Entries in in-place table operation (2)

How do I delete a column from a table?

The delete command works for that, too. To remove a column named xyz from table t, use

delete xyz from `t // in place delete (backquote)
delete xyz from t  // returns a copy minus column xyz

How do I delete the nth row from a table?

Use delete and the virtual column i:

delete from `t where i = n

Don't forget the backquote if you intend to delete-in-place.