FIRSTNONBLANKVALUE DAX Function (Time Intelligence) Context Transition
Returns the first non blank value of the expression that evaluated for the column.
Syntax
| Parameter | Attributes | Description |
|---|---|---|
|
ColumnName Iterator |
The source values. |
|
|
Expression Row Context |
The expression to be evaluated for each value. |
Return values
The first non-blank value of Expression iterating ColumnName in natural ascending order.
Notes
In order to use any time intelligence calculation, you need a well-formed date table. The Date table must satisfy the following requirements:
- All dates need to be present for the years required. The Date table must always start on January 1 and end on December 31, including all the days in this range. If the report only references fiscal years, then the date table must include all the dates from the first to the last day of a fiscal year. For example, if the fiscal year 2008 starts on July 1, 2007, then the Date table must include all the days from July 1, 2007 to June 30, 2008.
- There needs to be a column with a DateTime or Date data type containing unique values. This column is usually called Date. Even though the Date column is often used to define relationships with other tables, this is not required. Still, the Date column must contain unique values and should be referenced by the Mark as Date Table feature. In case the column also contains a time part, no time should be used – for example, the time should always be 12:00 am.
- The Date table must be marked as a date table in the model, in case the relationship between the Date table and any other table is not based on the Date.
Remarks
The Expression is evaluated in a filter context obtained by a context transition. Therefore, even though the function iterates a column, it doesn’t provide a row context.
The ColumnName argument can be any of the following:
- A reference to a column. Only in this case a context transition applies because the column reference is replaced by
- CALCULATETABLE ( DISTINCT ( <ColumnName> ) )
- A table expression that returns a single column.
- A Boolean expression that defines a single column.
Even though this function is commonly used for dates, it can be applied to a column of any data type.
The syntax:
FIRSTNONBLANKVALUE (
<ColumnName>,
<Expression>
)
corresponds to:
CALCULATE (
<Expression>,
FIRSTNONBLANK (
<ColumnName>,
CALCULATE ( <Expression> )
)
)
» 3 related functions
Examples
-- FIRSTNONBLANKVALUE and LASTNONBLANKVALUE return the first and last
-- non blank values in the selection.
EVALUATE
CALCULATETABLE (
ADDCOLUMNS ( VALUES ( 'Date'[Date] ), "Sales Amount", [Sales Amount] ),
'Date'[Date] >= DATE ( 2007, 2, 8 ) &&
'Date'[Date] <= DATE ( 2007, 2, 15 )
)
EVALUATE
CALCULATETABLE (
{ FIRSTNONBLANKVALUE ( 'Date'[Date], [Sales Amount] ) },
'Date'[Date] >= DATE ( 2007, 2, 8 ) &&
'Date'[Date] <= DATE ( 2007, 2, 15 )
)
EVALUATE
CALCULATETABLE (
{ LASTNONBLANKVALUE ( 'Date'[Date], [Sales Amount] ) },
'Date'[Date] >= DATE ( 2007, 2, 8 ) &&
'Date'[Date] <= DATE ( 2007, 2, 15 )
)
| Date | Sales Amount |
|---|---|
| 2007-02-08 | (Blank) |
| 2007-02-09 | 70,032.69 |
| 2007-02-10 | 27,487.70 |
| 2007-02-11 | 28,419.46 |
| 2007-02-12 | 64,176.29 |
| 2007-02-13 | 56,046.10 |
| 2007-02-14 | 26,612.37 |
| 2007-02-15 | (Blank) |
| Value |
|---|
| 70,032.69 |
| Value |
|---|
| 26,612.37 |
Related articles
Learn more about FIRSTNONBLANKVALUE in the following articles:
-
Semi-Additive Measures in DAX
Values such as inventory and balance account, usually calculated from a snapshot table, require the use of semi-additive measures. In Multidimensional you have specific aggregation types, like LastChild and LastNonEmpty. In PowerPivot and Tabular you use DAX, which is flexible enough to implement any calculation, as described in this article. » Read more
-
Optimizing LASTNONBLANK and LASTNONBLANKVALUE calculations
This article explains the behavior of LASTNONBLANK, LASTNONBLANKVALUE, and similar DAX functions, also providing patterns for performance optimization. » Read more
Related functions
Other related functions are:
Last update: Nov 14, 2024 » Contribute » Show contributors
Contributors: Alberto Ferrari, Marco Russo, Kenneth Barber
Microsoft documentation: https://docs.microsoft.com/en-us/dax/firstnonblankvalue-function-dax