How to name a table column including dot?

问题

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?

回答1:

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.

来源：https://stackoverflow.com/questions/13829677/how-to-name-a-table-column-including-dot