Get certified for free when you join Fabric Data Days 2026 and dive into Fabric, Power BI, SQL, AI, and other essential data skills.
Join nowData Days is here! Join us now for 60+ days of learning, challenges, and connection. Learn more
Hi Everyone,
I have just started to work on Power BI. I am stuck currently.
In the table, if there is a null value for a row, I want to create new rows and copy previous date's data in the rows but not the date. Date's value I want to copy from other column.
Below tables will give the idea of my problem and the output I need.
And the output table I need is as below-
Can someone please help me with this?
Solved! Go to Solution.
let
Source = your_table,
group = Table.Group(
Source, "DateRange",
{{"x", (x) => if x[Date]{0} = null then null else x},
{"Date", (x) => if x[Date]{0} = null then x[DateRange]{0} else x[Date]{0}}}
),
down = Table.FillDown(group, {"x"}),
xpand = Table.ExpandTableColumn(down, "x", {"Transactions"})
in
xpand
let
Source = your_table,
group = Table.Group(
Source, "DateRange",
{{"x", (x) => if x[Date]{0} = null then null else x},
{"Date", (x) => if x[Date]{0} = null then x[DateRange]{0} else x[Date]{0}}}
),
down = Table.FillDown(group, {"x"}),
xpand = Table.ExpandTableColumn(down, "x", {"Transactions"})
in
xpand
Thank you so much @AlienSx . Will try this. But I need to add rows as well. Number of rows to be added depends on number of transactions present for the previous date.
Don't miss out on Data Days, June 15 through August 7. Learn Fabric, Power BI, SQL, AI and more.
Check out the May 2026 Power BI update to learn about new features.
| User | Count |
|---|---|
| 5 | |
| 4 | |
| 3 | |
| 2 | |
| 1 |
| User | Count |
|---|---|
| 11 | |
| 11 | |
| 5 | |
| 4 | |
| 3 |