23 Jan 2025 Maria Durkin Charting with SQL: A Guide For Beginners SQL, often known as Structured Query Language, is a valuable tool for data analysts. It enables you to query, update, and organize your data. This is a critical precondition for making charts. In this article, we’ll explore how to prepare data with SQL for use in data visualizations. Raw data is only valuable if you know how to clean and organize it. Thus, properly preparing data for charts is an important step in making captivating and informative graphs. Read more 4 Dec 2024 Maria Durkin SQL Exercises for Northwind Database When it comes to learning SQL, many beginners struggle to gain practical experience that can eventually translate to real-world scenarios. We'll tackle this challenge by presenting Northwind database SQL exercises with solutions and explanations. In this article, we’ll cover 16 Northwind exercises taken from our SQL practice course Basic SQL Practice: A Store. As you might have guessed, the course uses Microsoft’s classic Northwind database. It’s a small trading company database that’s designed to give SQL learners some practical experience. Read more 7 Nov 2024 Maria Durkin SQL Pivot Tables: A Step-by-Step Tutorial Are you a data analyst looking to better your abilities? Or perhaps you want to discover what tools you need to succeed in this role? Today, we're going to look at one of the most important tools for data analysts: the SQL pivot table. An SQL pivot table is an essential tool for quickly arranging and summarizing data. In just a few lines of code, it helps analysts rapidly and effectively identify patterns and trends in data. Read more 9 Jul 2024 Maria Durkin SQL vs. MySQL: What’s the Difference? Are SQL and MySQL the same thing? In this beginner-friendly guide, we'll explain the ddifferences of SQL and MySQL – and how they fit into the larger picture of relational database management systems. When you’re getting started with databases, it’s easy to feel overwhelmed by the terminology. SQL, MySQL, other acronyms… It can be a lot. And sometimes – like SQL and MySQL – the terminology can seem more similar than different. Read more 4 Jun 2024 Maria Durkin The SQL BETWEEN Operator SQL comparison operators are essential tools for filtering data in database queries. Among these operators, the BETWEEN operator stands out as an important tool for specifying ranges inside datasets. SQL comparison operators, such as BETWEEN, are useful for filtering data in database queries. The BETWEEN operator allows you to select rows within a given range, making it ideal for tasks like segmenting an audience by age ranges, identifying thresholds for items between certain quantities, or categorizing performance based on exam scores. Read more 2 May 2024 Maria Durkin The Data Analysis Lifecycle: From Dataset to Presentation In today's fast-paced decision-making climate, data is an invaluable resource. Raw data is like a rough diamond: it has great potential, but it must be processed to reveal its true brilliance. Achieving this brilliance is where the data analysis lifecycle comes in. The data analysis lifecycle maps out a structured journey of five steps: Collection Cleaning Analysis Interpretation Presentation Mastering the right tools for each step is key, and that's where SQL proves indispensable. Read more 16 Apr 2024 Maria Durkin 25 SQL Interview Questions for Data Analysts You have an upcoming interview for a data analyst position and SQL is one of the skills that will be tested. Well, these SQL questions for data analysts are specifically tailored for you! SQL is a must-have skill in every data analyst's toolkit. It simplifies data extraction and manipulation, allowing analysts to convert raw data into actionable insights. It enables analysts to perform ad hoc analyses, accelerating organizational decision-making processes. Read more 2 Apr 2024 Maria Durkin Building a Data Analyst Portfolio: All You Need to Know In a competitive job market, it is not enough to simply have the necessary skills; you must also demonstrate them. This is where a well-crafted data analyst portfolio comes into play. In data analytics, a portfolio is more than just a collection of projects; it serves as proof of an analyst's abilities and is critical to standing out. It demonstrates concrete capabilities in data cleaning, analysis, and visualization as well as the ability to effectively communicate insights. Read more 5 Mar 2024 Maria Durkin What Is CROSS JOIN in SQL? What is a CROSS JOIN in SQL, and when should you use it? We answer those questions – and give you some examples of CROSS JOIN you can practice for yourself – in this article. CROSS JOINs, a type of SQL JOIN, create all possible row combinations from two tables. If you're new to JOINs and want to learn more, check out our comprehensive SQL JOINs course, which includes over 90 hands-on exercises on various JOIN types. Read more 15 Feb 2024 Maria Durkin SQL HAVING Clause: A Tutorial for Beginners So, you're new to SQL and have just stumbled upon the HAVING clause. But what does it do? Why is it essential? In this article, we'll delve into the basics of the HAVING clause in SQL. And we’ll walk through practical exercises to enhance your understanding of its functionality. Let's start by defining Structured Query Language (SQL). SQL is a powerful and standardized programming language designed specifically for managing and manipulating relational databases; simply put, it is how we communicate with the databases that hold all of our important data. Read more «« « 1 2 3 4 » »»