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SQL Query

Posted on 2014-11-03
8
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Last Modified: 2014-11-10
Hi, Expert
We have gps system each time device sending data every minute , if the vehicle is moving it has speed data if the vehicle is stopped then speed =0
I need to Calculate the total stopped time and location of the vehicle where is stopped and how long.

Please send me if you have any example

Columns as describe below

devicenum      
latitude
longitude
speed      
systime
0
Comment
Question by:Asrar Azmi
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8 Comments
 
LVL 8

Expert Comment

by:Ahmed Merghani
ID: 40418930
Your query will be something like:
select count(*), latitude, longitude from YOUR_TABLE group by latitude, longitude where speed=0

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This will give you the locations of vehicle where is stopped and how long.
regarding the total stop time regardless of where may be as this:
select count(*) from YOUR_TABLE  where speed=0

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Put in mind the result is number of minutes as you said the data sending is every minute.
0
 

Author Comment

by:Asrar Azmi
ID: 40418953
Dear Expert,

Thanks for your quick reply ,
How we can display systime column also with particular location like Stop Duration Like From To date time.

Waiting your reply.
0
 
LVL 24

Expert Comment

by:Phillip Burton
ID: 40418991
How about this:

with T1 as (
select *, sum(case speed when 0 then 0 else 1 end) over(order by systime) as MyGroup
from YOUR_TABLE)
select devicenum, latitude, longitude, min(systime) as MinTime, max(systime) as MaxTime
from T1
group by devicenum, latitude, longitude, MyGroup

Open in new window

0
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LVL 8

Expert Comment

by:Ahmed Merghani
ID: 40419137
select count(*), latitude, longitude from YOUR_TABLE group by latitude, longitude, min(systime) From, max(systime) To where speed=0

Open in new window

0
 

Author Comment

by:Asrar Azmi
ID: 40423361
Dear Ahmed,
Above Query have error can you fix it and send me again.
0
 
LVL 8

Expert Comment

by:Ahmed Merghani
ID: 40423576
Dear asrar  and sorry for the mistake:
select count(*), devicenum, latitude, longitude from YOUR_TABLE group by devicenum, latitude, longitude, min(systime) FromTime, max(systime) ToTime where speed=0

Open in new window

Wish this solve the problem.
0
 

Author Comment

by:Asrar Azmi
ID: 40425796
Thanks dear Ahmed
Can you share your personal e-mail and contact details with me ?
0
 
LVL 8

Accepted Solution

by:
Ahmed Merghani earned 500 total points
ID: 40428665
No problem. I sent you a connection request @ linkedin.
0

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