Does Sql JOIN order affect performance?

Question

I was just tidying up some sql when I came across this query:

SELECT 
        jm.IMEI ,
        jm.MaxSpeedKM ,
              


        

Answer 1

Usually not. I'm not 100% this applies verbatim to Sql-Server, but in Postgres the query planner reserves the right to reorder the inner joins as it sees fit. The exception is when you reach a threshold beyond which it's too expensive to investigate changing their order.