Select all rows that have at least a list of features

Question

I have EXPERIMENTAL_RUNS (runId), each of which have any number of SENSORS (sensorId) associated with them. With that in mind, I have an RS table to join the two:

Answer 1

Assuming runId, sensorId are unique in the rs table, this will find the runIds that have all 3 sensorIds:

SELECT runId, COUNT(c) ct
FROM rs
WHERE sensorId IN (11, 13, 15)
GROUP BY runId
HAVING ct = 3