duplicates - Keep uniqiue email addresses in Excel

Question

I have a spreadsheet which lists the data of 2,000 people from multiple databases.

My spreadsheet lists duplicate email addresses because for example - they may have given their personal address in one database and their personal and work address in another database.

Each person has a row, and I have 6 columns with email addresses. I need to keep only unique email addresses for each person and remove duplicates. Does anyone know how to do this? I have tried removing duplicates, conditional formatting, advanced filter and none of these things seem to suit this scenario.

example data

Answer 1

将以下公式复制到示例中的单元格 H2，然后将其拖到 M 列并一直向下。

=IF(COUNTIF($B2:B2,"="&B2)<2,B2,"FALSE")

这将创建原始 6 列（在 HM）的副本，所有重复项或空单元格都替换为“FALSE”。然后复制和粘贴值，然后就可以了。

说明：对于每个目标单元格，我们检查左侧 6 列单元格的值（H2-->B2）。countif 范围是 B 列到检查的单元格（包括），在同一行中。如果检查的值在范围（本身）中仅出现一次，则将其复制到目标单元格，否则我们设置为 FALSE。