How can I get the UNION of 2 different tables

[james-ai]

Hi,

All the examples I could see are for the same table. I've tried messing around to see if I could get the UNION of multiple tables but failed every time. I'm basically wanting to produce a query that looks something like:

SELECT id, updated_at FROM table_1 UNION SELECT id, updated_at FROM table_2 ORDER BY updated_at;

If I try something like this I only get results from table_1:

t1 = Table1.select(:id, :updated_at).where('updated_at > ?', 2.weeks.ago)
t2 = Table2.select(:id, :updated_at).where('updated_at > ?', 2.weeks.ago)
results = Table1.union(t1).union(t2)

[james-ai]

Meant to write this in active_record_extended