SQL Server: Replicate data from multiple tables into one - sql

Question

Is it possible to replicate data from multiple tables into one real time?
For example I have 3 tables:
Table: DriverLocation
Columns: DriverId, Latitude, Longtide, GpsLastUpdate, Speed, ...
Table: Driver
Columns: DriverId, FirstName, LastName, Address, IsActive, ...
Table: Job
Columns: JobId, DriverId, JobName, Pickup, Delivery, ...
I'd like to create a join query between these 3 tables and in real time publish that data into a table called RealTimeDriverInfo.
Example (pseudo code):
Driver(FirstName, LastName)
JOIN DriverLocatoin(Latitude, Longitude)
JOIN Job(JobName)
PUT RESULT IN REAL TIME INTO => RealTimeDriverInfo table
Is that possible?
EDIT: NOTE:
The reason I want the data to be in a table is because I would like to use this c# library to get real time notifications from a table, this libarary only works with tables and unfortunately you cannot join multiple tables only monitor one table, the library is SQLTableDependency
.NET Library to monitor chagnes in a SQL Table (it can only work with tables, NOT views and you can only monitor one table you cannot join multiple tables)
https://github.com/christiandelbianco/monitor-table-change-with-sqltabledependency
This is why I somehow need to join multiple tables into one table

Answer 1

First, a simple view may do what you want:
CREATE v_RealTimeDriverInfo
SELECT D.FirstName, D.LastName, DL.Latitude, DL.Longitude, J.JobName
FROM Driver D JOIN
DriverLocation DL
ON D.DriverID = DL.DriverID JOIN
Job J
ON J.DriverID = D.DriverID;
with indexes on the columns used for JOINing, this would usually be fast enough when querying. This is the "standard" way to do what you want.
If you actually want a separate "virtual" table that is always up-to-date, then you want something akin to a materialized view, which SQL Server supports as indexed views. The idea is that the index is maintained "real-time" as the underlying data changes.
For your example, it would look like:
CREATE v_RealTimeDriverInfo
SELECT D.FirstName, D.LastName, DL.Latitude, DL.Longitude, J.JobName
FROM Driver D JOIN
DriverLocation DL
ON D.DriverID = DL.DriverID JOIN
Job J
ON J.DriverID = D.DriverID;
CREATE UNIQUE CLUSTERED INDEX v_RealTimeDriverInfo_pk ON (D.FirstName, D.LastName, DL.Latitude, DL.Longitude, J.JobName);

Answer 2

Is inserting into a different table necessary? A view would suffice in this instance. I am assuming that JobId is an integer that increments by one with each job. I use CROSS APPLY to pull in the most recent location and job. You'll also have to have some logic to determine whether or not the driver is on an active job.
select a.FirstName FirstName
,a.LastName LastName
,b.Latitude Latitude
,b.Longitude Longitude
,c.JobName JobName
from Driver a
cross apply (
select top 1
*
from DriverLocation b
where b.DriverId = a.DriverId
order by b.GpsLastUpdate desc
) b
cross apply (
select top 1
c.*
from Job c
where c.DriverId = a.DriverId
order by c.JobId desc
) c

Answer 3

Sure you can, just a quick couple of JOINS. But it seems that creating a view would probably serve you a little better.
INSERT INTO RealTimeDriverInfo (FirstName,LastName,Latitude,Longitude,JobName)
SELECT D.FirstName, D.LastName,DL.Latitude, DL.Longitude,J.JobName
FROM Driver D
INNER JOIN DriverLocation DL on D.DriverID = DL.DriverID
INNER JOIN Job J on J.DriverID = D.DriverID