 2021 at 12:30PM

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