VBA macro to combine two sheets on unique id - excel

Question

I have two sheets in Excel workbook.
The first sheet has
1) Customer ID – unique values for each customer.
2) Question ID – unique id for each question
3) Questions
Customer ID Question ID question
1 34 name
1 45 company
2 34 name
2 45 company
3 34 name
3 45 company
4 34 name
4 45 company
5 34 name
5 45 company
The second sheet has three columns
1) Customer ID – unique values for each customer.
2) Question ID – unqiue id for each question
3) Questions
Customer ID Question ID Answer
1 34 Amy
1 45 GEICO
2 34 Steph
3 34 Anna
3 45 GEICO
4 34 Adam
5 34 Mark
5 45 AAA
In this sheet, not every customer id and Question ID in sheet one will have answers in the sheet 2
Sheet 3 Expected Output
I wanted to do a vba macro to combine both sheet1 and sheet2 and have all the columns. For any customer id, if there is no answer for a question, that field should be left blank.
Expected Output in Sheet3
Customer ID Question ID question Answer
1 34 name Amy
1 45 company GEICO
2 34 name Steph
2 45 company
3 34 name Anna
3 45 company GEICO
4 34 name Adam
4 45 company
5 34 name Mark
5 45 company AAA

Answer 1

There are several ways this can be done without writing code.
Below is one method off the top of my head. Others include the built-in query editor (Get & Transform), or PivotTables and others ways to consolidate data in multiple worksheets.
On Sheet2, first set up a "helper column" since there are multiple columns you want to match. In this example the formula is: =C2&D2 starting in Cell B2.
...then, in Sheet1 (cell E2 in the example), use a formula like:
=IFERROR(VLOOKUP(B2&C2,Sheet2!$B$1:$E$9,4,FALSE),"")
Both formulas get copied or "dragged" down as far as necessary and obviously the formula adjusted to refer to the correct cells.
No third worksheet is necessary but if you want you can start by copying Sheet1 to Sheet3.
More Information:
Microsoft Support : VLOOKUP Function
Microsoft Support : Lookup & Reference Functions
Microsoft Support : IFERROR Function