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Frequent Visitor

## difference between rows of a date column

how i can calculate difference b/w rows of a Task date column as  calculated column

1 ACCEPTED SOLUTION
Employee

Hi @AtharNoraiz,

Add an index column first in Query Editor mode.

Then, create a calculated column with below DAX.

```Datediff =
DATEDIFF (
CALCULATE (
MAX ( Table4[Task Date] ),
FILTER ( Table4, Table4[Index] = EARLIER ( Table4[Index] ) - 1 )
),
Table4[Task Date],
DAY
)```

Best regards,

Yuliana Gu

Community Support Team _ Yuliana Gu
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
3 REPLIES 3
Employee

Hi @AtharNoraiz,

Add an index column first in Query Editor mode.

Then, create a calculated column with below DAX.

```Datediff =
DATEDIFF (
CALCULATE (
MAX ( Table4[Task Date] ),
FILTER ( Table4, Table4[Index] = EARLIER ( Table4[Index] ) - 1 )
),
Table4[Task Date],
DAY
)```

Best regards,

Yuliana Gu

Community Support Team _ Yuliana Gu
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Frequent Visitor

thanks works perfect

Super User

Use EARLIER. See my article on Mean Time Before Failure (MTBF) which uses EARLIER: http://community.powerbi.com/t5/Community-Blog/Mean-Time-Between-Failure-MTBF-and-Power-BI/ba-p/3395...

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