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SQL INNER JOIN Keyword

In this article, we will look into SQL Inner Joins through examples. 1. Introduction SQL stands for Structured Query Language. It is a standard language for storing, manipulating, and retrieving data in databases. 2. SQL Join A JOIN clause is used to combine rows from two or more tables, based on a related column between them. There are four types ...

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Java 8 Functional Interface – BiConsumer Example

Hello. In this tutorial, we will explain the BiConsumer functional interface introduced in java 8. 1. Introduction Before diving deep into the practice stuff let us understand the BiConsumer functional interface in java8 programming. void accept(T t, U u) – It is an abstract method that accepts two input arguments, prints the operation based on the given input, and returns ...

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Implementing Microservices on AWS

1. Introduction This is an in-depth article related to the Microservices on AWS Cloud using spring framework components. Spring Framework helps in creating stand-alone and production-ready applications. Spring Framework features are Spring MVC, JPA, Spring Boot, Micro Containers, and Messaging. It is an open-source software framework used by developers for creating web applications and services. Developers use Java technology stack ...

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Java 8 Stream – count() Example

Hello. In this tutorial, we will explain the count() method introduced in java 8. 1. Introduction Before diving deep into the practice stuff let us understand the count() method introduced in java8 programming. Stream.count() – Returns the number of elements in the stream with or without filter condition being appliedThis is a terminal operation and once consumed the same stream ...

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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. 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 as the following: SELECT_QUERY_1 UNION [ALL] SELECT_QUERY_2 Note, the two SELECT queries must meet the following ...

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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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