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SQL SELECT Statement Example

1. Introduction In this article, we will look at one of the most used clauses used in SQL known as SELECT. 1.1 What is SQL? In 1974, Donald Chamberlin and Robert Boyce designed a programming language called SQL or “sequel”. It is based on relational algebra and tuple-relational calculus. So, this is the programming language for designing and maintaining a ...

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How Amazon CloudWatch Works

Welcome, in this tutorial, we will understand AWS CloudWatch and its related terminology. But remember this is going to be a complete theoretical article with no downloadable content. 1. Introduction to AWS CloudWatch Amazon CloudWatch is a monitoring tool for AWS resources. It displays the metrics and raises alarms on email or mobile push notification if the metric threshold for ...

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SQL Server Convert function Example

This example will explain the SQL Server Convert function with its syntax and a proper example. SQL Server is relational database management (RDBMS). Microsoft has developed the SQL Server. Many of the Database Management Systems use SQL, and SQL Server is not different. 1. Pre-requisites To run this example, you should have SQL Server downloaded and installed on your local ...

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SQL LIMIT Clause Example

1. Introduction   In this article, we will look at how to use the SQL LIMIT clause using various examples using MySQL RDBMS. 1.1 What is SQL? SQL is also called “sequel” and it stands for Structured Query Language. SQL first appeared in 1974 and Donald Chamberlin and Robert Boyce designed it. It is based upon relational algebra and tuple-relational ...

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Spring Batch Metadata Table on Different Schema of the Same DB

In this article, we will explain how to use a Spring Batch metadata table on the different schema of the same DB. 1. Spring Batch Metadata Table on Different Schema of the Same DB This is an in-depth article related to the Spring Batch. Spring Batch Framework is an open-source library for batch processing. Batch Processing is the execution of ...

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Spring Boot and SNS mobile notification Example

Welcome, in this tutorial, we will understand send a mobile notification through the Amazon Simple Notification Service (AWS SNS) in a spring boot application. 1. Introduction Before going further in this tutorial we will take a look at the common terminology such as introduction to Spring Boot, Lombok, and Amazon SQS. 1.1 Spring Boot Spring boot is a module that ...

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Spring Boot MockMVC Tutorial

In this article, we provide a tutorial about Spring Boot MockMVC. 1. Introduction As a software developer, you need to validate that your code is working correctly. You accomplish this by testing. There are different types of tests: Unit tests target a specific section of code, such as a methodIntegration tests verify that the interactions between your code and other ...

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Spring Boot and SNS email Example

In this tutorial, we will explain how to send an email or notification through the AWS SNS (Amazon Simple Notification Service) in a spring boot application. 1. Introduction Before going further in this tutorial we will take a look at the common terminology such as introduction to Spring Boot, Lombok, and Amazon SQS. 1.1 Spring Boot Spring boot is a ...

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Spring Boot Server Events with SseEmitter Tutorial

Welcome, in this tutorial, we will explain the server events with SseEmitter in a spring boot application. In this approach, we will use the SseEmitter where the service returns a SseEmitter events to the client. 1. Introduction Before going further in this tutorial, we will look at the common terminology such as introduction to Spring Boot, Lombok, and Server-Sent Events ...

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Java 12 Garbage Collector Example

The LISP language had the first garbage collector back in 1959. Since then many languages like Java have adopted Garbage collection for automatic memory management. Today we will look at the Shenandoah garbage collector. 1. Introduction Garbage Collection is Java’s automatic memory management method. Garbage Collection occurs in the Java Heap memory whenever the Java heap memory is full. There ...

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