Use the Change Column notebook to modify a column for the table that you're creating or altering. These steps are part of the larger tasks of creating a table and altering a table. When you complete these steps, return to either creating a table or altering a table.
To change a column:
If you change the column name and you are using this column in a primary key, a unique key, or a foreign key, you must go back and revise the definitions for those keys.
Restriction: If you are changing a column that has already been committed in the table, the only field that you can modify is the Comment field. The comment can be from 1 to 254 characters long.
Depending on the task that you were doing when you changed this column, return to either creating a table or altering a table.