cume_dist for cumulative percent

How can you do the examples on this page using the CUME_DIST analytical function? http://www.webdotdev.com/nvd/content/view/82/99999999/1/16/

I'm using a proprietary data开发者_StackOverflow社区base language and it has the CUME_DIST functions but can't seem to like the syntax of the examples on that page.

I'm especially interested in the last example. Thank you!

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Cumulative Distribution is a statistics function. It will generate an S-shaped curve for data that follows a normal distribution.

The last example on the page you cite generates a line if you place the cumulative sales on the independent axis and the Pct-To-total on the dependent axis.