gli elementi doppi, lasciando dunque solo elementi singoli diversi fra loro. La funzione COUNT invece, chiede a MySQL di restituirci il numero di elementi presenti in una colonna, qualora volessimo ...

The basic syntax of the COUNT function in SQL is: COUNT (expression) The expression can be a column name, a constant value, or a combination of them. The COUNT function returns the number of non ...

This function returns the approximate number of unique non-null values in a group. :::image type="icon" source="../../includes/media/topic-link-icon.svg" border ...

Some good news for those of you using DirectQuery mode in Power BI: the ApproximateDistinctCount DAX function, which returns an estimate of the number of the distinct values in a column and which can ...