Introduction Elasticsearch aggregations allow you to compute averages, sums, maximums, and minimums. It also let’s you create histograms from your data. Let’s start with what a histogram is in case you’ve forgotten. A histogram is a bar graph that tells you how many there are of each given type. For example, if you had a … Continued
Introduction Aggregation is a very powerful functionality in Elasticsearch. In this article we’ll be showing you how to use aggregations to find the minimum value for a field in a dataset. Aggregations can do many things like histograms, sums, or averages but finding the min and max are a good way to get your feet … Continued
Introduction Aggregation is a very powerful functionality in Elasticsearch. In this article we’ll be showing you how to use aggregations with NodeJS to find the maximum value for a field in a dataset. Aggregations can do many things like histograms, sums, or averages but finding the max and min are a good way to get … Continued
Introduction If you’re running a NodeJS application with Elasticsearch it won’t be long before you’ll need to compute the average of field in your dataset. Computing the average of a field is a common practice when using Elasticsearch. You might need to compute the average user rating of a song, movie, or product. Averages are … Continued
Introduction If you’re interacting with Elasticsearch through a NodeJS application, you’ll probably need to update a document at some point. It’s one of the most common tasks in database management– a user may update their address or credit card information, or the price of a product may need to be changed. Regardless of the situation, … Continued
Introduction If you’re running a NodeJS application with Elasticsearch, you’re getting the best of both words: the efficiency of NodeJS and the powerful search functionality of Elasticsearch. To make the most of this search functionality, it’s important to know how to query Elasticsearch. In this tutorial, we’ll provide step-by-step instructions that show how to query … Continued
Introduction If you’re interacting with Elasticsearch using a NodeJS application, there may be occasions when you need to delete a specific document. Fortunately, it’s easy to use the npm Elasticsearch module to communicate with Elasticsearch and issue this command. In this tutorial, we’ll learn how to delete a document by id in Elasticsearch using NodeJS. … Continued
Introduction There are times when you may want to analyze a dataset to find the number of distinct values for that set. For example, you may want to count the number of unique visitors to a website or the number of unique customers a business had in the past month. Regardless of the exact purpose, … Continued
Introduction When you’re determining the average for values in a dataset, sometimes it doesn’t make sense to treat all the values equally. For example, if you’re calculating student grades, doing inventory cost accounting, or computing average bond yields, it’s helpful to assign a relative importance to each value in your dataset. That’s where a weighted … Continued
Introduction Elasticsearch is very compatible with popular applications that run on the backend. NodeJS for example, is one such application that when combined with Elasticsearch, you’re likely to expand your productivity. Because NodeJS is fast, your efficiency increases when you use Elasticsearch with it to run Javascript on the server-side and then let it run … Continued
