var query = featureLayer.createQuery();
query.where = "STATE_NAME = 'Washington'";
query.outFields = [ "STATE_NAME", "COUNTY_NAME", "POPULATION", "(POPULATION / AREA) as 'POP_DENSITY'" ];

featureLayer.queryFeatures(query)
  .then(function(response){
     // returns a feature set with features containing the following attributes
     // STATE_NAME, COUNTY_NAME, POPULATION, POP_DENSITY
   });

view.on("pointer-move", function(event){
  var query = featureLayer.createQuery();
  query.geometry = view.toMap(event);  // the point location of the pointer
  query.spatialRelationship = "intersects";  // this is the default
  query.returnGeometry = true;
  query.outFields = [ "POPULATION" ];

  featureLayerView.queryFeatures(query)
    .then(function(response){
      // returns a feature set with features containing the
      // POPULATION attribute and each feature's geometry
    });
});

// query for the sum of the population in all features
var sumPopulation = {
  onStatisticField: "POP_2015",  // service field for 2015 population
  outStatisticFieldName: "Pop_2015_sum",
  statisticType: "sum"
};

// query for the average population in all features
var avgPopulation = {
  onStatisticField: "POP_2015",  // service field for 2015 population
  outStatisticFieldName: "Pop_2015_avg",
  statisticType: "avg"
};

// Notice that you can pass a SQL expression as a field name to calculate statistics
var populationChangeDefinition = {
  onStatisticField: "POP_2015 - POP_2010",  // service field for 2015 population
  outStatisticFieldName: "avg_pop_change_2015_2010",
  statisticType: "avg"
};

var query = layer.createQuery();
query.where = "STATE_NAME = 'Washington'";
query.outStatistics = [ sumPopulation, avgPopulation, populationChangeDefinition ];
layer.queryFeatures(query)
  .then(function(response){
     var stats = response.features[0].attributes;
     console.log("Total Population in WA": stats.Pop_2015_sum);
     console.log("Average Population in WA counties": stats.Pop_2015_avg);
     console.log("Average Population change in WA counties": stats.avg_pop_change_2015_2010);
  });

Property Overview

Property Details

datumTransformationNumber

Since: ArcGIS API for JavaScript 4.7

Datum transformation used for projecting geometries in the query results when outSpatialReference is different than the layer's spatial reference. Requires ArcGIS Server service 10.5 or greater.

declaredClassStringreadonly inherited

Since: ArcGIS API for JavaScript 4.7

The name of the class. The declared class name is formatted as esri.folder.className.

distanceNumber

Specifies a search distance from a given geometry in a spatial query. The units property indicates the unit of measurement. In essence, setting this property creates a buffer at the specified size around the input geometry. The query will use that buffer to return features in the layer or layer view that adhere to the to the indicated spatial relationship.

If querying a feature service, the supportsQueryWithDistance capability must be true.

gdbVersionString

Since: ArcGIS API for JavaScript 4.7

Specifies the geodatabase version to display for feature service queries.

geometryGeometryautocast

The geometry to apply to the spatial filter. The spatial relationship as specified by spatialRelationship will indicate how the geometry should be used to query features.

Known Limitations

Mesh geometry types are currently not supported.

geometryPrecisionNumber

Specifies the number of decimal places for geometries returned by the query operation.

groupByFieldsForStatisticsString[]

Used only in statistical queries. When one or more field names are provided in this property, the output statisics will be grouped based on unique values from those fields. This is only valid when outStatistics has been defined.

Example:

query.outStatistics = [{
  onStatisticField: "CUSTOMERS",
  outStatisticFieldName: "avg_customers",
  statisticType: "avg"
}, {
  onStatisticField: "RATING",
  outStatisticFieldName: "min_rating",
  statisticType: "min"
}, {
  onStatisticField: "1=1",
  outStatisticFieldName: "total_businesses",
  statisticType: "count"
}];
query.groupByFieldsForStatistics = [ "region" ];

// query the above stats for each region in the layer
layer.queryFeatures(query).then(displayResults);

havingString

Since: ArcGIS API for JavaScript 4.9

A condition used with outStatistics and groupByFieldsForStatistics to limit query results to groups that satisfy the aggregation function(s).

The following aggregation functions are supported in this clause: MIN | MAX | AVG | SUM | STDDEV | COUNT | VAR

Aggregation functions used in having must be included in the outStatistics as well. See the snippet below for an example of how this works.

For service-based layer queries, this parameter applies only if the supportsHavingClause property of the layer is true. This property is supported on all LayerView queries.

See also:

• ArcGIS Blog - Querying Feature Services: Having Clause

• ArcGIS REST API documentation

Example:

query.outStatistics = [{
  onStatisticField: "CUSTOMERS",
  outStatisticFieldName: "avg_customers",
  statisticType: "avg"
}, {
  onStatisticField: "RATING",
  outStatisticFieldName: "min_rating",
  statisticType: "min"
}, {
  onStatisticField: "1=1",
  outStatisticFieldName: "total_businesses",
  statisticType: "count"
}];
query.groupByFieldsForStatistics = [ "region" ];
query.having = "AVG(CUSTOMERS) >= 1,000 AND MIN(RATING) >= 3";

// query the above stats for all regions where
// the average number of daily customers per business is
// greater than 1,000 and the minimum customer rating
// for a business within the region is 3
layer.queryFeatures(query).then(displayResults);

historicMomentDate

Since: ArcGIS API for JavaScript 4.7

The historic moment to query. This parameter applies only if the supportsQueryWithHistoricMoment capability of the service being queried is true. This setting is provided in the layer resource.

maxAllowableOffsetNumber

The maximum distance in units of outSpatialReference used for generalizing geometries returned by the query operation. It limits how far any part of the generalized geometry can be from the original geometry. If outSpatialReference is not defined, the spatialReference of the data is used.

Known Limitations

This property does not apply to LayerView or CSVLayer queries.

maxRecordCountFactorNumber

Since: ArcGIS API for JavaScript 4.7

When set, the maximum number of features returned by the query will equal the maxRecordCount of the service multiplied by this factor. The value of this property may not exceed 5.

For example, if the maxRecordCount of your feature service is 2000, and you set the maxRecordCountFactor to 5, then the maximum number of features that could be returned by the query is 10000.

Known Limitations

Only supported with ArcGIS Online hosted services or ArcGIS Enterprise 10.6 services.

Default Value:1

multipatchOptionString

Parameter dictates how the geometry of a multipatch feature will be returned. Currently, the only supported value is xyFootprint. If indicated, the xy footprint of each multipatch geometry will be returned in the result.

Example:

var queryTask = new QueryTask( ... );
var query = new Query({
  objectIds: [22],
  multipatchOption: "xyFootprint",
  outFields: ["*"],
  returnGeometry: true
});
queryTask.execute(query);

numNumber

The number of features to retrieve. This option should be used in conjunction with the start property. Use this to implement paging (i.e. to retrieve "pages" of results when querying).

If not provided, but an instance of Query has a start property, then the default value of num is 10. If neither num nor start properties are provided, then the default value of num is equal to the maxRecordCount of the service, which can be found at the REST endpoint of the FeatureLayer.

Known Limitations

This property does not apply to layer view or CSVLayer queries.

objectIdsNumber[]

A comma delimited list of ObjectIDs for the features in the layer being queried.

orderByFieldsString[]

One or more field names used to order the query results. Specfiy ASC (ascending) or DESC (descending) after the field name to control the order. The default order is ASC.

Known Limitations

• If querying a MapImageLayer, then supportsAdvancedQueries must be true on the service.
• For FeatureLayer, FeatureLayer.capabilities.queryRelated.supportsOrderBy must be true.

See also:

• FeatureLayer.capabilities

Example:

query.orderByFields = ["STATE_NAME DESC"];

outFieldsString[]

Attribute fields to include in the FeatureSet. Fields must exist in the service layer. You must list actual field names rather than field aliases. You may, however, use field aliases when you display the results of the query.

When specifying the output fields, you should limit the fields to only those you expect to use in the query or the results. The fewer fields you include, the smaller the payload size, and therefore the faster the response of the query.

You can also specify SQL expressions as outFields to calculate new values server side for the query results. See the example snippets below for an example of this.

Each query must have access to the Shape and ObjectId fields for a layer. However, the list of outFields does not need to include these two fields.

Known Limitations

• If specifying outFields as expressions on a feature service-based FeatureLayer, the service capabilities advancedQueryCapabilities.supportsOutFieldSQLExpression and useStandardizedQueries must both be true.

Examples:

// query for field attributes
query.outFields = [ "NAME", "STATE_ABBR", "POP04" ];

// query for data returned from an expressions and other fields as the following field names
// POP_CHANGE_2020, NAME, POP2020
// where POP_CHANGE_2020 represents the population change from 2010 - 2020
query.outFields = [ "( (POP2020 - POP2010) / POP2010 ) * 100 as POP_CHANGE_2020", "NAME", "POP2020" ]

outSpatialReferenceSpatialReferenceautocast

The spatial reference for the returned geometry. If not specified, the geometry is returned in the spatial reference of the map.

outStatisticsStatisticDefinition[]autocast

Autocasts from Object[]

The definitions for one or more field-based statistics to be calculated. If outStatistics is specified the only other query parameters that should be used are groupByFieldsForStatistics, orderByFields, text, and where.

Known Limitations

For service-based queries, outStatistics is only supported on layers where supportsStatistics = true.

Example:

var query = new Query();
var statisticDefinition: new StatisticDefinition({
  statisticType: "sum",
  onStatisticField: "POP2000",
  outStatisticFieldName: "TotalPop"
});

query.outStatistics [ statisticsDefinition ];

parameterValuesObject[]

Since: ArcGIS API for JavaScript 4.7

Filters features from the layer based on pre-authored parameterized filters. When value is not specified for any parameter in a request, the default value, that is assigned during authoring time, gets used. Requires an ArcGIS Enterprise service 10.5 or greater.

Properties:

name String The parameter name.

value String | String[] | Number | Number[] | Date | Date[] Single value or array of values.

pixelSizeSymbolautocast

Specifies the pixel level to be identified on the X and Y axis. Defaults to the base resolution of the dataset if not specified. Applicable only to Image Service layers.

quantizationParametersObject

Used to project the geometry onto a virtual grid, likely representing pixels on the screen.

Known Limitations

Only supported with ArcGIS Online hosted services or ArcGIS Enterprise 10.6.1 services.

Properties:

extent Extent optional An extent defining the quantization grid bounds. Its SpatialReference matches the input geometry spatial reference if one is specified for the query. Otherwise, the extent will be in the layer's spatial reference.

mode String optional Geometry coordinates are optimized for viewing and displaying of data. Possible Values: view

originPosition String optional Default Value:upper-left The integer's coordinates will be returned relative to the origin position defined by this property value. Possible Values: upper-left | lower-left

tolerance Number optional The size of one pixel in the units of outSpatialReference. This number is used to convert coordinates to integers by building a grid with a resolution matching the tolerance. Each coordinate is then snapped to one pixel on the grid. Consecutive coordinates snapped to the same pixel are removed for reducing the overall response size. The units of tolerance will match the units of outSpatialReference. If outSpatialReference is not specified, then tolerance is assumed to be in the units of the spatial reference of the layer. If tolerance is not specified, the maxAllowableOffset is used. If tolerance and maxAllowableOffset are not specified, a grid of 10,000 * 10,000 grid is used by default.

Example:

var query = new Query();
query.quantizationParameters = {
  mode: "view",
  originPosition: "upper-left",
  tolerance: 4820,
  extent: layer.fullExtent
};

rangeValuesObject[]

Since: ArcGIS API for JavaScript 4.7

Filters features from the layer that are within the specified range values. Requires ArcGIS Enterprise services 10.5 or greater.

Properties:

name String The range id.

values Number | Number[] Single value or value range.

relationParameterString

The Dimensionally Extended 9 Intersection Model (DE-9IM) matrix relation (encoded as a string) to query the spatial relationship of the input geometry to the layer's features. This string contains the test result of each intersection represented in the DE-9IM matrix. Each result is one character of the string and may be represented as either a number (maximum dimension returned: 0,1,2), a Boolean value (T or F), or a mask character (for ignoring results: '*').

Set this parameter when the spatialRelationship is relation. The Relational functions for ST_Geometry topic has additional details on how to construct these strings.

Known Limitations

This property does not apply to layer view or CSVLayer queries.

Example:

var query = new Query({
  relationParameter: "FFFTTT***"
});

returnCentroidBoolean

Since: ArcGIS API for JavaScript 4.6

If true, each feature in the returned FeatureSet will be returned with a centroid. This property only applies to queries against polygon FeatureLayers.

Known Limitations

Only supported with ArcGIS Online hosted services or ArcGIS Enterprise 10.6.1 services.

Default Value:false

returnDistinctValuesBoolean

If true then the query returns distinct values based on the field(s) specified in outFields.

Known Limitations

• For service-based queries, this parameter applies only if the supportsAdvancedQueries capability of the layer is true.

Default Value:false

returnExceededLimitFeaturesBoolean

Since: ArcGIS API for JavaScript 4.6

If true, then all features are returned for each tile request, even if they exceed the maximum record limit per query indicated on the service by maxRecordCount. If false, the tile request will not return any features if the maxRecordCount limit is exceeded.

Known Limitations

Only supported with ArcGIS Online hosted services or ArcGIS Enterprise 10.6 services.

Default Value:true

returnGeometryBoolean

If true, each feature in the returned FeatureSet includes the geometry.

Known Limitations

For FeatureLayerView queries, the precision of the returned geometries will only be as high as the view's scale resolution since geometries are quantized for improved performance on the view. The smaller the scale, the lower the resolution of the geometries.

This limitation does not apply to FeatureLayer, CSVLayer, and CSVLayerView queries.

Default Value:false

returnMBoolean

Since: ArcGIS API for JavaScript 4.6

If true, and returnGeometry is true, then m-values are included in the geometry.

returnZBoolean

If true, and returnGeometry is true, then z-values are included in the geometry.

spatialRelationshipString

For spatial queries, this parameter defines the spatial relationship to query features in the layer or layer view against the input geometry. See the Types of spatial relationships that can be validated document for more details about each spatial relationship.

The possible values are listed in the table below:

Value	Description
intersects	Returns features from the layer or layer view that intersect the input geometry.
contains	Returns features from the layer or layer view that are completely contained by the input geometry.
crosses	Returns features from the layer or layer view that cross the input geometry.
envelope-intersects	Returns features from the layer or layer view that intersect the envelope (or extent) of the input geometry.
index-intersects	The envelope of the query feature class intersects the index entry for the target feature class.
overlaps	Returns features from the layer or layer view that overlap the input geometry.
touches	Returns features from the layer or layer view that touch the input geometry.
within	Returns features from the layer or layer view that are completely within the input geometry.
relation	Allows specification of any relationship defined using the Shape Comparison Language. If this value is specified, then the relationParameter must also be specified.

Default Value:intersects

Example:

var query = new Query({
  spatialRelationship: "contains"
});

sqlFormatString

Since: ArcGIS API for JavaScript 4.7

This parameter can be either standard SQL92 standard or it can use the native SQL of the underlying datastore native. See the ArcGIS REST API documentation for more information.

Possible Values: none | standard | native

Known Limitations

This property does not apply to layer view or CSVLayer queries.

Default Value:none

startNumber

The zero-based index indicating where to begin retrieving features. This property hould be used in conjunction with num. Use this to implement paging and retrieve "pages" of results when querying. Features are sorted ascending by object ID by default.

Known Limitations

This property does not apply to layer view or CSVLayer queries.

textString

Shorthand for a where clause using "like". The field used is the display field defined in the services directory.

Default Value:null

unitsString

The unit for calculating the buffer distance when distance is specified in spatial queries. if unit is not specified, the unit is derived from the layer or layer view's SpatialReference.

Known Limitations

For service-based queries, this parameter only applies if supportsQueryWithDistance is true.

Possible Values: feet | miles | nautical-miles | us-nautical-miles | meters | kilometers

whereString

A where clause for the query. Any legal SQL where clause operating on the fields in the layer is allowed. Be sure to have the correct sequence of single and double quotes when writing the where clause in JavaScript.

Examples:

query.where = "NAME = '" + stateName + "'";

query.where = "POP04 > " + population;

Method Overview

Method Details

clone(){Query}

Since: ArcGIS API for JavaScript 4.6

Creates a deep clone of Query object.

Returns:

Type	Description
Query	A new instance of a Query object equal to the object used to call .clone().

fromJSON(json){*}static

Creates a new instance of this class and initializes it with values from a JSON object generated from a product in the ArcGIS platform. The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.

Parameter:

json Object A JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.

Returns:

Type	Description
*	Returns a new instance of this class.

toJSON(){Object}

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() topic in the Guide for more information.

Returns:

Type	Description
Object	The ArcGIS portal JSON representation of an instance of this class.