Question 1

How does CSV joining work (VLOOKUP)?

Accepted Answer

Upload two CSV files and select a common key column in each (like an ID or email). The tool matches rows by that key and combines columns from both files, similar to a VLOOKUP in Excel or a JOIN in SQL.

Question 2

What types of joins are supported?

Accepted Answer

The tool supports inner join (only matching rows), left join (all rows from the first file), right join (all rows from the second file), and full outer join (all rows from both files). Unmatched cells are left empty.

Question 3

Can I join CSV files with different column names?

Accepted Answer

Yes. You select the key column from each file independently, so they don't need to have the same name. For example, you can join 'employee_id' from one file with 'id' from another.

Question 4

What if there are duplicate keys in one of the files?

Accepted Answer

If the key column contains duplicates, each duplicate row is matched against the corresponding rows from the other file. This may produce more rows in the output than in either input file, similar to how SQL joins handle duplicates.

CSV Joiner (VLOOKUP)

Frequently Asked Questions

Then send the result straight to Google Sheets