# Getting Statistics for Numeric Fields in Amazon CloudSearch

Amazon CloudSearch can return the following statistics for facet-enabled numeric fields:

`count`

–The number of documents that contain a value in the specified field.`max`

–The maximum value found in the specified field.`mean`

–The average of the values found in the specified field.`min`

–The minimum value found in the specified field.`missing`

–The number of documents that do not contain a value in the specified field.`stddev`

–A measure to quantify the amount of deviation, or variation, in the field values. A low standard deviation indicates that the values across all documents are close to the mean. A high standard deviation indicates that the values are spread out over a large range. The standard deviation is calculated by taking the square root of the variance, which is the average of the squared differences from the mean.`sum`

–The sum of the field values across all documents.`sumOfSquares`

–The sum of all field values squared.

To get statistics for a field you use the `stats.FIELD`

parameter.
`FIELD`

is the name of a facet-enabled numeric field. You specify an
empty JSON object, `stats.FIELD={}`

, to get all of the available statistics
for the specified field. (The `stats.FIELD`

parameter does not support any
options; you must pass an empty JSON object.) You can request statistics for multiple
fields in the same request.

You can get statistics only for facet-enabled numeric fields: `date`

,
`date-array`

, `double`

, `double-array`

,
`int`

, or `int-array`

. Note that only the `count`

,
`max`

, `min`

, and `missing`

statistics are returned
for `date`

and `date-array`

fields. For more information about
enabling a field to return facets, see configure indexing options.

For example, to search for *star* and get statistics for the *year* field, specify the following:

`search?q=star&stats.year={}`