Excel Formula to compare two columns for values, if none populate with data from 3rd column

Excel is a powerful tool that allows you to perform various calculations and comparisons on your data. One common task that you may encounter is comparing two columns for values and populating a third column with data if there are no matches. In this article, we will explore how to achieve this using Excel formulas.

Comparing Two Columns for Values

Let's say you have two columns in your Excel spreadsheet, Column A and Column B, and you want to compare the values in these columns. You can use the =IF() function along with the =VLOOKUP() function to achieve this.

The =IF() function allows you to perform a logical test and return different values based on the result of that test. The =VLOOKUP() function, on the other hand, allows you to search for a value in a range and return a corresponding value from another column.

Here's an example formula that compares the values in Column A and Column B:

In this formula, A1 represents the cell in Column A that you want to compare, and B:B represents the range of values in Column B. The 1 specifies that you want to return the value from the first column in the range, and FALSE ensures an exact match.

If the value in Column A matches any value in Column B, the formula will return "Match". If there is no match, it will return "No Match". You can drag this formula down to apply it to all the cells in the third column.

Populating with Data from a Third Column

Now, let's say you have a third column, Column C, and you want to populate it with data from Column B if there is no match between Column A and Column B. You can modify the previous formula to achieve this.

Here's an example formula that populates Column C with data from Column B if there is no match:

In this formula, VLOOKUP(A1,B:B,2,FALSE) is used as the value_if_false argument in the =IF() function. This means that if there is no match, it will return the corresponding value from the second column in the range.

Again, you can drag this formula down to apply it to all the cells in Column C.

Putting It All Together

Now that you understand how to compare two columns for values and populate a third column with data, let's put it all together in a step-by-step example:

1. Open your Excel spreadsheet and locate the columns you want to compare.
2. In the first cell of the third column, enter the formula =IF(VLOOKUP(A1,B:B,1,FALSE)=A1,"Match","No Match").
3. Drag the formula down to apply it to all the cells in the third column.
4. In the first cell of the third column, enter the modified formula =IF(VLOOKUP(A1,B:B,1,FALSE)=A1,VLOOKUP(A1,B:B,1,FALSE),VLOOKUP(A1,B:B,2,FALSE)).
5. Drag the formula down to apply it to all the cells in the third column.

By following these steps, you will be able to compare two columns for values and populate a third column with data if there are no matches.

Conclusion

Excel formulas provide a powerful way to compare columns and perform calculations on your data. By using the =IF() and =VLOOKUP() functions, you can easily compare two columns for values and populate a third column with data if there are no matches. Remember to adjust the formula based on the specific columns and ranges in your spreadsheet.

References

Explore more articles on tech support and Excel formulas to enhance your productivity and troubleshoot common issues.