It's generally possible to select and copy complete records. Is it possible to select and copy only one column of a result and paste into a notepad document?
WORKAROUND:
1. Execute a SQL statement in the Editor. A Data Grid with the results will appear below.
2. Right mouse click on the Data Grid, click "Select Columns..." Check the column or columns you want.
3. Click OK and return to the Data Grid. If necessary, right mouse click the Data Grid, check on "Multi-select."
4. You should now be able to highlight the entire column with Shift+Left Click or Ctrl+Left Click. You can also copy and paste the highlighted column.
STATUS:
Waiting for enhancement request to be included in a future version of Toad for Oracle.