Matching data between two sheets and copy to location - excel

Question

This is the scenario:
two worksheets - Sheet1 & Sheet2
Sheet1 has everything Sheet2 has and more
I am looking to find an exact match in Sheet1 Column A and B to data in Sheet2 Columns A and B (row location will always be different than Sheet1) and then copy the contents of column C from sheet 1 to the appropriate row in Sheet2 column C.
I have tried multiple Match statements. I am getting all kinds of errors and cannot even get an incorrect result.
Sheet1 is the primary table. Sheet2 is a subset of data from Sheet1 (the results of a pivot table drill-down. The idea is to look at each row, columns A & B in Sheet2 and find a match in Cols A & B of Sheet1. Then copy the value from the same row in column C to the corresponding row in Sheet2.
This was one attempt:
Sub match_1()
Sheets("Sheet2").Range("A2:B2").Value = WorksheetFunction.Match( _
Sheets("Sheet1").Range("A2").Value, _
Sheets("Sheet1").Range("A:B"), _
0)
End Sub
Sheet1:
Sheet2:

Answer 1

There are three problems with how you are using the Match function:
Match expects a single row or column of data in the second argument. You have passed it 2 columns, so it will always return a #N/A error
Match returns the item number within the Row/Column which matches the first argument. You then need to use Index or Range or Cell to get the value.
Match does not match multiple columns. I explain here how to do this match without VBA
Using my example from Point 3, here is some code to achieve your aim:
Sub matchValues()
Dim calculation As XlCalculation, screenUpdating As Boolean
calculation = Application.calculation: Application.calculation = xlCalculationManual
screenUpdating = Application.screenUpdating: Application.screenUpdating = False
Dim rCaseLink As Range
With Worksheets("Sheet2")
Set rCaseLink = .Range(.Cells(2, 3), .Cells(.Rows.Count, 2).End(xlUp).Offset(0, 1))
End With
With rCaseLink
'This formula will pull back the Value for Column C based on A and B
.Formula = "=INDEX(Sheet1!$C$2:$C$999, AGGREGATE(15, 6, ROW(Sheet1!$A$2:$A$999)/(--(Sheet1!$A$2:$A$999=$A2)*--(Sheet1!$B$2:$B$999=$B2)), 1)-1, 1)"
.Calculate
.Value = .Value 'This will flatten the value, so that it is no longer a formula
End With
'Reset Excel
Application.calculation = calculation
Application.screenUpdating = screenUpdating
End Sub