MYSQL OR vs IN performance

Question

I am wondering if there is any difference in regards to performance between the following

SELECT ... FROM ... WHERE someFIELD IN(1,2,3,4)

SELECT ... FROM ..         


        

Answer 1

From what I understand about the way that the compiler optimizes these types of queries, using the IN clause is more efficient than multiple OR clauses. If you have values where the BETWEEN clause can be used, that is more efficient still.