Aggregation Options
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Dragging a field onto an aggregation encoding channel allows you to use an aggregation pipeline operator on that field.
The aggregation pipeline operators available in the chart
builder change based on the data type
of the selected field. MongoDB Charts categorizes the field data type
as either a number, string, or date and displays
appropriate aggregation options accordingly.
The following tables list the available aggregation options for each data type:
Numbers
Aggregation Option | Description | Pipeline Operation |
|---|---|---|
sum | Sums all values in the field. | |
count | Counts the number of documents with a value in the field. | |
count by value | Counts the number of distinct values in the field and creates a
series based on the values. | |
distinct | Counts the number of unique values in the field. | |
mean | Averages all values in the field. | |
min | Returns the minimum value in the field. | |
max | Returns the minimum value in the field. | |
variance | Calculates the sample variance of values in the field. | Applies
$stdDevSamp
and raises the result to the 2nd power with
$pow. |
variancep | Calculates the population variance of values in the field. | Applies
$stdDevPop
and raises the result to the 2nd power with
$pow. |
stdev | Calculates the sample standard deviation of values in the field. | |
stdevp | Calculates the population standard deviation of values in the
field. |
Strings and Dates
Aggregation Option | Description | Pipeline Operation |
|---|---|---|
count | Counts the number of documents with a value in the field. | |
count by value | Counts the number of distinct values in the field and creates a
series based on the values. | |
distinct | Counts the number of unique values in the field. |