在 Excel 的单元格 C1 中，如何从单元格 B1 的逗号分隔值列表中未找到 A 列中的逗号分隔单元格/值？

Question

在 Excel 的单元格 C1 中，如何使用公式从 A 列的所有行中选择所有缺失单元格的逗号分隔字符串，这些值在单元格 B1 的逗号分隔值列表中找不到？

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Answer 1

一个公式解决方案

在 C1 中，输入数组公式（Ctrl+Shift+Enter）：

=TEXTJOIN(",",1,IF(ISERR(SEARCH(A1:A6,B1)),A1:A6,""))

Answer 2

尝试以下用户定义函数：

Option Explicit

Public Function WhatsMissing(rng As Range, css As String) As String
    Dim rngT As Range, ws As Worksheet, cssT As String
    Dim r As Range, v As String, vT As String
    
    Set ws = rng.Parent
    Set rngT = Intersect(rng, ws.UsedRange)
    
    cssT = "," & css & ","
    WhatsMissing = ""
    
    For Each r In rngT
        v = r.Value
        If v <> "" Then
            vT = "," & v & ","
            If InStr(cssT, vT) = 0 Then
                WhatsMissing = WhatsMissing & v & ","
            End If
        End If
    Next r
    
    WhatsMissing = Mid(WhatsMissing, 1, Len(WhatsMissing) - 1)
End Function

示例：