2024-10-01 01:48:49 发布
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从查询中:
session.query(Record, RecordMeasurement).filter(Record.record_pkid==RecordMeasurement.record_fkid)
我想构造一个由记录列中的值组成的数据帧:
和记录测量列:
['power', 'voltage', 'temperature']
dataframes列顺序无关紧要。在
将查询更改为只包含所需的列:
query = (session.query( Record.datetime, Record.record_number, RecordMeasurement.power, RecordMeasurement.voltage, RecordMeasurement.temperature, ) .filter(Record.record_pkid==RecordMeasurement.record_fkid) )
然后打电话:
将查询更改为只包含所需的列:
然后打电话:
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