I get the same result-set using 2 methods.
One SQL uses sub-queries, the cost is 3.
The other SQL uses joins and the cost is 2.
Does this mean that the query which uses sub-queries will run 33.33% slower than the query which uses joins?
I.e. If it takes 3 minutes for the query with sub-queries to execute, does this mean that the query with
joins will take only 2 minutes, given all other conditions are equal?