Combine query results into a single row and display time span? - sql

Question

First, I apologize for not having a fiddle, but my data set was too large. So I am including a file.
I have a set of queries that combine user data with location data. The location history data is gathered from RF devices and a history for that user is persisted. Going against the supplied SQL file I need to combine the data where a Staff member may enter a room, leave that room, then come back. This example may constitute a visit with a patient. Another example is if a Staff member is logged in a room consecutively. We are only concerned with data where the time stamps are greater than 2 minutes in length. Meaning the RF reader may read a tag if a staff member walks by a room and that location is logged. Here are the intial set of queries:
with
StaffHistory as(
SELECT
LocationHistories.UserProfileId,
UserProfiles.FirstName,
UserProfiles.LastName,
LocationHistories.LocationId,
Locations.LocationName,
LocationHistories.LocationHistoryTimeStamp,
PreviousLocationTime = LAG(LocationHistories.LocationHistoryTimeStamp, 1) OVER
(PARTITION BY LocationHistories.UserProfileId ORDER BY LocationHistories.LocationHistoryTimeStamp),
NextLocationTime = Lead(LocationHistories.LocationHistoryTimeStamp, 1) OVER
(PARTITION BY LocationHistories.UserProfileId ORDER BY LocationHistories.LocationHistoryTimeStamp)
FROM
LocationHistories
INNER JOIN UserProfiles ON LocationHistories.UserProfileId = UserProfiles.Id
INNER JOIN Locations ON LocationHistories.LocationId = Locations.Id
where LocationTrackingType = 1),
StaffInRoomTime as(
SELECT
StaffHistory.UserProfileId,
StaffHistory.FirstName,
StaffHistory.LastName,
StaffHistory.LocationId,
StaffHistory.LocationName,
DATEDIFF(SECOND, LocationHistoryTimeStamp, NextLocationTime) as TimeSpentInRoom,
StaffHistory.LocationHistoryTimeStamp,
StaffHistory.PreviousLocationTime,
StaffHistory.NextLocationTime
FROM
StaffHistory
Where DATEDIFF(SECOND, LocationHistoryTimeStamp, NextLocationTime) > 120
)
select * from StaffInRoomTime ORDER BY UserProfileId, LocationHistoryTimeStamp
I used common table expressions just for this example. These are actual views in the DB.
The first query joins the histories with the staff. We also create a couple columns for the Previous logged time and the Next logged time. This is so we can determine the length of time in a room.
The second query pulls from the first query and we set a column for how long the staff member was in that location during that time and we also filter any data out where the LocationHistoryTimeStamp and NextLocationTime are greater than 2 minutes.
What I am trying to achieve is combine the data where a staff member may be logged for a room consecutively or if they leave the room and come back.
Here is an example of the data set where the Staff member is in a room consecutively for:
Here would be the outcome:
Here is an example of spanning multiple rooms for a given visit:
I have tried using a Inner Join on the second query that uses the Min(LocationHistoryTimeStamp). However, the time spans ended up not being correct so I am missing something.
This was the Inner Join query I tried:
Select
StaffHistory.LocationId,
StaffHistory.LocationName,
StaffHistory.UserProfileId,
Min(LocationHistoryTimeStamp) as LocationHistoryTimeStamp,
DATEDIFF(SECOND, Min(LocationHistoryTimeStamp), Lead(Min(LocationHistoryTimeStamp), 1) OVER
(PARTITION BY UserProfileId ORDER BY Min(LocationHistoryTimeStamp))) As TimeSpentInRoom,
NextLocationTime = Lead(Min(LocationHistoryTimeStamp), 1) OVER
(PARTITION BY UserProfileId ORDER BY Min(LocationHistoryTimeStamp))
FROM
StaffHistory
Where TimeSpentInRoom > 120
GROUP BY LocationId,LocationName,UserProfileId

Answer 1

Here is statement:
WITH StaffHistory
AS ( SELECT LocationHistories.UserProfileId ,
UserProfiles.FirstName ,
UserProfiles.LastName ,
LocationHistories.LocationId ,
Locations.LocationName ,
LocationHistories.LocationHistoryTimeStamp ,
PreviousLocationTime = LAG(LocationHistories.LocationHistoryTimeStamp,
1) OVER ( PARTITION BY LocationHistories.UserProfileId ORDER BY LocationHistories.LocationHistoryTimeStamp ) ,
NextLocationTime = LEAD(LocationHistories.LocationHistoryTimeStamp,
1) OVER ( PARTITION BY LocationHistories.UserProfileId ORDER BY LocationHistories.LocationHistoryTimeStamp )
FROM LocationHistories
INNER JOIN UserProfiles ON LocationHistories.UserProfileId = UserProfiles.Id
INNER JOIN Locations ON LocationHistories.LocationId = Locations.Id
WHERE LocationTrackingType = 1
),
StaffInRoomTime
AS ( SELECT StaffHistory.UserProfileId ,
StaffHistory.FirstName ,
StaffHistory.LastName ,
StaffHistory.LocationId ,
StaffHistory.LocationName ,
DATEDIFF(SECOND, LocationHistoryTimeStamp,
NextLocationTime) AS TimeSpentInRoom ,
StaffHistory.LocationHistoryTimeStamp ,
StaffHistory.PreviousLocationTime ,
StaffHistory.NextLocationTime
FROM StaffHistory
WHERE DATEDIFF(SECOND, LocationHistoryTimeStamp,
NextLocationTime) > 120
),
prepareIsland
AS ( SELECT * ,
CASE WHEN LAG(LocationId) OVER ( PARTITION BY UserProfileId ORDER BY LocationHistoryTimeStamp ) <> LocationId
THEN 1
ELSE 0
END AS prepIsland
FROM StaffInRoomTime
),
islands
AS ( SELECT * ,
SUM(prepIsland) OVER ( ORDER BY UserProfileId , LocationHistoryTimeStamp ) AS Island
FROM prepareIsland
)
SELECT island ,
UserProfileId ,
FirstName ,
LastName ,
LocationId ,
LocationName ,
SUM(TimeSpentInRoom) TimeSpentInRoom ,
MIN(LocationHistoryTimeStamp) LocationHistoryTimeStamp ,
MIN(PreviousLocationTime) PreviousLocationTime ,
MAX(NextLocationTime) NextLocationTime
FROM islands
GROUP BY island ,
UserProfileId ,
FirstName ,
LastName ,
LocationId ,
LocationName
ORDER BY UserProfileId ,
LocationHistoryTimeStamp