countif有點象。但因為有成幾百個名字,我不想一個個名字輸進去查,我原來用手工做過,很容易出錯。我想它可以自動產生二個新的column,列出名字和重複的數量
countif有點象。但因為有成幾百個名字,我不想一個個名字輸進去查,我原來用手工做過,很容易出錯。我想它可以自動產生二個新的column,列出名字和重複的數量
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