When the input parameter is a column name, returns a one-column table that contains the distinct values from the specified column. Duplicate values are removed and only unique values are returned. A BLANK value can be added. When the input parameter is a table name, returns the rows from the specified table. Duplicate rows are preserved. A BLANK row can be added.
This function cannot be used to Return values into a cell or column on a worksheet; rather, you use it as an intermediate function, nested in a formula, to get a list of distinct values that can be counted or used to filter or sum other values.
|TableName or ColumnName||A column from which unique values are to be returned, or a table from which rows are to be returned.|
When the input parameter is a column name, a single column table. When the input parameter is a table name, a table of the same columns is returned.
When you use the VALUES function in a context that has been filtered, the unique values returned by VALUES are affected by the filter. For example, if you filter by Region, and return a list of the values for City, the list will include only those cities in the regions permitted by the filter. To return all of the cities, regardless of existing filters, you must use the ALL function to remove filters from the table. The second example demonstrates use of ALL with VALUES.
This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.
For best practices when using VALUES, see Use SELECTEDVALUE instead of VALUES.
In most scenarios, when the argument is a column name, the results of the VALUES function are identical to those of the DISTINCT function. Both functions remove duplicates and return a list of the possible values in the specified column. However, the VALUES function can also return a blank value. This blank value is useful in cases where you are looking up distinct values from a related table, but a value used in the relationship is missing from one table. In database terminology, this is termed a violation of referential integrity. Such mismatches in data can occur when one table is being updated and the related table is not.
When the argument is a table name, the result of the VALUES function returns all rows in the specified table plus a blank row, if there is a violation of referential integrity. The DISTINCT function removes duplicate rows and returns unique rows in the specified table.
The DISTINCT function allows a column name or any valid table expression to be its argument but the VALUES function only accepts a column name or a table name as the argument.
The following table summarizes the mismatch between data that can occur in two related tables when referential integrity is not preserved.
|MyOrders table||MySales table|
|June 1||June 1 sales|
|June 2||June 2 sales|
|(no order dates have been entered)||June 3 sales|
If you use the DISTINCT function to return a list of dates, only two dates would be returned. However, if you use the VALUES function, the function returns the two dates plus an additional blank member. Also, any row from the MySales table that does not have a matching date in the MyOrders table will be "matched" to this unknown member.
The following formula counts the number of unique invoices (sales orders), and produces the following results when used in a report that includes the Product Category Names:
|Row Labels||Count Invoices|