Как я могу изменить этот скрипт для подсчета каждые 3 минуты?

Question

Мне нужно изменить этот запрос, чтобы получить результат для каждого 3-минутного интервала, т. Е. 09:00 - 09:02 и 09:03 - 09: 06

Ниже Query дает счетчик результатов для каждого 1минута:

select TO_CHAR(ECH.CH_VALIDFROM,'mm/dd/yyyy hh24:mi'), count(1) count
from emcdu.ext_contract_history ech
where ch_status='a' and CH_VALIDFROM BETWEEN TO_DATE('21/11/2018 
09:00:00','dd/mm/yyyy hh24:mi:ss') 
AND TO_DATE ('21/11/2018 09:06:00','dd/mm/yyyy hh24:mi:ss')--and 
ECH.CHANNEL='DSP'
and ch_validfrom=(select min(CH_VALIDFROM) from emcdu.ext_contract_history 
where co_id=ech.co_id and ch_status='a')
group by channel, TO_CHAR(ECH.CH_VALIDFROM,'mm/dd/yyyy hh24:mi') ORDER BY 
TO_CHAR(ECH.CH_VALIDFROM,'mm/dd/yyyy hh24:mi') ASC;

Вывод для вышеуказанного запроса:

TO_CHAR(ECH.CH_VALIDFROM,'mm/dd/yyyy hh24:mi')         COUNT
11/21/2018 09:00                                       1
11/21/2018 09:01                                       2
11/21/2018 09:02                                       1
11/21/2018 09:03                                       1
11/21/2018 09:05                                       1

Answer 1

Вы можете попробовать ниже

select trunc(ECH.CH_VALIDFROM, 'mi') -  1/24/60 * mod(extract (minute from cast(ECH.CH_VALIDFROM as timestamp), 3), count(1) count
from emcdu.ext_contract_history ech
where ch_status='a' and CH_VALIDFROM BETWEEN TO_DATE('21/11/2018 
09:00:00','dd/mm/yyyy hh24:mi:ss') 
AND TO_DATE ('21/11/2018 09:06:00','dd/mm/yyyy hh24:mi:ss')--and 
ECH.CHANNEL='DSP'
and ch_validfrom=(select min(CH_VALIDFROM) from emcdu.ext_contract_history 
where co_id=ech.co_id and ch_status='a')
group by channel, trunc(ECH.CH_VALIDFROM, 'mi') -  1/24/60 * mod(extract (minute from cast(ECH.CH_VALIDFROM as timestamp)), 3) 
ORDER BY 
trunc(ECH.CH_VALIDFROM, 'mi') -  1/24/60 * mod(extract (minute from cast(ECH.CH_VALIDFROM as timestamp)), 3) ASC;