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Showing content from https://cloud.google.com/nodejs/docs/reference/datastore/6.3.1/datastore/query below:

Class Query | Node.js client library

Class Query

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Build a Query object.

**Queries are built with {module:datastore#createQuery} and .**

[Datastore Queries]http://goo.gl/Cag0r6

Package@google-cloud/datastore! Constructors (constructor)(scope, kinds)

constructor(scope?: Datastore | Transaction, kinds?: string[] | null);

Constructs a new instance of the Query class

Parameters Type Name Description Datastore | Transaction scope string[] | null kinds (constructor)(scope, namespace, kinds)

constructor(scope?: Datastore | Transaction, namespace?: string | null, kinds?: string[]);

Constructs a new instance of the Query class

Parameters Type Name Description Datastore | Transaction scope string | null namespace string[] kinds Properties endVal

endVal: string | Buffer | null;

Property Value Type Description string | Buffer | null filters Property Value Type Description Filter[] groupByVal Property Value Type Description Array<{}> kinds Property Value Type Description string[] limitVal Property Value namespace

namespace?: string | null;

Property Value Type Description string | null offsetVal Property Value orders Property Value scope

scope?: Datastore | Transaction;

Property Value Type Description Datastore | Transaction selectVal Property Value Type Description Array<{}> startVal

startVal: string | Buffer | null;

Property Value Type Description string | Buffer | null Methods end(end)

end(end: string | Buffer): this;

Parameter Type Name Description string | Buffer end Returns Type Description this

{Query}

filter(property, value)

filter(property: string, value: {}): Query;

Parameters Type Name Description string property {} value Returns filter(property, operator, value)

filter(property: string, operator: Operator, value: {}): Query;

Parameters Type Name Description string property Operator operator {} value Returns groupBy(fieldNames)

groupBy(fieldNames: string | string[]): this;

Group query results by a list of properties.

Parameter Type Name Description string | string[] fieldNames Returns Type Description this

{Query}

hasAncestor(key)

hasAncestor(key: Key): this;

Parameter Type Name Description Key key

Key object to filter by.

Returns Type Description this

{Query}

limit(n) Parameter Type Name Description number n

The number of results to limit the query to.

Returns Type Description this

{Query}

offset(n) Parameter Type Name Description number n

The offset to start from after the start cursor.

Returns Type Description this

{Query}

order(property, options)

order(property: string, options?: OrderOptions): this;

Parameters Type Name Description string property

The property to order by.

OrderOptions options

Options object.

Returns Type Description this

{Query}

run(options)

run(options?: RunQueryOptions): Promise<RunQueryResponse>;

Parameter Type Name Description RunQueryOptions options Returns Type Description Promise<RunQueryResponse> run(options, callback)

run(options: RunQueryOptions, callback: RunQueryCallback): void;

Parameters Type Name Description RunQueryOptions options RunQueryCallback callback Returns run(callback)

run(callback: RunQueryCallback): void;

Parameter Type Name Description RunQueryCallback callback Returns runStream(options)

runStream(options?: RunQueryStreamOptions): import("stream").Transform;

Run the query as a readable object stream.

Query#runStream

Parameter Type Name Description RunQueryStreamOptions options

Optional configuration. See for a complete list of options.

Returns Type Description import("stream").internal.Transform

{stream}

select(fieldNames)

select(fieldNames: string | string[]): this;

Parameter Type Name Description string | string[] fieldNames

Properties to return from the matched entities.

Returns Type Description this

{Query}

start(start)

start(start: string | Buffer): this;

Parameter Type Name Description string | Buffer start Returns Type Description this

{Query}

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-07 UTC.

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