COUNTBLANK DAX Function (Aggregation)
Counts the number of blanks in a column.
Syntax
| Parameter | Attributes | Description |
|---|---|---|
| ColumnName |
The column containing the blanks to be counted. |
Return values
If no rows are found that meet the blank condition, the function returns blank.
Remarks
The function never returns 0. If there are no rows or no blanks, it returns always blank.
Any empty string is considered as a blank for COUNTBLANK purposes, even though ISBLANK would return FALSE for an empty string.
Even though COUNTBLANK is semantically equivalent to the following expressions, it may be slower than corresponding syntax based on CALCULATE.
-- Example of COUNTBLANK over a column
COUNTBLANK ( 'Table'[Column] )
-- Semantically equivalent expression that can be faster (only for columns that are not strings):
CALCULATE (
COUNTROWS ( 'Table' ),
KEEPFILTERS ( ISBLANK ( 'Table'[Column] ) )
)
-- Semantically equivalent expression that can be faster (only for columns that are strings):
CALCULATE (
COUNTROWS ( 'Table' ),
KEEPFILTERS ( 'Table'[Value] = "" )
)
Examples
-- COUNTBLANK counts both empty strings and blanks
-- For numeric columns, COUNTBLANK only considers blanks
DEFINE
MEASURE Customer[# No Name 1] = COUNTBLANK ( Customer[Customer Name] )
MEASURE Customer[# No Name 2] =
CALCULATE (
COUNTROWS ( Customer ),
KEEPFILTERS ( Customer[Customer Name] = "" )
)
MEASURE Customer[# No Birth Date 1] =
COUNTBLANK ( Customer[Birth Date] )
MEASURE Customer[# No Birth Date 2] =
CALCULATE (
COUNTROWS ( Customer ),
KEEPFILTERS ( ISBLANK ( Customer[Birth Date] ) )
)
EVALUATE
SUMMARIZECOLUMNS (
Customer[Continent],
"# No Name 1", [# No Name 1],
"# No Name 2", [# No Name 2],
"# No Birth Date 1", [# No Birth Date 1],
"# No Birth Date 2", [# No Birth Date 2]
)
| Continent | # No Name 1 | # No Name 2 | # No Birth Date 1 | # No Birth Date 2 |
|---|---|---|---|---|
| North America | 276 | 276 | 276 | 276 |
| Europe | 42 | 42 | 42 | 42 |
| Asia | 67 | 67 | 67 | 67 |
-- COUNTBLANK handles empty strings like blanks
-- The version with CALCULATE makes the intention of the developer clearer
DEFINE
MEASURE Customer[# COUNTBLANK] =
COUNTBLANK ( Customer[Customer Name] )
MEASURE Customer[# EMPTY STRING / BLANK] =
CALCULATE ( COUNTROWS ( Customer ), Customer[Customer Name] = "" )
MEASURE Customer[# EMPTY STRING ONLY] =
CALCULATE ( COUNTROWS ( Customer ), Customer[Customer Name] == "" )
MEASURE Customer[# BLANK ONLY 1] =
CALCULATE ( COUNTROWS ( Customer ), Customer[Customer Name] == BLANK () )
MEASURE Customer[# BLANK ONLY 2] =
CALCULATE ( COUNTROWS ( Customer ), ISBLANK ( Customer[Customer Name] ) )
EVALUATE
SUMMARIZECOLUMNS (
Customer[Continent],
"# COUNTBLANK", [# COUNTBLANK],
"# EMPTY STRING / BLANK", [# EMPTY STRING / BLANK],
"# EMPTY STRING ONLY", [# EMPTY STRING ONLY],
"# BLANK ONLY 1", [# BLANK ONLY 1],
"# BLANK ONLY 2", [# BLANK ONLY 2]
)
ORDER BY [Continent]
| Continent | # COUNTBLANK | # EMPTY STRING / BLANK | # EMPTY STRING ONLY | # BLANK ONLY 1 | # BLANK ONLY 2 |
|---|---|---|---|---|---|
| Asia | 67 | 67 | 33 | 34 | 34 |
| Europe | 42 | 42 | 21 | 21 | 21 |
| North America | 276 | 276 | 138 | 138 | 138 |
Related functions
Other related functions are:
Last update: Nov 14, 2024 » Contribute » Show contributors
Contributors: Alberto Ferrari, Marco Russo
Microsoft documentation: https://docs.microsoft.com/en-us/dax/countblank-function-dax