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Frequent Visitor

## calculated column for frequency of dates

Hello, I am new on this platform and I need help concerning Power BI!

I have a table named Orders, which indicate, for each order, the user name and the date of the order. On the table Users, I would like to create a calculated column named "frequency of orders" which would calculate the frequency of orders for each user.

for example, user3 has made 2 orders, at 7 days of difference, so the frequency should be equal to 7.

Could you help me for that ?

Thanks a lot, 1 ACCEPTED SOLUTION
Frequent Visitor

Thanks you so much for your help!

In fact with your formula for "frequency of orders", the results for my file is always 0... I have created columns "first date" and "last date" and "frequency bis" and now it works well!

Thanks you again!!!

```first date =
CALCULATE(
FIRSTDATE ( Orders[created_at] );
FILTER(Orders ; Orders[user_name] = Users[user_name])
)
last date =
CALCULATE(
LASTDATE( Orders[created_at] );
FILTER(Orders ; Orders[user_name] = Users[user_name])
)
frequency bis =
DIVIDE (
DATEDIFF (
Users[first date];
Users[last date];
DAY
);
Users[number of orders] - 1;
0
)``` 3 REPLIES 3
Frequent Visitor

Why does your solution minus 1 from the number of orders? Community Champion

2 Calculated COLUMNS

```number of orders =
CALCULATE (
COUNTROWS ( Orders ),
FILTER ( Orders, Orders[user_name] = Users[user_name] )
)

frequency of orders =
DIVIDE (
DATEDIFF (
FIRSTDATE ( Orders[created_at] ),
LASTDATE ( Orders[created_at] ),
DAY
),
Users[number of orders] - 1,
0
)```

and the result Hope this helps! Frequent Visitor

Thanks you so much for your help!

In fact with your formula for "frequency of orders", the results for my file is always 0... I have created columns "first date" and "last date" and "frequency bis" and now it works well!

Thanks you again!!!

```first date =
CALCULATE(
FIRSTDATE ( Orders[created_at] );
FILTER(Orders ; Orders[user_name] = Users[user_name])
)
last date =
CALCULATE(
LASTDATE( Orders[created_at] );
FILTER(Orders ; Orders[user_name] = Users[user_name])
)
frequency bis =
DIVIDE (
DATEDIFF (
Users[first date];
Users[last date];
DAY
);
Users[number of orders] - 1;
0
)```    