How to write the sql statement

Question

3.50/5 (2 votes)

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Hi,

the SQL,

SQL

SELECT DATE,VRS_DEVICEID,LOCATION FROM 
(
SELECT  VRS_DEVICEID,'('+VRS_LATITUDE+', '+VRS_LONGITUDE+')' AS LOCATION,
SUBSTRING(CONVERT(VARCHAR(23), VRS_UTCTIME, 121),1,16) AS DATE
FROM STS_VEHICLE_RUNNING_STATUS )AS T1

GROUP BY DATE,
VRS_DEVICEID,LOCATION ORDER BY DATE ASC

retrieve data as below

SQL

     DATE          VRS_DEVICEID    LOCATION
     ----          ------------    --------

2012-07-02 10:59       ST001        TVM
2012-07-02 10:59       ST001        EKM
2012-07-02 10:59       ST001        ATTIGAL

2012-07-02 11:00       ST001        KOTTAKKAL
2012-07-02 11:00       ST001        KARAMANA

2012-07-02 11:02       ST001        MANNARKKAD
2012-07-02 11:02       ST001        PALAKKAD

But i want to retrieve it as below

SQL

  DATE          VRS_DEVICEID    LOCATION
     ----          ------------    --------

2012-07-02 10:59       ST001        TVM

2012-07-02 11:00       ST001        KOTTAKKAL

2012-07-02 11:02       ST001        MANNARKKAD

That is, the top row of each DATE.

Thanks..

Posted 21-Nov-12 23:37pm

hasbina

Updated 21-Nov-12 23:39pm

__TR__

v2

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Herman<T>.Instance 22-Nov-12 6:07am

how can you have the same ST001 ID at 3 different locations?

1 solution

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Herman<T>.Instance · Accepted Answer · 2012-11-21T23:52:00

Solution 1

SQL

SELECT DATE,VRS_DEVICEID,LOCATION FROM
(
    SELECT Row_number() over (
        PARTITION BY SUBSTRING(CONVERT(VARCHAR(23), VRS_UTCTIME, 121),1,16) order by VRS_DEVICEID,'('+VRS_LATITUDE+', '+VRS_LONGITUDE+')' ) as rowno,
        VRS_DEVICEID,'('+VRS_LATITUDE+', '+VRS_LONGITUDE+')' AS LOCATION,
    SUBSTRING(CONVERT(VARCHAR(23), VRS_UTCTIME, 121),1,16) AS DATE
    FROM STS_VEHICLE_RUNNING_STATUS
)AS T1
where rowno = 1
ORDER BY DATE ASC

Posted 21-Nov-12 23:52pm

Herman<T>.Instance

Updated 22-Nov-12 22:42pm

v5

Comments

hasbina 22-Nov-12 5:55am

@digimanus,
the SQL executed with error
Incorrect syntax near 'partion'.

Herman<T>.Instance 22-Nov-12 5:59am

sorry you are right it is the word partition

hasbina 22-Nov-12 5:59am

k.executed successfully.correction PARTITION BY.

But not get the desired result.

why?

Thanks..

Herman<T>.Instance 22-Nov-12 5:59am

which result do you get?

Herman<T>.Instance 22-Nov-12 6:01am

changed again. replaced the lat/lon combination with VRS_DEVICEID, cause that is what you are requesting in the main select, not the global position

hasbina 22-Nov-12 6:06am

@digimanus,

sir SQL,

SELECT DATE,VRS_DEVICEID,LOCATION FROM
(
SELECT Row_number() over (
PARTITION BY SUBSTRING(CONVERT(VARCHAR(23), VRS_UTCTIME, 121),1,16)
order by VRS_DEVICEID,'('+VRS_LATITUDE+', '+VRS_LONGITUDE+')'
) as rowno,
VRS_DEVICEID,'('+VRS_LATITUDE+', '+VRS_LONGITUDE+')' AS LOCATION,
SUBSTRING(CONVERT(VARCHAR(23), VRS_UTCTIME, 121),1,16) AS DATE
FROM STS_VEHICLE_RUNNING_STATUS
)AS T1
where rowno = 1
ORDER BY DATE ASC

give the desired result.

Thanks.

Herman<T>.Instance 22-Nov-12 6:09am

Great your problem is solved. If you accept my solution as answer this thread gets out of the unanswered list.

hasbina 22-Nov-12 6:18am

sir,

need change at PARTITION BY and ORDER BY in your solution as i write in above comment.

hasbina 22-Nov-12 6:13am

@digimanus

Thank you soo much sir..