Sql Tips

Kateryna Koidan

SQL Beginners: Questions to Ask Before Writing a Query

SQL is known for its easy-to-follow syntax that even beginners can understand pretty quickly. Still, to write your own SQL queries, you need to know the basics. Let’s explore what things need to be considered before writing a SQL query. If you are looking for a career in data analysis or just want to work effectively and independently with data in any analytical position, you’ll need to master SQL. Luckily, this programming language is beginner-friendly and can be learned just in a few months with the right learning sources.

Marija Ilic

7 Common GROUP BY Errors

Are you making these errors with GROUP BY in SQL? Find out what they are, how to avoid them, and how to fix them. SQL’s GROUP BY statement can quickly uncover powerful data insights. At first, using GROUP BY can seem easy – e.g. when creating basic SQL reports that you’ll present to business decision-makers. But while learning this powerful feature, you could become trapped in weird errors or get incorrect results caused by improperly written GROUP BY statements.

Francisco Claria

Preventing Common SQL Mistakes

Regardless of the engine you are using (SQL Server, MySQL, Oracle, etc.), you can prevent common errors and simplify the debugging process. This article will discuss some of the common SQL mistakes you’ll face and will help you correct them easily. One of the best ways to prevent the most common SQL mistakes is to keep your queries clear and readable. It’s very easy to forget the ideas behind your code!

Adrian Dembek

6 Common SQL Syntax Mistakes All Learners Make

We all make mistakes when learning a new language – especially at the beginning. New words, complicated grammar... Everyone needs time to master a language. But when we get immediate feedback, we can progress more quickly. The same goes for learning SQL. In this article, we'll look at 6 common SQL syntax mistakes most SQL learners make. Learning SQL can feel like deciphering a complex code, especially when you’re just starting out.

Marcos Pierri

8 Tips Absolute Beginners Can Use to Fix SQL Queries

Code errors are common – and frustrating. And when you're just learning SQL, it can be very challenging to find and fix your mistakes. In this post, we'll show you eight ways to solve or eliminate common SQL coding errors. Today, we'll talk about some tips the SQL beginner can use to avoid several common errors. These tips work in any database environment. As we go along, we'll be showing some error messages.

Aldo Zelen

SQL Errors: Five Common SQL Mistakes

As you learn SQL, watch out for these common coding mistakes You’ve written some SQL code and you’re ready to query your database. You input the code and …. no data is returned. Instead, you get an error message. Don’t despair! Coding errors are common in any programming language, and SQL is no exception. In this article, we’ll discuss five common mistakes people make when writing SQL. The best way to prevent mistakes in SQL is practice.

Aldo Zelen

Five Common SQL Syntax Errors

SQL is a powerful language for managing databases, but even small syntax errors can lead to big headaches. As you work with SQL, understanding and avoiding common mistakes can save you time and frustration. In this article, we'll highlight five frequent SQL syntax errors You've written your SQL code and you're ready to query your database. You input the code, but instead of getting the data you expected, you get an error message.

Adrian Więch

5 Tips to Optimize Your SQL Queries

The SQL Language seems easy to learn – the commands follow a simple syntax and don't describe the specific algorithms used to retrieve data. The simplicity might, however, be deceptive. Not all the database functions operate with the same efficiency. Two very similar queries can vary significantly in terms of the computation time. This article presents some of the best practices that can greatly boost your SQL queries. 1. Learn How to Create Indexes Properly Learning how to index properly is the best thing you can do to improve the performance of your SQL queries.