Counts the number of rows in a table or group for which all given conditions are true.
condition 1 (required) The condition to test. If the condition is true, then the row will be counted.
condition 2+ (optional) Additional conditions to test. If multiple conditions are given, they must all be True in order to be counted
Aggregate functions are special functions which summarize columns from lower levels. Aggregate functions can be used on on Grouped levels or in a Total column. For example, they can be used to Sum all of the values of a column, or Count all of the values for each grouping of a column. As such, aggregates must always refer to columns in a level lower than the result.
If the column being aggregated is grouped, then the aggregate is computed for each group. For example, if the worksheet is grouped by the column [Year], then placing Sum([Revenue]) on the [Year] level computes the revenue for each year.
The results of aggregate functions can be referenced by lower levels. An example would be to create a Sum([Amount]) column as Total and then an [Amount] / [Total] column as Percentage. This converts each Amount value into a relative percentage value.