Dynamic date table from UNION and with relationships not working

[Feilin]

I have a dynamic date table, which uses the date from two tables, by using:

DISTINCT(
    UNION(
        DISTINCT(
            Table1[Date].[Date]);
        DISTINCT(
            Table2[Date].[Date])))

Then I do some calculations (bring out the years/months/quarters/days/etc). Now, when I try to connect this table to either of the original two (by dragging it in the relationships tab), it goes blank because the original field doesn't retrieve any data (i.e. has no rows in it, it would seem). How do I get around this?

Also, it may not be the best idea to use the formula above to create the date table, so feel free to suggest/link better solutions (although that is not the critical issue, unless it is part of the problem, of course).

[Anonymous]

Just used with Unique Identifiers from 2 tables that refresh weekly.
Replaced date fields in code with the Unique Identifier column.

DISTINCT(
    UNION(
        DISTINCT(
            Table1[UniqueIdentifier]);
        DISTINCT(
            Table2[UniqueIdentifier])))

Worked like a charm!
Thanks 🙂

[Greg_Deckler · Accepted solution]

You could get around it by using ALL but I would just use CALENDARAUTO.

[Feilin]

Yeah, that seems to do the trick; thanks!