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README

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1 parent 47cb26e commit 3346c0927f8c66c998b2454c059f339c1da43310 @winton committed Jun 10, 2010
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@@ -15,11 +15,7 @@ Create columns
For every counter column (X), you should also have a <code>X\_computed\_at</code> datetime column.
-To define period columns, use this format: <code>X\_last\_1\_week</code> or <code>X\_last\_6\_hours</code>.
-
-The name the period column should follow the format of ActiveSupport's time extensions:
-
-http://api.rubyonrails.org/classes/ActiveSupport/CoreExtensions/Numeric/Time.html
+To define period columns, use this format: <code>X\_last\_1\_week</code> or <code>X\_last\_6\_hours</code>. The name should follow the format of [ActiveSupport's time extensions](http://api.rubyonrails.org/classes/ActiveSupport/CoreExtensions/Numeric/Time.html).
If you are adding this to a counter that already has a count, you will also need a <code>X\_starting\_value</code> integer column.

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