If you have this text file with two columns, first with key, second with value:
osc;value
476;56
113;102
272;32.5
This VBA macro code enables to load data, check key comparing with first
A column, if key is equal (exactly, if starts with key), then fill value into column
R.
Sub Import()
Dim file As String
Dim counter As Integer
Dim arr() As String
Dim key As String
Dim rngFound As Range
Dim sheet As Worksheet
Dim cell As Object
file = Application.GetOpenFilename("Data files (*.txt),*.txt", Title:="Select file")
If file = "False" Then Exit Sub
' Open file for reading
Set sheet = ActiveSheet
counter = 1
Open file For Input As #1
Do Until EOF(1)
Line Input #1, textline
' Header - omit it
If counter <> 1 Then
arr = Split(textline, ";")
' Find row key value
For Each cell In sheet.UsedRange.Rows
key = sheet.Cells(cell.Row, "A").Value
If key <> "" Then
If key Like arr(0) + "*" Then
sheet.Cells(cell.Row, "R") = arr(1)
End If
End If
Next cell
' MsgBox (arr(0) + "=" + arr(1))
End If
counter = counter + 1
Loop
Close #1
MsgBox ("Hotovo")
End Sub
Output: