Spark SQL nested query


Spark SQL nested query



I have the following spark sql query


SELECT count(*),
channel
FROM channelusage a
WHERE a.starttime>= windowstarttime
AND a.endtime <= windowendtime
GROUP BY channel



I have to generate these counts for 10 windows. Currently I use a while loop to generate the windowstarttime and windowendtime.



What I want to do is - I want to generate the windows in the sql query itself something like a nested sql similar to this -


SELECT count(*),
channel
FROM channelusage a
WHERE (nested query logic)
GROUP BY channel



so that I get a output similar to this


windowstarttime | windowentime | channel | count
11:00:01 | 11:00:10 | ABC |2
11:00:11 | 11:00:20 | ABC |4
11:00:21 | 11:00:30 | NBC |10
11:00:31 | 11:00:40 | CNN |5





What is your input data set?
– Kannan Kandasamy
Jun 29 at 20:24





input is required here
– thebluephantom
yesterday









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