How does one do a SQL select over multiple partitions?

Question

Is there a more efficient way than:

select * from transactions partition( partition1 ) 
union all 
select * from transactions partition( partition2 ) 
union all          


        

Answer 1

Can you provide additional context? What are your predicates? What makes you think that you need to explicitly tell the optimizer to go against multiple partitions. You may have the wrong partition key in use, for example.