# Migration for beginner

**URL:** <https://www.ruby-forum.com/t/migration-for-beginner/156794>\
**Category:** Rails\
**Created:** [January 3, 2009, 12:04am UTC](https://www.ruby-forum.com/t/migration-for-beginner/156794 "2009-01-03T00:04:38Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![anita](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/49beb7/32.png) [@anita](https://www.ruby-forum.com/u/anita)\
**Post date:** [January 3, 2009, 12:04am UTC](https://www.ruby-forum.com/t/migration-for-beginner/156794/1 "2009-01-03T00:04:38Z")

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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?

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**Author:** ![anita](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/49beb7/32.png) [@anita](https://www.ruby-forum.com/u/anita)\
**Post date:** [January 3, 2009, 12:28am UTC](https://www.ruby-forum.com/t/migration-for-beginner/156794/2 "2009-01-03T00:28:36Z")

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script/generate migration add\_inactivated\_at\_to\_certain\_table  
inactivated\_at:date

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

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**Author:** ![anita](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/49beb7/32.png) [@anita](https://www.ruby-forum.com/u/anita)\
**Post date:** [January 3, 2009, 11:20am UTC](https://www.ruby-forum.com/t/migration-for-beginner/156794/3 "2009-01-03T11:20:38Z")

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Here are the oficial guide about migrations:

> **[rails.info](http://guides.rails.info/migrations.html)**
>
> Ruby on Rails,Rails Tutorial,Ruby Basics,Rails 4,Bar Rails,Rail

All you need to know.