Excel表二日期列A列对应的B列等于表一日期列C列中同一日期对应的D列的值？

1、如果你的EXCEL支持TEXTJOIN函数，就可以直接用数组公式计算，如图B列

B2公式：=TEXTJOIN("+",TRUE,IF(表一!$A$2:$A$8=A2,表一!$B$2:$B$8,""))

按Ctrl+Shift+Enter组合键输入。

2、如果不支持以上函数，可以编写自定义函数完成，按ALT+F11组合键，打开VB窗口，执行"插入"-"模块"，复制下面代码进去，回到工作表，像使用普通公式一样使用它，如C2公式：=JOINIF(表一!$A$2:$A$8,A2,表一!$B$2:$B$8)

代码如下：

Function JOINIF(Rng1 As Range, Str, Rng2 As Range)

    Dim arr, brr

    Dim i As Long

    Dim j As Long

    Dim MyStr As String

    If Rng1.Rows.Count > 65536 Then

        arr = Rng1.Resize(65536, Rng1.Columns)

        brr = Rng2.Resize(65536, Rng1.Columns)

    Else

        arr = Rng1

        brr = Rng2

    End If

    For i = 1 To UBound(arr)

        For j = 1 To UBound(arr, 2)

            If arr(i, j) <> "" Then

                If arr(i, j) = Str Then

                    MyStr = MyStr & brr(i, j) & "+"

                End If

            Else

                Exit For

            End If

        Next j

    Next i

    JOINIF = Left(MyStr, Len(MyStr) - 1)

End Function