Use case of OFFSET clause

Getting started with SQL LIMIT clause

January 13, 2023 by

Today, I am going to explain how to use the SQL LIMIT clause to limit output values. We all know RDBMS systems are one of the popular ways to store, protect, access, and analyze data in a structured way. We can store enormous sizes of data and then further can access them with the help […]

We need to use IS NULL or IS NOT NULL syntax when we compare the NULL values in a table

5 Best Practices for writing SQL queries

December 30, 2022 by

In this article, we are going to learn some best practices that help to write more efficient SQL queries. Introduction Queries are used to communicate with the databases and perform the database operations. Such as, we use the queries to update data on a database or retrieve data from the database. Because of these functions […]

Difference between SQL and MySQL

Understanding the difference between SQL and MySQL

December 26, 2022 by

This article will explain the difference between SQL and MySQL. Many people get confused between several database terms like SQL, MySQL, SQL Server, or other SQL-related phrases. If you are a database professional, then you should be aware of the difference between SQL and MySQL or other phrases which have SQL words included like PostgreSQL, […]

Restore database

Use of the RESTORE FILELISTONLY command in SQL Server

December 21, 2022 by

This article explores the RESTORE FILELISTONLY command in SQL Server with examples. Introduction Performing a database backup is an integral part of a DBA’s job. Backups are taken to ensure that data can be recovered in an emergency. There are different restore mechanisms, and the SQL Server DBA needs to understand them to make the […]

Use SUM with other system functions and GROUP BY statement

Understanding the SQL SUM() function and its use cases

December 13, 2022 by

Today, I will describe the SQL SUM () function along with its use cases in this article. There are various mathematical calculations we need to do in day-to-day business requirements. SQL Server offers various system functions which I have listed below to get these mathematical calculations easily by using them. One such requirement is to […]

Subquery example of Student table and ExamType table before we talk about correlated subquery example

Why do we need Correlated Subqueries in SQL

December 9, 2022 by

This article speaks about correlated subquery and why we need it when querying a SQL database. Additionally, we are going to understand the difference between simple subqueries and correlated subqueries with the help of some easily understandable examples.

sql boolean in sql query

SQL Boolean Tutorial

November 28, 2022 by

The SQL Boolean data type is not included in SQL Server. Other databases like Oracle and MySQL include the Boolean data type that accepts the values of TRUE, and FALSE.

Get age in SQL Server based on bithdate

SQL Subtract dates

November 7, 2022 by

In this article, we will show how to subtract dates using SQL Server. This article will be a learn-by-example article with a problem and a solution. But first, I will add some theory to understand the syntax of the DATEDIFF function which is the base of this article.