SUMMARIZE DAX Function (Table manipulation)

Creates a summary of the input table grouped by the specified columns.

Syntax

SUMMARIZE ( <Table> [, <GroupBy_ColumnName> [, [<Name>] [, [<Expression>] [, <GroupBy_ColumnName> [, [<Name>] [, [<Expression>] [, … ] ] ] ] ] ] ] )

Parameter	Attributes	Description
Table		The input table.
GroupBy_ColumnName	Optional Repeatable	A column to group by or a call to ROLLUP function to specify a list of columns to group by with subtotals.
Name Not recommended Deprecated	Optional Repeatable	A column name to be added.
Expression Row Context Not recommended Deprecated	Optional Repeatable	The expression of the new column is executed in both a row context and a filter context.

Table An entire table or a table with one or more columns.

A table with the selected columns for the GroupBy_ColumnName arguments and the summarized columns designed by the name arguments.

The GroupBy_ColumnName must be either in table or in a related table to Table.

SUMMARIZE should not be used to add columns. As an alternative, use SUMMARIZECOLUMNS or ADDCOLUMNS / SUMMARIZE.

Learn more about SUMMARIZE in the following articles:

Best Practices Using SUMMARIZE and ADDCOLUMNS

Everyone using DAX is probably used to SQL query language. Because of the similarities between the Tabular data modeling and the relational data modeling, there is the expectation that you can perform the same operations as those allowed in SQL. However, in its current implementation DAX does not permit all the operations that you can […] » Read more
All the secrets of SUMMARIZE

SUMMARIZE is a function that looks quite simple, but its functionality hides some secrets that might surprise even seasoned DAX coders. In this article, we analyze the behavior of SUMMARIZE, in order to completely describe its semantic. The final advice might surprise you: we will suggest to avoid the use of SUMMARIZE in your code, […] » Read more
From SQL to DAX: Grouping Data

The GROUP BY condition of a SQL statement is natively implemented by SUMMARIZE in DAX. This article shows how to use SUMMARIZE and an alternative syntax to group data. » Read more
From SQL to DAX: Projection

This article describes projection functions and techniques in DAX, showing the differences between SELECTCOLUMNS, ADDCOLUMNS, and SUMMARIZE. » Read more

Other related functions are:

Contributors: Alberto Ferrari, Marco Russo