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Java 8 Stream – min() & max() Tutorial

Hello. In this tutorial, we will explain the min() and max() methods introduced in java 8. 1. Introduction Before diving deep into the practice stuff let us understand the min() and max() methods introduced in java8 programming. Stream.min() – Returns the minimum element of the stream according to the provided comparator. Represented by the code syntax – Optional<T> min(Comparator<? super ...

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SQL is null – SQL is not null

In this article, we’re going to see how to test null values in an SQL database. 1. What is a NULL Value? Basically, a field with a NULL value in a SQL table is a field without value. When creating a table, we can mark a column that accepts null values when inserting data into the table. A null value ...

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Java 8 Functional Interface – Consumer Example

Hello. In this tutorial, we will explain the Consumer functional interface in java 8. 1. Introduction Before diving deep into the practice stuff let us understand the Consumer functional interface in java programming. The interface: Contains the abstract accept() method and default andThen() method which can be used as an assignment for a lambda expression or method referenceAccepts a single ...

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Uploading files to AWS S3 using Node.js

Hello. In this article, we will exaplain how to upload files to AWS S3 using Node.js. The node.js framework is commonly used to create server-based applications which are further used to show the contents to the users. We will create an endpoint to upload the file on the AWS S3 bucket. 1. Introduction AWS Simple storage service is used to ...

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SQL UNION Operator

In this article, we will explain the SQL UNION Operator through examples. You can also check this tutorial in the following video: SQL Union Operator Tutorial – video 1. Introduction SQL UNION operator combines results from two select statements into a single result which includes all unique rows. UNION ALL includes duplicated rows in the combined result. The syntax is ...

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SQL Server Versions

In this article, we’re going to see several Microsoft SQL Server versions and editions and how to identify them. 1. Introduction On MSSQL Server we need to determine the version and edition to troubleshoot some issues or to know if feature support is available. To do that, MSSQL Server introduces some procedures to identify the version and edition which we’re ...

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Apache Solr Geospatial Search Example

This is an article related to the Apache Solr GeoSpatial Search. Generally, Apache Solr is used for search and browsing categories and facets. Solr can be used to sort the documents by distance from geolocation. 1. Introduction Apache Solr is an open-source software java search engine. It is scalable and can process a high volume of data. It is used ...

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SQL Count Function

In this article, we will discuss the COUNT function in SQL, different ways of using it, and how to combine it with other keywords like GROUP BY and HAVING. 1. Introduction Many times, the information we want from a database table is not available in a single row but in a group of rows or in the result of a ...

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SQL Tutorial for Beginners

This is an SQL tutorial for beginners. We will discuss what is SQL and what it is used for. You can also check this tutorial in the following video: SQL Tutorial for Beginners – video 1. Why to Learn SQL SQL stands for Structured Query Language and is a standard language for accessing and manipulating databases. Although SQL is an ...

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SQL Server 2019: Overview and Installation

1. Introduction In this tutorial, we will see some new and key features of SQL Server 2019 and we will write a small example to help you get started. 2. What’s new in SQL Server 2019 2.1 Intelligent Query Processing Enhancements This is a set of enhancements that improves Query Optimizer. Query Optimizer is a component inside SQL Server that ...

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