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I noticed that if I rename a column name include ., e.g., device.name, it would be automatically converted to device_name in BigQuery.
select Device device.name from mydataset.DeviceTable limit 10
Is there anyway I can use dot in column names?
Dots are reserved for indicating nesting. You can import nested data via json import (e.g.
{device: {name "foo"}}).Query results get flattened, and so dots in query results will get turned to underscores.