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Using The Match Function To Look Up Values

For the most advanced book covering the Match function and how to use it to speed even your most demanding applications, Rich's latest book is available through Amazon.com. It includes a bonus application with code and examples you can copy for your own development efforts.

Power-Up Using Excel VBA Sorts and Searches

The Match Function provides flexible features and speed that make it the desired method of looking up values for codes. Suppose you import a worksheet that has only employee numbers, and you want to include the employee name in the report. You can create another worksheet to work as a translation table that contains both the employee number and the employee name.

The match function returns the position of the value in the translation table. So, for example, lets say that your employee translation table starts in row 5 and goes to row 11. If you find a match on the first employee, it will return "1" as the position, not "5". In other words, it returns the position relative to the searched range, not the worksheet. For this reason, you need to add the offset to arrive at the position of the matching entry relative to the worksheet. In this example, you would add 4 to the matching position.

A parameter of "1" in the match function acts in the following manner: The Match function will find the largest value that is less than or equal to your requested value. You should be sure to sort your array in ascending order. Using a parameter value of "1" provides the fastest search because the array is sorted, but since it does not guarantee an exact match, you must check to see if the search value matches the found value, and the code below illustrates.

This simplified example shows how the function works, but in an actual application, it is a good idea to take these steps:

(1) Either sort or sequence check the translation table
(2) If the searched column has both numbers and text, be sure to convert numbers to text and resort
(3) Count the rows of the translation table so that the length can be dynamic as new codes are added by the user

Program Code

Option Explicit

Public Sub FindMatching()
' ********************************************************
' Use The Match Function To Look Up An Employee Name
' From A Table Of Employee Numbers and Names
' ********************************************************
Dim shtEmployeeData As Worksheet
Dim shtEmployeeTable As Worksheet
Dim strEmployeeNumber As String
Dim strEmployeeName As String
Dim rngEmployeeNumbers As Range
Dim rngSearchTable As Range
Dim C As Range
Dim varMatchPosition As Variant

Set shtEmployeeData = Sheets("Sheet1")
Set shtEmployeeTable = Sheets("Sheet2")

' ************************************************************
' For This Example, Let's Assume:
' (1) rngEmployeeNumbers Contains A Range Of Employee Numbers
' (2) rngSearchTable Contains The Translation Table From
'     Employee Number to Employee Name Sorted By Employee
'     Number in ASCII Order
' ************************************************************

' ********************************************************
' B3:B14 Contain The Employee Numbers We Want To Translate
' ********************************************************
Set rngEmployeeNumbers = Range(shtEmployeeData.Range("B3"), shtEmployeeData.Range("B14"))

' ********************************************************
' E5:E11 Contain The Translation Table Employee Numbers
' In Ascending Sequence, And F5:F11 Contain
' The Corresponding Employee Name
' ********************************************************
Set rngSearchTable = Range(shtEmployeeTable.Range("E5"), shtEmployeeTable.Range("E11"))

' ********************************************************
' Since varMatchPosition Points To The Position In The
' Search Range, If The Range Does Not Start In Row 1, Then
' Add The Number Of Rows Above The Search Range To Find
' The Actual Row Number - In This Case 4 Rows
' ********************************************************

On Error Resume Next
For Each C In rngEmployeeNumbers
    strEmployeeNumber = C.Value
    varMatchPosition = Application.WorksheetFunction.Match(strEmployeeNumber, rngSearchTable, 1)
    If Err.Number = 1004 Or Err.Number = 438 Then
        strEmployeeName = "Not Found"
    ElseIf strEmployeeNumber = shtEmployeeTable.Cells(varMatchPosition + 4, 5).Value Then
        strEmployeeName = shtEmployeeTable.Cells(varMatchPosition + 4, 6).Value
        strEmployeeName = "Not Found"
    End If
' ********************************************************
' Add The Employee Name Next To The Employee Number
' ********************************************************
    C.Offset(0, 1).Value = strEmployeeName
Next C

On Error GoTo 0

End Sub

Example 2:  Look at EVERY entry... The table to be searched does not need to be in order

Public Sub FindMatching()
' ********************************************************
' Look Up Body Code From Style/Color
' ********************************************************
Dim shtSHP300 As Worksheet
Dim shtStyleColor As Worksheet

Dim strStyleColor As String
Dim strBodyCode As String

Dim rngSHP300 As Range
Dim rngStyleColor As Range

Dim C As Range
Dim varMatchPosition As Variant

Set shtSHP300 = Sheets("SHP300")
Set shtStyleColor = Sheets("StyleColor")

Set rngSHP300 = Range(shtSHP300.Cells(2, 49), shtSHP300.Cells(4606, 49))
Set rngStyleColor = Range(shtStyleColor.Cells(2, 1), shtStyleColor.Cells(2239, 1))

On Error Resume Next
For Each C In rngSHP300
    strStyleColor = C.Value
    varMatchPosition = Application.WorksheetFunction.Match(strStyleColor, rngStyleColor, 0)
    If Err.Number = 1004 Or Err.Number = 438 Then
        shtSHP300.Cells(C.Row, 50) = ""
    Else: shtSHP300.Cells(C.Row, 50) = shtStyleColor.Cells(varMatchPosition + 1, 4).Value
    End If
Next C

On Error GoTo 0

End Sub