Adding and deleting columns
Add a new column to the table and then delete it.
Note
We assume that you already created tables in step Creating a table and populated them with data in step Adding data to a table.
Adding a column
Add a non-key column to the existing table:
ALTER TABLE episodes ADD COLUMN viewers Uint64;
Deleting a column
Delete the column you added from the table:
ALTER TABLE episodes DROP COLUMN viewers;