I need help writing a formula. I am trying to update one worksheet based on a matching column from another worksheet.

Worksheet 1: ecEveryoneElse
The NewUserName column in this worksheet contains the new data. There are 98000 records in this worksheet.
Code:
+---------------+---------------+
| A | B |
+---------------+---------------+
| UserName | NewUserName |
+---------------+---------------+
| 3282384 |2wsUShrwj45h |
| 2293848 |38Ssjdjr423s |
| 2047765 |2OSIv0s4i348 |
+---------------+---------------+
Worksheet 2: llo_studentsdemo
The myNewID (B) column in this worksheet needs to be updated when id matches UserName from the other worksheet. There are 133000 records in this worksheet. I need to do this for all records in this worksheet. Also, there are several records with matching id values in this worksheet.
Code:
+---------------+---------------+---...
| A | B | C
+---------------+---------------+---...
| id | myNewID | nextColumn
+---------------+---------------+---...
| 3282384 | (value is 2wsUShrwj45h after query runs)
| 2293848 | (value is 38Ssjdjr423s after query runs)
| 2047765 | (value is 2OSIv0s4i348 after query runs)
+---------------+---------------+---...
Here is what I want to do:

if ecEveryoneElse.UserName = llo_studentsdemo.id
set llo_studentsdemo.myNewID = ecEveryoneElse.NewUserName
end

Any help writing this formula would be very much appreciated.

Thank you.

Mike

-------------------------------------------------------------------------

Dear Mike, Good Morning.

You can use the VLOOKUP FUNCTION.
It was specially designed for kind of search.

The use of ISERROR FUNCTION is proper to prevent message error in case the searched id were not found.

Using your example as a reference DO:

Worksheet 2: llo_studentsdemo

A2 -- =IF(ISERROR(VLOOKUP(A2,ecEveryoneElse!A:B,2,FALSE) ),"--- ID NOT FOUND ---",VLOOKUP(A2,ecEveryoneElse!A:B,2,FALSE))

Copy this formula until the last filled line of records

Tell me if it worked for you.

Feel free to ask anything about it.

Dear Mazzaropi,

This worked! Thank you so much for your help.

Mike

-------------------------------------------------------------------------

Dear Mike,

You´re welcome.

I feel happy helping you in your needs.