Mongodb aggregation

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Aggregat - Auf Maschinensucher

  1. Aggregation operations group values from multiple documents together, and can perform a variety of operations on the grouped data to return a single result. MongoDB provides three ways to perform aggregation: the aggregation pipeline, the map-reduce function, and single purpose aggregation methods
  2. MongoDB also supports same concept in aggregation framework. There is a set of possible stages and each of those is taken as a set of documents as an input and produces a resulting set of documents (or the final resulting JSON document at the end of the pipeline). This can then in turn be used for the next stage and so on
  3. The MongoDB aggregation pipeline always consists of stages. Every stage transforms the documents as they submit them to the pipeline. Pipeline stages don't get to turn out one output document for each input document, e.g. some stages might generate new documents or filtered documents as a result. Pipeline stages will execute multiple times within the pipeline. MongoDB provides the db.
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  5. In MongoDB, aggregation can be defined as the operation that is used for processing various types of data in the collection, which returns a calculated result. The concept of aggregation mainly clusters out your data from multiple different documents which are then used and operates in lots of ways (on these clustered data) to return a combined result which can bring new information to the.
  6. ation (i.e. killOp on the operation)

For aggregation expression operators to use in the pipeline stages, see Aggregation Pipeline Operators. db.aggregate() Stages ¶ Starting in version 3.6, MongoDB also provides the db.aggregate method Starting in MongoDB 3.6, you can use the variable REMOVE in aggregation expressions to conditionally suppress a field. Consider a books collection with the following document: cop Map-Reduce to Aggregation Pipeline; Aggregation Reference. Aggregation Pipeline Quick Reference; Aggregation Commands; Aggregation Commands Comparison; Variables in Aggregation Expressions; SQL to Aggregation Mapping Chart; Data Models. Data Modeling Introduction; Schema Validation; Data Modeling Concepts. Data Model Design; Operational Factors.

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MongoDB 聚合 MongoDB中聚合(aggregate)主要用于处理数据(诸如统计平均值,求和等),并返回计算后的数据结果。有点类似sql语句中的 count(*)。 aggregate() 方法 MongoDB中聚合的方法使用aggregate()。 语法 aggregate() 方法的基本语法格式如下所示: >db.COLLECTION_NAME.aggregate(AGGREGATE_OPERATION) 实. To build our MongoDB aggregation example, we will be using the Aggregation Editor, the stage-by-stage aggregation pipeline editor in Studio 3T. Build accurate aggregation queries and make debugging easier by defining stage operators and checking inputs and outputs at each stage. Download it here, or if you have already done so, skip to the example Aggregation in MongoDB. Aggregation in MongoDB is nothing but an operation used to process the data that returns the computed results. Aggregation basically groups the data from multiple documents and operates in many ways on those grouped data in order to return one combined result. In sql count(*) and with group by is an equivalent of MongoDB aggregation. Aggregate function groups the. MongoDB, A Database with Porpoise - When You Have a Whale of a Performance Problem; MongoDB Atlas Pricing & Tips to Help Manage Costs; How to Change a Field Type in MongoDB; The Beginner's Guide to MongoDB Aggregation (With Exercise) MongoDB University Alternatives: 10+ Resources You Should Check Ou

As you will see in later examples, manually writing MongoDB aggregation queries can get quite cumbersome. Debugging, as you add more stages, will prove to be more difficult without a quick way to check inputs and outputs, which is a feature available in Aggregation Editor When you're performing aggregation in MongoDB, there's a lot going on behind the scenes. Documents go into an aggregation pipeline that consists of multiple stages; at each stage, the documents undergo some type of transformation. In some situations, you may need to count the documents that were passed to a certain stage of the pipeline and then pass that number to the next stage. We can.

Aggregation — MongoDB Manua

  1. Aggregation pipelines transform your documents into aggregated results based on selected pipeline stages. The Atlas aggregation pipeline builder is primarily designed for building pipelines, rather than executing them. The pipeline builder provides an easy way to export your pipeline to execute in a driver. To access the Data Explorer: Click Clusters in the top-left corner of Atlas. Click.
  2. MongoDB Aggregation Lookup Match. Ask Question Asked today. Active today. Viewed 9 times -1. select * from log where date >= 'xxxx' and date <= 'zzzz' and user in (select user from user where date >= 'xxxx' and date <= 'zzzz') plz mongoDB aggregation to convert~ mongodb.
  3. In this article, we saw what are MongoDB aggregations, and how to apply them in Java using an example dataset. We used four samples to illustrate the various aggregation stages to form a basic understanding of the concept. There are umpteen possibilities for data analytics that this framework offers which can be explored further

MongoDB (abgeleitet vom engl.humongous, gigantisch) ist eine dokumentenorientierte NoSQL-Datenbank, die in der Programmiersprache C++ geschrieben ist. Da die Datenbank dokumentenorientiert ist, kann sie Sammlungen von JSON-ähnlichen Dokumenten verwalten.So können viele Anwendungen Daten auf natürlichere Weise modellieren, da die Daten zwar in komplexen Hierarchien verschachtelt werden. Aggregation Framework. The aggregation pipeline is a framework for data aggregation, modeled on the concept of data processing pipelines.. Prerequisites. The example below requires a restaurants collection in the test database. To create and populate the collection, follow the directions in github.. Include the following import statements

MongoDB - Aggregation - Tutorialspoin

  1. MongoDB Aggregation is a great solution when we talk about gathering metrics from MongoDB. Aggregation functions basically group the record from two or multiple documents and manipulate those grouped data in order to return a single combined result. If you are familiar with SQL then simply understand that count(*), group by, order by are similar to MongoDB aggregation. In this tutorial, we.
  2. - Spring Data MongoDB - Aggregation Grouping Example. Main Tutorials. Java 14; Java 13; Java 12; Java 11 (LTS) Java 8 (LTS) Java JDBC; Java JSON; Java XML; Spring Boot; Misc Tutorials; Advertisement. Spring Data MongoDB - Aggregation Grouping Example. By mkyong | Last updated: March 12, 2015. Viewed: 108,622 | +246 pv/w. In this tutorial, we will show you how to do the data grouping with.
  3. MongoDB Aggregate Query Group By. 0. Mongodb aggregate query count records for large dataset. 2. MongoDB - aggregation performance tuning. 0. MongoDB aggregate accounting info. Hot Network Questions Why do different 100% cpu loads cause different temperatures on the cpu? How did Cochrane obtain dilithium for the first warp flight? There are no open seats available for selected center - The.
  4. Make sure that the MongoDB Atlas cluster has been properly whitelisted so that your Go application can communicate to it. For information on installing the MongoDB Go driver and connecting to a cluster, check out my previous tutorial on the subject.. Leveraging the MongoDB Aggregation Framework in Golan
  5. MongoDB Aggregation after Find? 0. MongoDB - Aggregation on multiple distinct values. 0. MongoDB aggregate on multiple fields. Hot Network Questions Does burnt mark on cast iron crepe machine mean it's ruined? Why would spaceships still practice venting precious air?.
  6. MongoDB's aggregation framework is based on the concept of data processing pipelines. Aggregation pipeline is similar to the UNIX world pipelines. At the very beginning is the collection, the collection is sent through document by document, documents are piped through a processing pipeline, and they go through series of stages and then, we eventually get a result set. In the figure, you see.

MongoDB version 2.2 was released in late August and the biggest change it brought was the addition of the Aggregation Framework. Previously the aggregations.. MongoDB aggregation. The MongoDB database contains a mechanism called the MongoDB aggregation framework. It is working with the concepts of data processing pipelines. Documents enter a multi-stage pipeline that can transform them and output the aggregated result. Since there might be multiple stages, we pass an array to the aggregate function.

Aggregation Framework¶. This example shows how to use the aggregate() method to use the aggregation framework. We'll perform a simple aggregation to count the number of occurrences for each tag in the tags array, across the entire collection. To achieve this we need to pass in three operations to the pipeline Just want to do a MatchOperation on date in long format (date in seconds) in MongoDB MatchOperation matchDate = Aggregation.match(Criteria.where(datetime) .gte(fromDate).. MongoDB aggregation. The MongoDB database contains a mechanism called the MongoDB aggregation framework. It is working with the concepts of data processing pipelines. Documents enter a multi-stage pipeline that can transform them and output the aggregated result. Since there might be multiple stages, we pass an array to the aggregate function. For aggregation in MongoDB, use aggregate(). Let us create a collection with documents − Let us create a collection with documents − > db.demo199.insertOne(.

MongoDB and MySQL - Comparing Scalability, Data

MongoDB aggregate command The aggregate command does the aggregation operation using the aggregation pipeline. The aggregation pipeline allows the user to perform data processing from a record or other source using a stage-based application sequence To perform aggregation, pass a list of aggregation stages to the MongoCollection.aggregate () method. The Java driver provides the Aggregates helper class that contains builders for aggregation stages. In the following example, the aggregation pipelin This course will teach you how to perform data analysis using MongoDB's powerful Aggregation Framework. You'll begin this course by building a foundation of essential aggregation knowledge. By understanding these features of the Aggregation Framework you will learn how to ask complex questions of your data

Aggregation In MongoDB - C# Corne

The aggregation pipeline is used to process and aggregate data from collections. Using the aggregation pipeline, you can process multiple documents to return a computed result. While Mongo also supports map-reduce and single purpose aggregation methods, the aggregation pipeline is the preferred method for data aggregation in MongoDB MongoDB Aggregation with C#. Published by Guillaume on April 13, 2015. MongoDB is a very praticle and simple NoSQL database. It provides drivers in a lot of popular languages such as C, C++, C#, Java, Perl, PHP, Python, Scala and so on. MongoDB is a document-base database and well suited for Python or Javascrip applications. However, it is also of praticle interest for more typed languages and. During this session walk-through indexing and aggregation in MongoDB. Back to Basics Series Catch up on the rest of the series to learn the basics of MongoDB. Introduction to MongoDB; Building Your First Application with MongoDB Atlas; Schema Design Basics; Indexing & Aggregation; Scalability Through Replication and Sharding ; Try MongoDB Atlas, our fully-managed database as a service.

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MongoDB Aggregation Pipeline Operators for beginners and professionals with examples on CRUD, insert document, query document, update document, delete document, use database, projection etc Java Driver and Aggregation Framework ¶ Release 2.2.0 of MongoDB introduces the aggregation framework. Designed to be both performant and easy to use, the aggregation framework calculates aggregate values, (such as counts, totals and averages), without the need for complex map-reduce operations

Concept of Aggregation in MongoDB

db.collection.aggregate() — MongoDB Manua

Aggregation framework •Map / Reduce

MongoDB的一个很大的好处是能够使用MapReduce来吧数据库查询的结果简化成一个与原来的集合完全不同的结构。MapReduce把一个数据库查询的值映射为一个完全不同的形式,然后简化结果,使它们的可用性更好。 MongoDB有一个MapReduce框架,它也允许你使用聚合来简化吧一个MapReduce操作传输到另一个MapReduce. Introduction. MongoDB Compass Community provides users a quick and easy way to execute a MongoDB document aggregation. Aggregation in MongoDB Compass Community is a simple and easy, but sophisticated, program that provides users with multiple MongoDB Compass options, including how to analyze documents and visualize and explore schemas to understand the types, ranges and frequency of fields in. MongoDB is a NoSQL cross-platform document-oriented database. It is one of the most popular databases available. MongoDB is developed by MongoDB Inc. and is published as free and open-source software

Aggregation introduced by MongoDB has replaced one of its earlier features of Map/Reduce of MongoDB which was used until v2.2. In simple words, MongoDB Aggregation has replaced the MongoDB Map/Reduce feature from v2.2. Aggregation in its simplest sense is to perform operations on documents and compute the result out it. Aggregations are a set. mongodb documentation: MongoDB-Aggregation. MongoDB-Aggregation Verwandte Beispiele. Aggregierte Abfragebeispiele, die für Arbeit und Lernen nützlich sin

MongoDB can perform aggregation in 3 ways and they are as follows: Aggregation Pipeline; Map-Reduce Function; Single Purpose Aggregation Method; i. MongoDB Aggregation Pipeline. Aggregation process in MongoDB is modeled on the concept of data processing pipelines. Multiple documents enter the pipeline and then these documents are being. meteor documentation: MongoDB-Aggregation. Server Aggregation. Durchschnittliche Aggregationsabfragen in Meteor. Ist es möglich, eine echte Mongodb-Bibliothek für die Verwendung auf der * Server * -Seite nur in Meteor 0.6 zu packe

Aggregation Pipeline Stages — MongoDB Manua

This course will provide you with the knowledge to use MongoDB Aggregation Framework with confidence in your application development practices. Prerequisites: We highly recommend taking M001 or M220P or 3-6 months experience using MongoDB in application development. What You'll Build. You'll build an understanding about how to use MongoDB Aggregation Framework pipeline, document transformation. MongoDB aggregation pipeline support (preview) Unique index support; MongoDB wire protocol version 5 support, used in MongoDB 3.4 (preview) MongoDB aggregation pipeline. In MongoDB, the aggregation pipeline enables developers to create more sophisticated queries and manipulate data by combining multiple aggregation 'stages' together, thus enabling them to do more data processing on the. An Overview of Aggregation in MongoDB: Authentication in MongoDB was explained in detail in our previous tutorial in this Detailed MongoDB training series.. In this tutorial, we will learn about Aggregation in MongoDB. In simple words, aggregation means to combine different resource of information and provide the most authentic record In MongoDB aggregation pipeline, Datensatz flow von Bühne zu Bühne passiert, eine/batch zu einem Zeitpunkt (oder) wartet, um die aktuelle Phas

$project (aggregation) — MongoDB Manua

MongoDB MongoDB-Aggregation Aggregierte Abfragebeispiele, die für Arbeit und Lernen nützlich sind Aggregation wird verwendet, um komplexe Datensuchoperationen in der Mongo-Abfrage auszuführen, die bei normalen find -abfragen nicht möglich sind In this video I am going to show you How to use Aggregation in MongoDB . this we will do with the help of db.collection.aggregate() command in MongoDB. In this Tutorial we will learn. How to. We'll show you how to perform project aggregation in MongoDB and provide some examples to better understand how it works. Prerequisites. There are only a couple of prerequisites necessary for this tutorial on project aggregation in MongoDB: MongoDB needs to be installed and configured on your system. It's best to have some basic knowledge of MongoDB to follow along with the examples in. Refer to this official MongoDB Aggregation guide for more advance aggregation and group examples. 3. Exports Grouping Result to CSV or JSON. Often times, we need to export the grouping results in csv or JSON format. To solve it, inserts the group results in a new collection, and exports the new collection via mongoexport. 3.1 Set the group results in a variable. In this case, the variable name. The MongoDB, aggregation pipeline is a framework for data aggregation modeled on the concept of data processing pipelines. Documents enter as an input into multi-stage pipeline which transforms the documents into an aggregated results. The MongoDB aggregation pipeline consists various stages. Each stage transforms the documents passes through the pipeline. In this stage it is not needed to.

$unwind (aggregation) — MongoDB Manua

Aggregation works mainly to group the data of multiple documents and perform various operations on the grouped data and returns a single or multiple results. Types of aggregate functions MongoDB performs aggregate operations in one of the following three ways. Single-purpose aggregate methods and commands. Pipeline. Map Reduc mongodb - optimizations - mongoose aggregate Aggregate $ lookup Die Gesamtgröße der Dokumente in der übereinstimmenden Pipeline überschreitet die maximale Dokumentgröße (1

In this MongoDB tutorial, we will show you a nearly complete example of calculates aggregate values for the data in a collection or a view using MongoDB Aggregate function or method. MongoDB aggregation operators were similar to SQL query terms, function, and concepts. Here, we want to show you an example of comparation with SQL queries. If you are getting used to SQL queries, you will see the. MongoDB Introduce a big change in 2.2 release named Aggregation Framework.Before Aggregation framework MongoDB used Map/Reduce for such type of operations.So Aggregation is an alternative of Map/Reduce. So what is Aggregation :- In one liner we can say Aggregation performs operations on documents and provide the computed result. Backgroun

MongoDB 聚合 菜鸟教

  1. Aggregate method. This method is used to perform aggregation operations using following command - >db.COLLECTION_NAME.aggregate(AGGREGATE_OPERATION) Pipeline concept in MongoDB. Pipeline concept works in using the output of one process as the input of the next process. This concept can be applied in MongoDB framework using following commands
  2. When it's time to gather the metrics from MongoDB, there is no better solution than MongoDB aggregations. Aggregations are the set of functions that allow you to manipulate the data being returned from a MongoDB query. Aggregations operations can process the data records and return the computed results
  3. MongoDB Database Big Data Analytics To implement aggregation with multiple keys, use aggregate () along with $group. Let us create a collection with documents − > db.demo190.insertOne(..
  4. ing
  5. I started with a working Aggregation query from the shell, and then took that and implemented using the MongoDB Java api. The challenge with this query is that there doesn't seem to be any out of..
  6. Get All MongoDB Processes in a Group; Get MongoDB Process by ID; Get Measurements for a MongoDB Process; Get Available Databases for a MongoDB Process; Get Measurements of a Database for a MongoDB Process; Get Available Disks for a MongoDB Process; Get Measurements of a Disk for a MongoDB Process; Logs; Performance Advisor. Get All Namespaces.
  7. MongoDB Driver 3.9 Documentation. The following guide provides information on using the synchronous MongoDB Java Driver 3.9. What's New in 3.9. The What's New guide explains the major new features of the driver. If you are upgrading from the 2.x series of the driver, consult the Upgrading documentation for information on breaking changes

A MongoDB Aggregation Example with $match, $group & $sor

In the previous post we looked at how to build an aggregation pipeline in the MongoDb.NET driver using loosely typed BsonDocument objects and the AppendStage function. AppendStage can accept any type of aggregation stage and each stage is described with plain strings Data aggregations are very helpful whenever you need to create metrics or get more insights from the data. Furthermore, joining multiple MongoDb collections may provide more meaningful results. This article will be a light intro on how to do run these on MongoDb using .NET Driver and LINQ. Notes before starting This article is the 3rd article, continuing Part 1: How to search good places to. MongoDBでAggregation=集計を行う方法は3つあります。. Aggregation Pipeline; map-reduce function; single purpose aggregation method; 今回はこのうちのAggregation Pipeline(以下、pipeline)を使ってみました。 pipelineがMongoDBで集計を行う上では好ましい方法であるとされています Video created by MongoDB Inc. for the course MongoDB Aggregation Framework. In this module you'll learn the fundamentals of MongoDB's Aggregation Framework. This will cover basics like filtering and sorting, as well as how to transform array. The MongoDB Driver is built on top of a new Core library which anyone can use to build alternative or experimental high-level APIs. BSON Library A standalone BSON library, with a serialization infrastructure that you can use to build high-performance serializers. Quick Start. The recommended way to get started using one of the drivers in your project is with a dependency management system.

Aggregation in MongoDB MongoDB Tutorial Studytonigh

By using the Azure Cosmos DB's API for MongoDB, you can enjoy the benefits of the MongoDB you're used to, with all of the enterprise capabilities that Cosmos DB provides: global distribution, automatic sharding, availability and latency guarantees, automatic indexing of every field, encryption at rest, backups, and much more MongoDB Aggregation Framework Bogdan Stashchuk; 45 videos; 192,541 views; Last updated on Jun 3, 2018; Play all Share. Loading... Save. Sign in to YouTube. Sign in. 01 Introduction to the. MongoDB showdown: Aggregate vs map-reduce. By Luca Marturana on March 12, 2015. NEW!! LIVE WEBINAR: Deploy Faster by Automating Container Security, Monitoring & Compliance - August 6, 2020 10am Pacific / 1pm Eastern . Register Now . MongoDB is widely regarded as the leading NoSQL database technology. Developers love it because MongoDB is schema-less and it helps them build applications much.

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MongoDB $project Example MongoDB Aggregation Pipelin

Mongodb Erklären für Aggregation Framework (2) MongoDB 3.4 hat beispielsweise viele neue Aggregationsstufen und Ausdrücke hinzugefügt, einschließlich der Unterstützung für die Arbeit mit Arrays, Strings und Facetten. Es gibt auch eine Reihe von Aggregationspipeline-Optimierungen, die abhängig von Ihrer MongoDB-Serverversion automatisch ausgeführt werden. Zum Beispiel können. MongoDB{Aggregation $ Match} vs{find} Geschwindigkeit (2) . Der Hauptzweck des aggregation framework besteht darin, die Abfrage einer großen Anzahl von Einträgen zu vereinfachen und eine geringe Anzahl von Ergebnissen zu generieren, die für Sie von Wert sind 45 videos Play all MongoDB Aggregation Framework Bogdan Stashchuk; SQL vs NoSQL or MySQL vs MongoDB - Duration: 21:30. Academind 1,223,680 views. 21:30. Example. A simple C# script to demo MongoDB aggregation performing group by count. - groupby_count_aggregation.cs. Skip to content. All gists Back to GitHub. Sign in Sign up Instantly share code, notes, and snippets. sindbach / groupby_count_aggregation.cs. Created Mar 30, 2016. Star 4 Fork 0; Code Revisions 1 Stars 4. Embed. What would you like to do? Embed Embed this gist in your website. Share Copy.

MongoDB $lookup Example MongoDB Aggregation Pipelin

The Mongo Aggregation Debugger helps you understand what is going on by either: outputting in the console the results of each stage of the aggregation pipeline returning an array of results of each stage of teh aggregation pipeline for programmatic us In this video I dicuss perfroming calculations in the MongoDB aggregation pipeline as well as how to create new fields for said aggregations MongoDB is a very popular NoSQL solution and the camel-mongodb component integrates Camel with MongoDB allowing you to interact with MongoDB collections both as a producer (performing operations on the collection) and as a consumer (consuming documents from a MongoDB collection) Folgenden werden return Anzahl der uniqueUsers pro Anwendung. Gilt dies für eine Gruppe-operation, die zu einem Ergebnis von einer Gruppe Betrieb durch die Verwendung von pipeline-Funktion von mongodb

How to Perform $count Aggregation in MongoDB ObjectRocke

Mongo Management Studio is the best way to work with MongoDB the easy way. Because of the clean and light user interface, you can execute the typical MongoDB commands fast and effective, without using the MongoDB shell. It is suitable to assists your local development and test process as well as working with your Mongo databases on remote or production servers. By using a basic but strict user. When MongoDB v2.2 was released, this performant method of data aggregation was introduced that utilizes stages to filter data and perform operations like grouping, sorting and transforming the output of each operator. This framework is an alternative to Mongo's MapReduce functionality, and the output can be piped to a new collection or used to update specific documents MongoDB provides an Aggregation Framework that includes utility functions such as count, distinct and group. However more advanced aggregation functions such as sum, average, max, min, variance. Azure Cosmos DB-API für MongoDB (Version 3.2): unterstützte Features und Syntax Azure Cosmos DB's API for MongoDB (3.2 version): supported features and syntax. 10/16/2019; 6 Minuten Lesedauer; In diesem Artikel. Azure Cosmos DB ist ein global verteilter Datenbankdienst von Microsoft mit mehreren Modellen

How Financial Services Organizations Use MongoDBMapping Relational Databases and SQL to MongoDB

Die Aggregation Pipeline wird verwendet um Daten aus Collections zu verarbeiten und zu einem berechneten Ergebnis zu verarbeiten. MongoDB unterstützt auch Map-Reduce, sowie Single Purpose Aggregations (z.B. count). Die präferierte Methode für Aggregationen ist aber Aggregation Pipeline Read here for information and announcements from the MongoDB community team. You will also find a Welcome thread for new members in this category. 2. Working with Data. Discussions about queries, aggregation, indexes, performance, data modeling, schema validation, change streams, and transactions. 471. Drivers & ODMs . Discussions about developing with MongoDB using various programming. Matching ObjectId to String für $ graphLookup (1) . Ich versuche, ein $graphLookup wie im $graphLookup gezeigt: Ziel ist es, bei einem bestimmten Datensatz (dort. MongoDB datasource for Grafana Features. Allows MongoDB to be used as a data source for Grafana by providing a proxy to convert the Grafana Data source API into MongoDB aggregation queries. Requirement MongoDB Aggregation & Gruppierungsproblem in MeteorJS . meteor aggregate (1) Wie verwendest du Meteor Aggregate mit MongoDB in Meteor JS richtig? Das beabsichtigte Ergebnis besteht darin, gruppierte Benutzer nach ihrer userId zurückzugeben und ein boolesches Feld namens progressState (true / false) zusammenzufassen. Zum Beispiel kann das Dokument haben: user 001-true user 001-false user 001.

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