THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
Data query
There are several types of data queries
Aggregate query
Downsampling query
Single point supplementary null query
Latest data query
Align by device query
Group by fill query
In order to achieve the above kinds of queries, a basic query component for a single time series is designed in the IoTDB query engine, and on this basis, various query functions are implemented.