问题
I have following sample data, I want to get min and max time of every consecutive status.
cat subcat status logtime
fruits apple 0 30-10-2017 06:00
fruits apple 0 30-10-2017 06:03
fruits apple 0 30-10-2017 06:06
fruits apple 0 30-10-2017 06:09
fruits apple 0 30-10-2017 06:12
fruits apple 0 30-10-2017 06:15
fruits apple 0 30-10-2017 06:18
fruits apple 0 30-10-2017 06:21
fruits apple 0 30-10-2017 06:24
fruits apple 0 30-10-2017 06:27
fruits apple 0 30-10-2017 06:30
fruits apple 0 30-10-2017 06:33
fruits apple 0 30-10-2017 06:36
fruits apple 0 30-10-2017 06:39
fruits apple 0 30-10-2017 06:42
fruits apple 0 30-10-2017 06:45
fruits apple 0 30-10-2017 06:48
fruits apple 0 30-10-2017 06:51
fruits apple 0 30-10-2017 06:54
fruits apple 0 30-10-2017 06:57
fruits strawberry 1 30-10-2017 06:00
fruits strawberry 1 30-10-2017 06:03
fruits strawberry 1 30-10-2017 06:06
fruits strawberry 2 30-10-2017 06:09
fruits strawberry 1 30-10-2017 06:12
fruits strawberry 1 30-10-2017 06:15
fruits strawberry 1 30-10-2017 06:18
fruits strawberry 1 30-10-2017 06:21
fruits strawberry 1 30-10-2017 06:24
fruits strawberry 1 30-10-2017 06:27
fruits strawberry 1 30-10-2017 06:30
fruits strawberry 1 30-10-2017 06:33
fruits strawberry 1 30-10-2017 06:36
fruits strawberry 1 30-10-2017 06:39
fruits strawberry 2 30-10-2017 06:42
fruits strawberry 1 30-10-2017 06:45
fruits strawberry 1 30-10-2017 06:48
fruits strawberry 1 30-10-2017 06:51
fruits strawberry 1 30-10-2017 06:54
fruits strawberry 1 30-10-2017 06:57
fruits blueberry 0 30-10-2017 06:00
fruits blueberry 0 30-10-2017 06:03
fruits blueberry 0 30-10-2017 06:06
fruits blueberry 2 30-10-2017 06:09
fruits blueberry 0 30-10-2017 06:12
fruits blueberry 0 30-10-2017 06:15
fruits blueberry 0 30-10-2017 06:18
fruits blueberry 0 30-10-2017 06:21
fruits blueberry 0 30-10-2017 06:24
fruits blueberry 0 30-10-2017 06:27
fruits blueberry 0 30-10-2017 06:30
fruits blueberry 0 30-10-2017 06:33
fruits blueberry 0 30-10-2017 06:36
fruits blueberry 0 30-10-2017 06:39
fruits blueberry 2 30-10-2017 06:42
fruits blueberry 0 30-10-2017 06:45
fruits blueberry 0 30-10-2017 06:48
fruits blueberry 0 30-10-2017 06:51
fruits blueberry 0 30-10-2017 06:54
fruits blueberry 0 30-10-2017 06:57
fruits guaua 1 30-10-2017 06:00
fruits guaua 1 30-10-2017 06:03
fruits guaua 1 30-10-2017 06:06
fruits guaua 2 30-10-2017 06:09
fruits guaua 1 30-10-2017 06:12
fruits guaua 1 30-10-2017 06:15
fruits guaua 1 30-10-2017 06:18
fruits guaua 1 30-10-2017 06:21
fruits guaua 1 30-10-2017 06:24
fruits guaua 1 30-10-2017 06:27
fruits guaua 1 30-10-2017 06:30
fruits guaua 1 30-10-2017 06:33
fruits guaua 1 30-10-2017 06:36
fruits guaua 1 30-10-2017 06:39
fruits guaua 2 30-10-2017 06:42
fruits guaua 1 30-10-2017 06:45
fruits guaua 1 30-10-2017 06:48
fruits guaua 1 30-10-2017 06:51
fruits guaua 1 30-10-2017 06:54
fruits guaua 1 30-10-2017 06:57
I'm trying get min, max time of each status for cat and subcat status.
Output result should be following:
cat subcat status mintime maxtime
fruits apple 0 30-10-2017 06:00 30-10-2017 06:57
fruits strawberry 1 30-10-2017 06:00 30-10-2017 06:06
fruits strawberry 2 30-10-2017 06:09 30-10-2017 06:09
fruits strawberry 1 30-10-2017 06:12 30-10-2017 06:39
fruits strawberry 2 30-10-2017 06:42 30-10-2017 06:42
fruits strawberry 1 30-10-2017 06:45 30-10-2017 06:57
fruits blueberry 0 30-10-2017 06:00 30-10-2017 06:06
fruits blueberry 2 30-10-2017 06:09 30-10-2017 06:09
fruits blueberry 0 30-10-2017 06:12 30-10-2017 06:39
fruits blueberry 2 30-10-2017 06:42 30-10-2017 06:42
fruits blueberry 0 30-10-2017 06:45 30-10-2017 06:57
fruits guaua 1 30-10-2017 06:00 30-10-2017 06:06
fruits guaua 2 30-10-2017 06:09 30-10-2017 06:09
fruits guaua 1 30-10-2017 06:12 30-10-2017 06:39
fruits guaua 2 30-10-2017 06:42 30-10-2017 06:42
fruits guaua 1 30-10-2017 06:45 30-10-2017 06:57
tried with following sql query but unable to get above output instead its giving min, max total hour.
SELECT cat,
subcat,
status,
min(logtime) as minlog,
max(logtime) as maxlog
FROM fruits_log
WHERE
cat = 'fruits'
AND date_format(logtime,'%Y-%m-%d %H) = '2017-10-30 06'
AND status IN ('0','1','2')
GROUP BY cat,subcat,date_format(logtime,'%Y-%m-%d %H),status
ORDER BY cat,subcat,minlog ;
Please help what i'm missing in above query
回答1:
You may try something like this
select t.cat, t.subcat, t.status, min(t.logdate), max(t.logdate)
from
(
select t1.cat, t1.subcat, t1.status, t1.logdate, count(t2.cat) grpnum
from data t1
left join data t2 on t1.cat = t2.cat and t1.subcat = t2.subcat and
t1.status != t2.status and
t1.logdate < t2.logdate
group by t1.cat, t1.subcat, t1.status, t1.logdate
) t
group by t.cat, t.subcat, t.status, t.grpnum
I have tested on just very small sample of your data, but it seems to be ok. The inner query use a self-join to isolate consecutive rows with the same cat, subcat and status values. Once this is ready, you can simply do a group by for each group of rows in the data.
回答2:
Select cat,subcat,minlog,maxlog from ( SELECT cat,
subcat,
status,
min(logtime) as minlog,
max(logtime) as maxlog
FROM fruits_log
WHERE
cat = 'fruits'
AND date_format(logtime,'%Y-%m-%d %H') = '2017-10-30 06'
AND status IN ('0','1','2')
GROUP BY cat,subcat,date_format(logtime,"%Y-%m-%d %H-%i"),status) t1 order by cat,subcat,status;
try this...
来源：https://stackoverflow.com/questions/47305734/sql-query-to-get-min-max-rows