Tuesday, September 26, 2023

How do I perform an IF...THEN in an SQL SELECT?

 Hey there! Today, I'm going to take you on a journey through the fascinating world of SQL, and we're going to dive headfirst into the intriguing realm of the IF...THEN statement within an SQL SELECT query. Don't fret; it's not as complicated as it sounds. So, grab your favorite coding beverage, settle in, and let's unravel this SQL mystery together.

How to import an SQL file using the command line in MySQL?

 Hey there! Today, I want to take you on a journey through the world of MySQL and show you how to import an SQL file using the good old command line. It might sound intimidating, but I promise it's not rocket science. So, grab your favorite beverage, fire up your terminal, and let's dive right in.

Monday, September 25, 2023

How do I UPDATE from a SELECT in SQL Server?

 Hey there! Today, I want to dive into a handy SQL Server trick that has saved me time and effort countless times: updating data in one table based on the results of a SELECT query. It's a bit like magic, and I'm here to share the spell with you. So, grab your wizard hat, and let's get started!

Thursday, September 21, 2023

How to add/remove and modify column in a table?

 Hey there! Today, I'm going to share some DB wizardry that's incredibly handy in your SQL adventures: how to add, remove, and modify columns in a database table. Whether you're a seasoned data sorcerer or just starting your magical journey, this article has something for everyone.

Wednesday, September 20, 2023

10 Examples of Creating index in SQL

 Hey! Today, I'm thrilled to dive deep into the world of SQL indexing, where a well-placed index can supercharge your database queries. Think of indexing as creating a map that helps SQL quickly find the treasures (data) you seek. In this article, I'll guide you through ten real-world scenarios where indexing becomes your trusty sidekick.

10 Examples of JOIN Clause in SQL

 Hey! Ready to embark on an exciting journey through the world of SQL JOIN? I'm here to guide you through ten real-world scenarios where the JOIN clause becomes your trusty sidekick, helping you merge data from different tables effortlessly.

Monday, September 18, 2023

Difference between JOIN and SUBQUERY in SQL

 Hey there! Ever found yourself at the crossroads of JOIN and SUBQUERY, wondering which path to take in your database adventures? Well, you're not alone! Today, I'm here to help you decipher the intriguing differences between these SQL techniques.

Difference between ISNULL and COALESCE in SQL Server

Hey there! Today, I'm diving deep into the fascinating world of SQL Server to unravel the mysteries of two essential functions: ISNULL and COALESCE. You've probably encountered these in your SQL adventures, but do you know when to use one over the other? Join me as I break it down.

Top 10 MySQL functions Every programmer should learn

 Hey! If you're venturing into the realm of MySQL, you're in for a treat. MySQL functions are like the secret spells in a wizard's grimoire, capable of transforming your code into pure magic. In this article, I'll be your magical guide as we explore the top 10 MySQL functions that every programmer should learn. So, grab your enchanted staff, and let's conjure some MySQL wizardry together!

Sunday, September 17, 2023

Difference between CHAR and VARCHAR in SQL

Hey, folks! Today, we're diving into the fascinating world of SQL data types, specifically, the showdown between CHAR and VARCHAR. It's a bit like choosing between a sturdy old book (CHAR) and a flexible e-reader (VARCHAR). So, grab your virtual coffee, and let's unravel the mystery behind these two SQL heavyweights.

Top 10 PL/SQL Functions Every Programmer should Learn

 Hey there! If you're diving into the world of Oracle databases and PL/SQL, you're in for a treat. PL/SQL functions are like the secret spices in a recipe; they can transform your code and supercharge your applications. In this article, I'm excited to share my top 10 PL/SQL functions that every programmer should learn. So, grab your coding apron, and let's spice up our PL/SQL dishes together!

Top 10 SQL Server Functions Programmer should learn

 Hey there! SQL Server functions are like magic spells in the enchanted forest of databases. They can transform your data and make it dance to your tune. In this article, I'm going to share my top 10 SQL Server functions that every programmer should have in their toolkit.

How to use rank, row_number, and dense_rank in SQL? Example

 Hey folks, ever found yourself at a data party, trying to figure out the pecking order? Well, I've been there too, and SQL has some nifty moves to help you out. Today, I'm going to show you how to use RANK, ROW_NUMBER, and DENSE_RANK in SQL to sort and analyze your data like a pro.

Tuesday, September 12, 2023

10 SQL commands every Programmer should learn

Hey there! If you're diving into the world of databases, SQL (Structured Query Language) is your golden ticket to handle and manipulate data. It's like learning the secret handshake to the programming club. In this article, I'll share the top 10 SQL commands that every programmer should have in their toolbox.

10 Ways to use GROUP BY command in SQL With Examples

Hey there! If you've ever waded into the wonderful world of SQL, you'll know it's a bit like orchestrating a symphony of data. And one of the most beautiful instruments in this orchestra is the GROUP BY command. So, let's take a stroll down memory lane (or should I say data lane?) as I share the ten fantastic ways I fell in love with GROUP BY.

Monday, September 11, 2023

10 ways to use SELECT command in SQL With Examples

Hey there! If you've ever danced with databases, you're no stranger to the SELECT command in SQL. It's like the DJ at a data party, spinning records and giving you the tunes you need. But did you know there are more ways to groove with SELECT than you might think? Let's dive into the top 10 ways to make SELECT your SQL superstar.

Friday, January 27, 2023

5 Ways to find the Second Highest Salary of Employee in SQL [Solved]

 Hello guys, if you have attended programming or software development interview then you may have come across SQL queries. In the past, I have shared popular SQL queries from interviews and one of them is how to find the 2nd highest salary of employee in SQL. This is probably the most popular SQL query question I have come across in my career and I have seen it many times. When I first come across this one I have hard time to solve it but over the years, I have learned several ways to solve this problem and find the 2nd highest or even 3rd highest salary in SQL. Earlier, I have shared how to find Nth highest salary and in this article, I am going to share 5 different ways to find the second highest salary in SQL.