Should be pretty simple. Since the first table only has one field, I assume
you just want to find records in the second table that match on that single
field. Just bring both tables into your query, with an inner join on the
matching field, and display records from the second table (or both tables,
if you prefer).

The SQL for the query would be something like:

Select Table2.* From Table1 Inner Join Table2 on Table1.Field1 =
Table2.Field1

where "Field1" is the field that contains the same data in both tables.