SQL - Ugly combination of GROUP BY and COALESCE

Question

I have a table with data similar to the following:

[ID], [State], [foo], [DateCreated], [DateUpdated]

The longer I work on this, the uglier my SQL is getti

Answer 1

Try this:

select state_name,foo,max(dateUpdated) from state where state_name in (select state_name from state group by state_name having count(distinct foo)=1) group by state_name,foo;