Using Look Up and Select To Input An Initial Value

Hi Guys,

I need help setting up a dereference from these two tables. My Challenge is that the category column is already a reference to another table ( Category Types). I created the table Expense Category Database to store Category Types and am trying to match the Description Name (Key) to the Description on the Master Expenses Log.

Table 1: Master Expenses Log

Table 2: Expense Category Database

When [Description Name]=[Description], Reference the [Category ID] From Expense Category Database and set the Initial Value Of [Category] From Master Expenses Log to the [Category ID] .

lookup([_thisrow].[Description],“Expense Category Database”,“Description Name”,“Category ID”)

I attempted this formula to see if if it would work, but its not working.