Optimize SQL that uses between clause

Question

Consider the following 2 tables:

Table A:
id
event_time

Table B
id
start_time
end_time

Every record in table A is mapped to exactly 1 reco

Answer 1

The only way out you have to speed up the execution of this query is by making use of indexes.

Take care to put into an index your A.event_time and then put into another index B.start_time and B.end_time.

If as you said this is the only one condition which binds the two entities together, I think this is the only solution you can take.

Fede