Use the ConvertSqlTimeColumnToEpochMs function to convert any native
datetime data type or epoch time (millisecond precision).
Additional tests and update of existing due to timezone issues
running MSSQL on UTC and dev environment on non-utc.
Update stored procedures test to handle more parameters.
Update test dashboard.
This seems like a niche feature which can be solved by defining multiple queries. In the future
we'll probably add support for defining series name by alias field similar to how other datasources
have solved that, e.g. prometheus.
