This function returns the top three items from the network data projection to provide an overview of the useful columns and their schema. For example:
```["unifi_devices.name",
"unifi_devices.model",
"unifi_devices.device_type",
"unifi_devices.ip",
"unifi_devices.mac",
"unifi_devices.version"]```
Ensure the structure is hierarchical from the top level to the desired field.
Continue gathering more details or calculation by executing **get_value_from_selected_key_and_columns** or use it to perform calculation when necessary like $count, $sum, $multiply, $divide. etc.
How to Use
Use with LangChain: `hub.pull("buckylee/list_column")`
