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Post Prodigy

## Average Rate of Consumption for the one year

Hi Power BI Experts,

I am calculating the average rate of consumption per day for the current date to last one year.

3 REPLIES 3
Community Support

You can refer to the following example.

Create two columns in the  table:

``````Rate = var a=MINX(FILTER('Table',[Date]>EARLIER('Table'[Date])),[Date])
var b=LOOKUPVALUE('Table'[Tank Level],[Date],a)
return [Tank Level]-b

Average_rate = AVERAGE('Table'[Rate])``````

Best Regards,

Xinru Zhu

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Post Prodigy

For the above table there is another column as date & time which show's one every one date record it is divided into 60seconds*24hours=1440 records. I have added instead of date column with date & time. I tried to execute the above expression it is taking more than 1 hour to execute. How can i minimize the query after adding the date & time column instead of date. Please help.

Below is the expression i modified.

``````Rate = var a=MINX(FILTER('Table',[Date & Time]>EARLIER('Table'[Date & Time])),[Date & Time])
var b=LOOKUPVALUE('Table'[Tank Level],[Date & Time],a)
return [Tank Level]-b

Average_rate = AVERAGE('Table'[Rate])``````
Community Support

The dateset is large, so the calculation will be affected, it cannot be  minimized, you may need to

reduce the amount of data.

Best Regards,

Xinru Zhu

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

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