SQL Group By within some time frame
I need to group by id, status within some timestamp.
for example I have this table:
id | status | time | value | deviceId
1 | true | 10:31 | 1 | 5
2 | true | 10:32 | 2 | 5
3 | true | 10:33 | 3 | 5
4 | false | 10:34 | 3 | 5
5 | false | 10:35 | 4 | 5
6 | false | 10:36 | 5 | 5
7 | true | 10:37 | 4 | 5
8 | true | 10:38 | 5 | 5
9 | true | 10:39 | 6 | 5
Table is ordered by time.
Every group should be for same id, if status is true, within time were status is true.
For same groupId I will need new results when status become true, but this is in another time frame so should be another group.
Based on above example result should be:
deviceId | avg(value)
5 | 2 (average value for rows 1,2,3 for deviceid = 5)
5 | 5 (average value of rows 7,8,9 for deviceid = 5. Same group, but another time frame)
I can group by deviceId and group by status.
SELECT deviceid ,status, AVG(value)
FROM mytable
WHERE status = true
GROUP BY deviceid,status;
But I don't know how to do all that within time frame?
Thank you for your help.
Edit:
I tried to explain what is time frame. Maybe my English is not good enough so I will try again. You can see that time is in order. Table is ordered by time.
Rows 1,2,3 are within time frame while status i true.
In row 4 status is false so this is time when second time frame starts.
Second time frame are rows 4,5,6.
In row 7 status is again true, so here third time frame starts. Third time frame are rows 7,8,9
I just need results of groups where status is true, so only first and third time frame are relevant to me.
sql
edited Nov 13 '18 at 11:57
Gordon Linoff
769k35300402
asked Nov 13 '18 at 10:36
RaskolnikovRaskolnikov
77121953
|
show 7 more comments
I need to group by id, status within some timestamp.
for example I have this table:
id | status | time | value | deviceId
1 | true | 10:31 | 1 | 5
2 | true | 10:32 | 2 | 5
3 | true | 10:33 | 3 | 5
4 | false | 10:34 | 3 | 5
5 | false | 10:35 | 4 | 5
6 | false | 10:36 | 5 | 5
7 | true | 10:37 | 4 | 5
8 | true | 10:38 | 5 | 5
9 | true | 10:39 | 6 | 5
Table is ordered by time.
Every group should be for same id, if status is true, within time were status is true.
For same groupId I will need new results when status become true, but this is in another time frame so should be another group.
Based on above example result should be:
deviceId | avg(value)
5 | 2 (average value for rows 1,2,3 for deviceid = 5)
5 | 5 (average value of rows 7,8,9 for deviceid = 5. Same group, but another time frame)
I can group by deviceId and group by status.
SELECT deviceid ,status, AVG(value)
FROM mytable
WHERE status = true
GROUP BY deviceid,status;
But I don't know how to do all that within time frame?
Thank you for your help.
Edit:
I tried to explain what is time frame. Maybe my English is not good enough so I will try again. You can see that time is in order. Table is ordered by time.
Rows 1,2,3 are within time frame while status i true.
In row 4 status is false so this is time when second time frame starts.
Second time frame are rows 4,5,6.
In row 7 status is again true, so here third time frame starts. Third time frame are rows 7,8,9
I just need results of groups where status is true, so only first and third time frame are relevant to me.
sql
edited Nov 13 '18 at 11:57
Gordon Linoff
769k35300402
asked Nov 13 '18 at 10:36
RaskolnikovRaskolnikov
77121953
2
1,2,3 and 7,8,9 are rows, not columns. Also, please define what a timeframe is to you. I just see a bunch of different times, and I don't see how some of them belong together and others don't.
– GolezTrol
Nov 13 '18 at 10:37
What is the type of the time column?
– majidarif
Nov 13 '18 at 10:38
@majidarif Timestamp
– Raskolnikov
Nov 13 '18 at 10:40
Time cannot be hardcoded. It should work for any time frame. I could have 1000 time frames.
– Raskolnikov
Nov 13 '18 at 10:49
SQL is just a language, what rdbms are you working with? Please edit your question to include the rdbms product tag as well as the specific version tag.
– Zohar Peled
Nov 13 '18 at 10:49
|
show 7 more comments
I need to group by id, status within some timestamp.
for example I have this table:
id | status | time | value | deviceId
1 | true | 10:31 | 1 | 5
2 | true | 10:32 | 2 | 5
3 | true | 10:33 | 3 | 5
4 | false | 10:34 | 3 | 5
5 | false | 10:35 | 4 | 5
6 | false | 10:36 | 5 | 5
7 | true | 10:37 | 4 | 5
8 | true | 10:38 | 5 | 5
9 | true | 10:39 | 6 | 5
Table is ordered by time.
Every group should be for same id, if status is true, within time were status is true.
For same groupId I will need new results when status become true, but this is in another time frame so should be another group.
Based on above example result should be:
deviceId | avg(value)
5 | 2 (average value for rows 1,2,3 for deviceid = 5)
5 | 5 (average value of rows 7,8,9 for deviceid = 5. Same group, but another time frame)
I can group by deviceId and group by status.
SELECT deviceid ,status, AVG(value)
FROM mytable
WHERE status = true
GROUP BY deviceid,status;
But I don't know how to do all that within time frame?
Thank you for your help.
Edit:
I tried to explain what is time frame. Maybe my English is not good enough so I will try again. You can see that time is in order. Table is ordered by time.
Rows 1,2,3 are within time frame while status i true.
In row 4 status is false so this is time when second time frame starts.
Second time frame are rows 4,5,6.
In row 7 status is again true, so here third time frame starts. Third time frame are rows 7,8,9
I just need results of groups where status is true, so only first and third time frame are relevant to me.
sql
edited Nov 13 '18 at 11:57
Gordon Linoff
769k35300402
asked Nov 13 '18 at 10:36
RaskolnikovRaskolnikov
77121953
I need to group by id, status within some timestamp.
for example I have this table:
id | status | time | value | deviceId
1 | true | 10:31 | 1 | 5
2 | true | 10:32 | 2 | 5
3 | true | 10:33 | 3 | 5
4 | false | 10:34 | 3 | 5
5 | false | 10:35 | 4 | 5
6 | false | 10:36 | 5 | 5
7 | true | 10:37 | 4 | 5
8 | true | 10:38 | 5 | 5
9 | true | 10:39 | 6 | 5
Table is ordered by time.
Every group should be for same id, if status is true, within time were status is true.
For same groupId I will need new results when status become true, but this is in another time frame so should be another group.
Based on above example result should be:
deviceId | avg(value)
5 | 2 (average value for rows 1,2,3 for deviceid = 5)
5 | 5 (average value of rows 7,8,9 for deviceid = 5. Same group, but another time frame)
I can group by deviceId and group by status.
SELECT deviceid ,status, AVG(value)
FROM mytable
WHERE status = true
GROUP BY deviceid,status;
But I don't know how to do all that within time frame?
Thank you for your help.
Edit:
I tried to explain what is time frame. Maybe my English is not good enough so I will try again. You can see that time is in order. Table is ordered by time.
Rows 1,2,3 are within time frame while status i true.
In row 4 status is false so this is time when second time frame starts.
Second time frame are rows 4,5,6.
In row 7 status is again true, so here third time frame starts. Third time frame are rows 7,8,9
I just need results of groups where status is true, so only first and third time frame are relevant to me.
sql
sql
edited Nov 13 '18 at 11:57
Gordon Linoff
769k35300402
asked Nov 13 '18 at 10:36
RaskolnikovRaskolnikov
77121953
edited Nov 13 '18 at 11:57
Gordon Linoff
769k35300402
asked Nov 13 '18 at 10:36
RaskolnikovRaskolnikov
77121953
edited Nov 13 '18 at 11:57
Gordon Linoff
769k35300402
edited Nov 13 '18 at 11:57
Gordon Linoff
769k35300402
edited Nov 13 '18 at 11:57
Gordon Linoff
769k35300402
769k35300402
asked Nov 13 '18 at 10:36
RaskolnikovRaskolnikov
77121953
asked Nov 13 '18 at 10:36
RaskolnikovRaskolnikov
77121953
asked Nov 13 '18 at 10:36
RaskolnikovRaskolnikov
77121953
77121953
2
1,2,3 and 7,8,9 are rows, not columns. Also, please define what a timeframe is to you. I just see a bunch of different times, and I don't see how some of them belong together and others don't.
– GolezTrol
Nov 13 '18 at 10:37
What is the type of the time column?
– majidarif
Nov 13 '18 at 10:38
@majidarif Timestamp
– Raskolnikov
Nov 13 '18 at 10:40
Time cannot be hardcoded. It should work for any time frame. I could have 1000 time frames.
– Raskolnikov
Nov 13 '18 at 10:49
SQL is just a language, what rdbms are you working with? Please edit your question to include the rdbms product tag as well as the specific version tag.
– Zohar Peled
Nov 13 '18 at 10:49
|
show 7 more comments
2
1,2,3 and 7,8,9 are rows, not columns. Also, please define what a timeframe is to you. I just see a bunch of different times, and I don't see how some of them belong together and others don't.
– GolezTrol
Nov 13 '18 at 10:37
What is the type of the time column?
– majidarif
Nov 13 '18 at 10:38
@majidarif Timestamp
– Raskolnikov
Nov 13 '18 at 10:40
Time cannot be hardcoded. It should work for any time frame. I could have 1000 time frames.
– Raskolnikov
Nov 13 '18 at 10:49
SQL is just a language, what rdbms are you working with? Please edit your question to include the rdbms product tag as well as the specific version tag.
– Zohar Peled
Nov 13 '18 at 10:49
2
2
1,2,3 and 7,8,9 are rows, not columns. Also, please define what a timeframe is to you. I just see a bunch of different times, and I don't see how some of them belong together and others don't.
– GolezTrol
Nov 13 '18 at 10:37
1,2,3 and 7,8,9 are rows, not columns. Also, please define what a timeframe is to you. I just see a bunch of different times, and I don't see how some of them belong together and others don't.
– GolezTrol
Nov 13 '18 at 10:37
What is the type of the time column?
– majidarif
Nov 13 '18 at 10:38
What is the type of the time column?
– majidarif
Nov 13 '18 at 10:38
@majidarif Timestamp
– Raskolnikov
Nov 13 '18 at 10:40
@majidarif Timestamp
– Raskolnikov
Nov 13 '18 at 10:40
Time cannot be hardcoded. It should work for any time frame. I could have 1000 time frames.
– Raskolnikov
Nov 13 '18 at 10:49
Time cannot be hardcoded. It should work for any time frame. I could have 1000 time frames.
– Raskolnikov
Nov 13 '18 at 10:49
SQL is just a language, what rdbms are you working with? Please edit your question to include the rdbms product tag as well as the specific version tag.
– Zohar Peled
Nov 13 '18 at 10:49
SQL is just a language, what rdbms are you working with? Please edit your question to include the rdbms product tag as well as the specific version tag.
– Zohar Peled
Nov 13 '18 at 10:49
|
show 7 more comments
1 Answer
1
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oldest
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You can determine the groups of "true"s by doing a cumulative count of "false"s. This count will be constant for a group of consecutive "true"s.
The rest is then just filtering and aggregation:
select deviceid, grp, avg(value)
from (select t.*,
sum(case when status = 'false' then 1 else 0 end) over (partition by deviceid order by time) as grp
from t
) t
where status = 'true'
group by deviceid, grp;
answered Nov 13 '18 at 12:04
Gordon LinoffGordon Linoff
769k35300402
add a comment |
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1 Answer
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You can determine the groups of "true"s by doing a cumulative count of "false"s. This count will be constant for a group of consecutive "true"s.
The rest is then just filtering and aggregation:
select deviceid, grp, avg(value)
from (select t.*,
sum(case when status = 'false' then 1 else 0 end) over (partition by deviceid order by time) as grp
from t
) t
where status = 'true'
group by deviceid, grp;
answered Nov 13 '18 at 12:04
Gordon LinoffGordon Linoff
769k35300402
add a comment |
You can determine the groups of "true"s by doing a cumulative count of "false"s. This count will be constant for a group of consecutive "true"s.
The rest is then just filtering and aggregation:
select deviceid, grp, avg(value)
from (select t.*,
sum(case when status = 'false' then 1 else 0 end) over (partition by deviceid order by time) as grp
from t
) t
where status = 'true'
group by deviceid, grp;
answered Nov 13 '18 at 12:04
Gordon LinoffGordon Linoff
769k35300402
add a comment |
You can determine the groups of "true"s by doing a cumulative count of "false"s. This count will be constant for a group of consecutive "true"s.
The rest is then just filtering and aggregation:
select deviceid, grp, avg(value)
from (select t.*,
sum(case when status = 'false' then 1 else 0 end) over (partition by deviceid order by time) as grp
from t
) t
where status = 'true'
group by deviceid, grp;
answered Nov 13 '18 at 12:04
Gordon LinoffGordon Linoff
769k35300402
You can determine the groups of "true"s by doing a cumulative count of "false"s. This count will be constant for a group of consecutive "true"s.
The rest is then just filtering and aggregation:
select deviceid, grp, avg(value)
from (select t.*,
sum(case when status = 'false' then 1 else 0 end) over (partition by deviceid order by time) as grp
from t
) t
where status = 'true'
group by deviceid, grp;
answered Nov 13 '18 at 12:04
Gordon LinoffGordon Linoff
769k35300402
answered Nov 13 '18 at 12:04
Gordon LinoffGordon Linoff
769k35300402
answered Nov 13 '18 at 12:04
Gordon LinoffGordon Linoff
769k35300402
answered Nov 13 '18 at 12:04
Gordon LinoffGordon Linoff
769k35300402
769k35300402
add a comment |
add a comment |
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2
1,2,3 and 7,8,9 are rows, not columns. Also, please define what a timeframe is to you. I just see a bunch of different times, and I don't see how some of them belong together and others don't.
– GolezTrol
Nov 13 '18 at 10:37
What is the type of the time column?
– majidarif
Nov 13 '18 at 10:38
@majidarif Timestamp
– Raskolnikov
Nov 13 '18 at 10:40
Time cannot be hardcoded. It should work for any time frame. I could have 1000 time frames.
– Raskolnikov
Nov 13 '18 at 10:49
SQL is just a language, what rdbms are you working with? Please edit your question to include the rdbms product tag as well as the specific version tag.
– Zohar Peled
Nov 13 '18 at 10:49