MongoDB - Document Structure to create matrix from multiple value pairs - r

Question

I am new to NoSQL and MongoDB, so please don't bash. I have used SQL databases in the past, but am now looking to leverage the scalability of NoSQL. One application that comes to mind is the collection of experimental results, where they are serialized in some manner with a start date, end date, part number, serial number, etc. Along with each experiment, there are many "measurements" collected, but the list of measurements may be unique in each experiment.
I am looking for ideas in how to structure the document to achieve the follow tasks:
1) Query based on date ranges, part numbers, serial numbers
2) See resulting table in a "spreadsheet" table
3) Perform statistical calculats, perhaps with R, on the different "measurements"
An example might look like:
[
{
"_id": {
"$oid": "5e680d6063cb144f9d1be261"
},
"StartDate": {
"$date": {
"$numberLong": "1583841600000"
}
},
"EndDate": {
"$date": {
"$numberLong": "1583842007000"
}
},
"PartNumber": "1Z45NP7X",
"SerialNumber": "U84A3102",
"Status": "Acceptable",
"Results": [
{
"Sensor": "Pressure",
"Value": "14.68453",
"Units": "PSIA",
"Flag": "1"
},
{
"Sensor": "Temperature",
"Value": {
"$numberDouble": "68.43"
},
"Units": "DegF",
"Flag": {
"$numberInt": "1"
}
},
{
"Sensor": "Velocity",
"Value": {
"$numberDouble": "12.4"
},
"Units": "ft/s",
"Flag": {
"$numberInt": "1"
}
}
]
},
{
"_id": {
"$oid": "5e68114763cb144f9d1be263"
},
"StartDate": {
"$date": {
"$numberLong": "1583842033000"
}
},
"EndDate": {
"$date": {
"$numberLong": "1583842434000"
}
},
"PartNumber": "1Z45NP7X",
"SerialNumber": "U84A3103",
"Status": "Acceptable",
"Results": [
{
"Sensor": "Pressure",
"Value": "14.70153",
"Units": "PSIA",
"Flag": "1"
},
{
"Sensor": "Temperature",
"Value": {
"$numberDouble": "68.55"
},
"Units": "DegF",
"Flag": {
"$numberInt": "1"
}
},
{
"Sensor": "Velocity",
"Value": {
"$numberDouble": "12.7"
},
"Units": "ft/s",
"Flag": {
"$numberInt": "1"
}
}
]
},
{
"_id": {
"$oid": "5e68115f63cb144f9d1be264"
},
"StartDate": {
"$date": {
"$numberLong": "1583842464000"
}
},
"EndDate": {
"$date": {
"$numberLong": "1583842434000"
}
},
"PartNumber": "1Z45NP7X",
"SerialNumber": "U84A3104",
"Status": "Acceptable",
"Results": [
{
"Sensor": "Pressure",
"Value": "14.59243",
"Units": "PSIA",
"Flag": "1"
},
{
"Sensor": "Weight",
"Value": {
"$numberDouble": "67.93"
},
"Units": "lbf",
"Flag": {
"$numberInt": "1"
}
},
{
"Sensor": "Torque",
"Value": {
"$numberDouble": "122.33"
},
"Units": "ft-lbf",
"Flag": {
"$numberInt": "1"
}
}
]
}
]
Another approach might be:
[
{
"_id": {
"$oid": "5e680d6063cb144f9d1be261"
},
"StartDate": {
"$date": {
"$numberLong": "1583841600000"
}
},
"EndDate": {
"$date": {
"$numberLong": "1583842007000"
}
},
"PartNumber": "1Z45NP7X",
"SerialNumber": "U84A3102",
"Status": "Acceptable",
"Pressure (PSIA)" : "14.68453",
"Pressure - Flag": "1",
"Temperature (degF)": "68.43",
"Temperature - Flag": "1",
"Velocity (ft/s)": "12.4",
"Velocity Flag": "1"
},
{
"_id": {
"$oid": "5e68114763cb144f9d1be263"
},
"StartDate": {
"$date": {
"$numberLong": "1583842033000"
}
},
"EndDate": {
"$date": {
"$numberLong": "1583842434000"
}
},
"PartNumber": "1Z45NP7X",
"SerialNumber": "U84A3103",
"Status": "Acceptable",
"Pressure (PSIA)" : "14.70153",
"Pressure - Flag": "1",
"Temperature (degF)": "68.55",
"Temperature - Flag": "1",
"Velocity (ft/s)": "12.7",
"Velocity Flag": "1"
},
{
"_id": {
"$oid": "5e68115f63cb144f9d1be264"
},
"StartDate": {
"$date": {
"$numberLong": "1583842464000"
}
},
"EndDate": {
"$date": {
"$numberLong": "1583842434000"
}
},
"PartNumber": "1Z45NP7X",
"SerialNumber": "U84A3104",
"Status": "Acceptable",
"Pressure (PSIA)" : "14.59243",
"Pressure - Flag": "1",
"Weight (lbf)": "67.93",
"Weight - Flag": "1",
"Torque (ft-lbf)": "122.33",
"Torque - Flag": : "1"
}
]
An example table might look like (probably with correct spacing):
StartDate EndDate PartNumber SerialNumber Pressure 'Pressure - Flag' Temperature 'Temperature - Flag' Velocity 'Velocity - Flag' Torque 'Torque - Flag' Weight 'Weight - Flag'
2020-03-10T12:00:00Z 2020-03-10T12:06:47Z 1Z45NP7X U84A3102 14.68453 1 68.43 1 12.4 1 N/A N/A N/A
N/A
2020-03-10T12:07:13Z 2020-03-10T12:13:54Z 1Z45NP7X U84A3103 14.70153 1 68.55 1 12.7 1 N/A N/A N/A
N/A
2020-03-10T12:07:13Z 2020-03-10T12:13:54Z 1Z45NP7X U84A3104 14.59243 1 N/A N/A N/A N/A 67.93 1 122.33
1
Any thoughts on the best structure? In reality, there might be 200+ "sensor values".
Thanks,
DG