Migration for beginner

I haven’t used migration for quite a while and I forgot how to do it.
I need to add a column to a certain table.
I want to use: ruby script/generate migration inactivated_at
but if I don’t write the name of the table somewhere how will it know?

script/generate migration add_inactivated_at_to_certain_table

On Fri, Jan 2, 2009 at 3:04 PM, Anita A. <

Here are the oficial guide about migrations:

All you need to know.

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