I am working on AWS IoT to develop my custom solution based on a set of sensors, and I have a problem regarding how to write the SQL statement related to the kind of data I receive from a Zigbee sensor.
An example of what I receive from my sensor is reported here:
{
"type": "reportAttribute",
"from": "WIFI",
"deviceCode": "aws_device_code",
"to": "CLOUD",
"mac": "30:ae:7b:e2:e1:e6",
"time": 1668506014,
"data": {...}
}
What I would like to do is to select messages that have the from
field equal to GREENPOWER
, something along the lines of SELECT * FROM 'test' WHERE from = 'GREENPOWER'
, but from
is also a keyword in SQL hence my problem. I am no expert whatsoever in SQL, so I am not sure how this can be done. I am also looking for a way to modify the received data, but solving this problem on AWS would be much easier.
Thank you very much for your help!
CodePudding user response:
There are quite a lot of SQL functions that exist in AWS IoT Rule. You can find them here: https://docs.aws.amazon.com/iot/latest/developerguide/iot-sql-functions.html
In your case, something like this should work:
SELECT * FROM 'test' WHERE get(*, "from") = "GREENPOWER"