30 Nov 2023 SQL for Data Analysis: 15 Practical Exercises with Solutions Are you new to the world of SQL and eager to unlock the power of data analysis?. In this article, we'll improve our SQL skills through 15 practical, hands-on exercises designed specifically for beginners. Because when it comes to SQL, practice truly makes perfect! We’re going to shine a spotlight on the critical domain of data analysis, where SQL takes center stage. SQL, or Structured Query Language, plays a pivotal role in data analysis. Read more 26 Oct 2023 Jakub Romanowski How to Prepare for the SQL Assessment Test In this guide, I’ll walk you through the essentials of SQL assessment preparation, from understanding database management to mastering data analysis and SQL commands. Let’s dive in and set you on the path to success. In today's data-centric world, mastering SQL proficiency holds paramount importance. Whether you're a seasoned database manager or a newbie exploring the realm of database management, gearing up for an SQL Assessment is crucial. Stepping into the world of SQL can be both thrilling and challenging. Read more 26 Sep 2023 Kamila Ostrowska How SQL Can Help You Understand Your Clients Better In this article, we will delve into how SQL can help businesses analyze customer data, uncover patterns, and make informed decisions to meet their clients' needs. Managing and understanding clients is crucial for any business, and this requires data. Client data, such as purchasing habits, preferences, and feedback, is typically stored in databases. To access and analyze this data, you need to be proficient in SQL, the language designed for managing and querying data in databases. Read more 19 Sep 2023 Alexandre Bruffa Python vs. SQL for Data Analysis You surely have heard about SQL and Python. Maybe you’ve even worked with one of those languages. Both have strengths and weaknesses. When it comes to data analysis, which should you use? This article will demonstrate how Python and SQL are useful for data analysis and how knowing both languages can boost your data analysis journey. Decided to get into data analytics? Great! An increasing number of companies are looking for people who can analyze data and draw conclusions from it. Read more 29 Aug 2023 Maria Durkin AI for Data Analysis: How the Fusion of AI and SQL Can Accelerate Your Workflow Did you know that using AI for data analysis can be a total game changer for SQL developers and data analysts? In this article, we’ll learn about how AI can help you level up your data analysis skills and why it’s a must-have tool in every data professional’s toolkit. Artificial Intelligence (AI) has emerged as a game-changer in the workforce, transforming industries and redefining how professionals deal with data. Specifically, the use of AI for data analysis is becoming increasingly critical in making informed decisions. Read more 25 Aug 2023 LearnSQL.com Team SQL for Data Analysis Cheat Sheet Welcome to our SQL for Data Analysis Cheat Sheet — a must-have resource for anyone looking to harness the power of SQL in the realm of data analysis. Whether you're a data enthusiast, a business analyst, or a seasoned data professional, this cheat sheet is designed to empower you to extract valuable insights from your datasets. Inside, you'll find a carefully curated collection of SQL commands and tips that will elevate your data analysis game. Read more 3 Aug 2023 Jakub Romanowski Best SQL Books for Data Analysis In the world of data analysis, SQL is a powerful tool. It's a language that helps professionals find, organize, and analyze the data stored in databases. If you're looking to learn this important skill, you've come to the right place. This article will guide you through the best SQL books for data analysis, whether you're just starting out or already have some experience. SQL (Structured Query Language) is a standard language used for working with databases. Read more 18 Jul 2023 Maria Durkin SQL for Data Analysis: What Should I Learn? You may already be aware of SQL's importance in data analytics. But what features of SQL are important to data analysis and where can you learn them? In this article, we will answer your questions. Before we talk about using SQL for data analysis, it helps to know what we’re talking about. So, let’s define these two things. Structured Query Language (SQL) is a programming language that is used to manage data in relational databases. Read more 6 Jul 2023 Jill Thornhill Google BigQuery SQL Syntax: A Comprehensive Guide What is Google BigQuery? What can it do for your organization? Is BigQuery SQL a valuable skill? Where can you learn it, and where can you get some practice? Very few organizations today are not computerized. Many processes now make use of the IoT (Internet of Things), where all kinds of devices are networked and continually feed real time data into computer systems. The result is a vast amount of data available for decision-making. Read more 1 Jun 2023 Nicole Darnley Why Do You Need SQL to Work With Google BigQuery? Data is just as important to your business as investing or accounting; that’s why many people use Google’s BigQuery data warehouse. In this article, we'll discuss why you should learn SQL if you want to start using BigQuery. Unleash the power of your data! In the ever-growing landscape of data-driven decisions, organizations are continuously on the lookout for tools that can help them handle and analyze their data efficiently. Enter Google BigQuery: a powerful, Cloud-based data warehouse designed to store and analyze massive datasets in record time. Read more 11 May 2023 Jill Thornhill Why Is Data a Valuable Resource for Your Business? How do you build an effective data resource and make it work for you? In this article, I'll look at why data is so important to any organization and how to make the most of your data resources. Bad decisions are almost always based on incorrect or incomplete facts. Good decisions keep your organization competitive. In a nutshell, that’s why data is such an important business resource. Ever since the dawn of civilization, our ancestors have known the value of information. Read more 9 May 2023 Maria Durkin Why SQL Is the Perfect Database Language Which programming language should you learn if you want to work with databases? We’ll explain why SQL is the top choice! Learning a database language can be an incredibly valuable skill in today's data-driven world. But with so many options out there, it can be difficult to know where to start. In this article, we'll make a compelling case for why SQL is the ideal choice for anyone looking to dive into the world of databases. Read more 2 May 2023 Nicole Darnley Top 7 Advanced SQL Queries for Data Analysis Explore essential advanced SQL queries for data analysis. Structured Query Language, or SQL, is an indispensable tool for data analysts. Most people pick up the language relatively quickly and can begin in-depth data analysis after just a few lessons. Because of this, many data analysts tend to stay in the beginner/intermediate level of using SQL. This level of understanding allows you to “get the job done”, but it might not be the most efficient way to write a query. Read more 9 Feb 2023 Nicole Darnley Learn SQL for Data Analysis with LearnSQL.com Updated on: December 1, 2023 Discover how to learn SQL for data analysis and start making sense of your data today. Our guide provides a clear and simple SQL learning path for data analysts, helping you query databases and analyze data with ease. Whether you're starting from scratch or looking to polish your skills, we'll help you every step of the way. When I was in high school, I planned to go to college and major in interior design. Read more 13 Oct 2022 András Novoszáth Here's Why You Need Analytical Skills to Get Promoted at Work Do you wonder if analytical skills might benefit you in your job? Are ‘analytical skills’ the same as data analytics? Is SQL a useful analytical skill? Read the article to answer these questions. Analytical skills allow you to better understand problems in your work; good analytical skills bring many benefits to your career. The term ‘analytical’ refers to a wide range of traits and capabilities, making it sometimes ironically vague and general. Read more 22 Sep 2022 Kateryna Koidan Roadmap to Becoming a Data Analyst What is a data analyst? What are their daily duties, and what skills do they need? In this article, I discuss the role of data analysts and share a step-by-step guide on how to become one. As organizations start to realize the value of their data on their customers, target audience, competitors, suppliers, and other market players, the role of data analysts becomes more important. To become a successful data analyst who can bring real value to the organization, you need to possess a specific set of skills. Read more 30 Aug 2022 Kateryna Koidan How to Learn SQL for Marketing Analytics With LearnSQL.com SQL is a valuable tool for any experts wanting to make data-driven decisions. Marketers are no exception. Let's explore how to design an effective learning path for SQL in marketing. SQL for marketing analytics is used to understand customers better and to increase the effectiveness of marketing campaigns. If you work in marketing and want to join other marketing experts who have already benefited from this tool, you need to learn SQL. Read more 21 Jul 2022 Kateryna Koidan Use SQL for Data Analysis With the New Google Analytics 4 As Google is sunsetting its Universal Analytics in favor of Google Analytics 4, data analysts need to adapt and learn how to get the most from the new tool. In this article, I'll discuss how to enhance your data analysis by using SQL with Google Analytics 4. Universal Analytics by Google has been helping data analysts and marketers in all industries everywhere understand their audience better. However, Google recently announced they would stop their support of Universal Analytics on July 1, 2023. Read more 14 Jun 2022 Himanshu Kathuria These SQL Queries Will Help You With Data Analysis Need to streamline your everyday data analysis tasks? This article explains how basic SQL queries can help. If you are planning a corporate career or any field that involves working with data, you must have come across SQL, or Structured Query Language. SQL was first developed in the 1970s and it continues to be the industry standard for database interactions. Many of you may already have decided to learn this language, given how powerful it is. Read more 9 Jun 2022 András Novoszáth 5 Tips for You From a Senior SQL Data Analyst Are you looking for tips for becoming a better data analyst? Do you want to know about the mistakes and issues you may face? I have collected five tips for your everyday work based on my experience as a data analyst. You may have already read about what data analysts do, how much they earn, and how to become one. However, there is more to it than just becoming a data analyst. Read more 5 May 2022 Himanshu Kathuria Why Should Every Data Analyst Know SQL? In the 1980s and 90s, it was the emergence of ERPs, processing a few thousand transactions a day. Now, sophisticated Cloud-based systems work with billions of transactions each day. How data is captured and handled has come a long way! Anybody who understands how to use this data has an edge. The good thing is that while the technology working in the background has become more complex, we don’t necessarily need to understand the underlying system’s details to use it. Read more 17 Mar 2022 Kateryna Koidan Are You Ready to Become a Data Analyst? Data analysts enjoy strong career prospects. Do you have the skills required for this role? Let’s find out! If you enjoy working with data, searching for interesting patterns and valuable insights, you may wonder “Should I become a data analyst?” In this article, I’ll explain what data analysts do and what skills a successful data analyst needs. What Does a Data Analyst Do? Data-driven organizations rely on specialists who know how to get value out of data. Read more 28 Dec 2021 Karolina Niewiarowska Here’s How I Started Creating SQL Reports Once upon a time, there was a girl who was just starting her adventure with learning SQL. As a marketer, one of her tasks was writing reports. Previously, she used Excel, a calculator, and written notes to prepare the reports her boss required. One day, it turned out that she could do her job much faster and easier. That was the day she read about SQL reports for the first time. Read more 26 Nov 2021 András Novoszáth Here’s Why You Should Use SQL for Sales Analytics Would you like to understand how your sales efforts play out so that you know where to put your focus? Do you want to empower your sales teams with sales analytics? This article shows you how you can use SQL to use your sales data to your advantage. If you work in sales, understanding the activities that produce results has financial consequences for you, your team, and your company. This is where sales analytics can really help you. Read more 14 Oct 2021 Kateryna Koidan Still Using Excel for Data Analysis? See Why SQL Is Better! Are you working with data and still using spreadsheets? Many people think that only programmers or professional data analysts can leverage SQL for data analysis. In this article, I’ll show how people with no IT background can use SQL for their daily work tasks. Not all people working with data have the corresponding job titles like data scientist, data analyst, or data engineer. Following the data democratization trend, almost all office workers do something with data as part of their daily duties – marketers analyze advertising campaigns, HR specialists analyze employee dynamics, auditors analyze credit portfolios, etc. Read more 13 Oct 2021 András Novoszáth Read These 5 Data Analysis Books to Jump-Start Your Career Do you want to pivot into a data analyst role, but you are unsure where to start? Do you do analytics in your job and would like to learn more about the big picture of data? Are you looking for a great data analysis book to read? In this article, you will find our selection of the best books on data analysis! If you are a business professional thinking about picking up data analytics skills, you may be wondering how you should start. Read more 15 Sep 2021 Himanshu Kathuria Top 10 Tools for Business Analytics Business Analytics is one of today’s hottest career fields. However, success as a business analyst requires that you learn the right skills and software programs. Let’s see what tools you should know if you want to be a business analyst. With the world generating immense amounts of data – and having systems in place to capture and manipulate that data to fuel business growth – job opportunities for business analysts are only going to grow. Read more 3 Sep 2021 András Novoszáth Why You Should Use SQL in Marketing Analytics Have you been wondering how you could use SQL in your marketing data analysis work? Would you like to create SQL reports to guide your marketing decisions? In this article, you will learn how to use SQL for marketing through plenty of use cases. Are you a marketing professional wanting to better understand the results of your marketing efforts? Do you want better means to prove your point and demonstrate the value you create? Read more 27 Aug 2021 Marcin Koryszewski How Much Do Data Analysts Earn in 2021? How Much Do Data Analysts Earn in 2021? How much does a data analyst earn? We did some data analysis ourselves. Nothing fancy, but it will give you some extra motivation for learning SQL for your data analyst gig. Data, data everywhere! We live in the world of (big) data. Having data is just the first step. Knowing what to do with it, how to interpret it, and what insights it holds, is true greatness. Read more 20 Aug 2021 András Novoszáth Why You Should Work in a Data-Driven Company Does accessing and using data collected by your company feel painful? Have you heard about data-driven companies? Working in a data-driven company may give you the ownership and the opportunities to use your company’s data. Read our article to learn more! If you work in a company, chances are that you want to do data analysis to solve problems. However, this is often not easy. You face many obstacles, impeding access to the data you need. Read more 21 Jul 2021 András Novoszáth How SQL Can Help You Democratize Data in Your Company Are you drowning in an ocean of data but lack the staff to find the treasures in it? Do bottlenecks clog your data and reporting processes? Have you heard about data democratization and wondered what all the fuss is about? In this article, we answer your questions! If you are a part of an organization that works with data, limited access is one of your biggest bottlenecks. It impedes data-related processes and prevents you from generating insights about your business. Read more 29 Jun 2021 Kate Stolarek Skills Every Data Analyst Should Have If you’re a student looking for career advice or a specialist seeking new job opportunities, find out if a data analyst job is something worth considering. In today's article, I explain the essential skills required for data analysts and benefits that come from performing such a job. What Is a Data Analyst? Let’s start by defining exactly what a data analyst is. A data analyst is someone who uses their skills to collect, analyze, and report insights from company data. Read more 25 Jun 2021 András Novoszáth Data Analyst vs. Data Engineer: A Full Comparison Do you want to become a data analyst? Or maybe you dream about being a data engineer? Can't make up your mind? I'll help you. Read about the two roles’ history, their market situation, and the skills you need to become one. You already know that it's a good idea to enter the data world and work with databases. But how to do it? Behind which door is the better career waiting for you? Read more 22 Jun 2021 Himanshu Kathuria Why Does Your Company Need Data Analysis? Data is the new gold. That is what the biggest in the business say, knowing the value of the data, the analyses, and the conclusions they bring. If you are wondering why your company needs data analysis and what value it could bring to your business, then this article is for you. Historically, many companies have gone into analytics mainly through financial and accounting data to improve revenue, reduce costs, and eventually increase profitability. Read more 16 Apr 2021 Himanshu Kathuria Analyze, Get Insights, and Make Money: SQL Data Analysis for Small Datasets If you think SQL data analysis is useful only when a business is generating millions of rows of data – that SQL cannot help you if you are generating a limited dataset – think again and read on! There is so much talk about how SQL is useful in analyzing Big Data that sometimes the applications of SQL data analysis for small datasets can go unnoticed. Having worked with early-stage businesses – which have just started generating data through daily transactions – as well as big established clients generating terabytes of data, I can tell you for sure that SQL can be an extremely handy tool for just about any business. Read more 12 Feb 2021 Tihomir Babic 6 Advanced SQL Queries for Analyzing Financial Data Are you an advanced SQL user who’s new to finance? Do you want to learn how to use your knowledge to analyze financial data? The article will give you some guidance. You probably know that SQL is a potent tool for analyzing all sorts of data. The bigger and more complex data, the more beneficial SQL becomes. In certain situations, financial data can be very complicated; producing a sophisticated analysis requires sophisticated tools. Read more 25 Sep 2019 Shanika Wickramasinghe Why Use SQL Over Excel SQL is replacing Excel in many fields, and data analysis is certainly one of them. If you are still using Excel as a data analyst, you are missing something very valuable. SQL can make your life easier, as it's more efficient and faster than Excel. So, how and from where can you learn SQL? How Can SQL Help Data Analyst? You can use SQL to help you with the following work: Read more 14 Aug 2018 Aldo Zelen SQL Indexing 101 Indexes are one of the most misused and misunderstood entities in physical database design. A good understanding of indexes and how they solve database performance problems is necessary for any database novice. In this article, we'll look at basic database indexes and their role in database development. To picture what an index is, consider a textbook. At the end of most textbooks is an index listing all the terms one can find in the text and the pages on which they appear. Read more 31 Jul 2018 Aldo Zelen How to Use a SQL Wildcard SQL wildcard allows us to filter data matching certain patterns in SQL. We use SQL wildcards with the LIKE operator in the WHERE clause of a query to filter data. In this beginner’s article, we’ll look at everything you need to know about basic SQL wildcards. If you like playing cards, then you know that wildcards can substitute any other card in your deck. Similarly, SQL wildcards can substitute one or more characters. Read more 24 Jul 2018 Dorota Wdzięczna Our Picks for 2020’s 7 Best Online SQL Schools If you’re looking for the best online SQL courses but aren’t sure where to start, you’re in the right place. I evaluated the top 7 ranked SQL schools available online to help you find the right solution. While summer is a great time to relax and get away from work, it’s also an excellent opportunity to learn new skills – like SQL! Thanks to SQL schools putting their courses on the internet, learning new tech skills is super easy and you can choose from a variety of formats to suit your needs. Read more 6 Jul 2018 Kate Stolarek Why Learn SQL Over the Summer Think summer is reserved for flying to warm places and hanging out at the beach? Sure! But it's also a great time to learn new skills that you haven't had time for. If you recently graduated from high school and want to get a head start on computer programming for college, learning SQL over the summer is a great opportunity. You have nothing to lose and everything to gain—SQL is actually really easy to learn, especially with so much free time over the summer. Read more 13 Jun 2018 Aldo Zelen Key Insights for Mastering SQL Queries Using Tinder Data Example Going from zero to one can be daunting in any endeavor. The same is true for learning new programming languages, even simple ones like SQL. In this article, we’ll take a look at some key insights that will help you understand the nuances of mastering SQL queries. If you’ve never used SQL, you’re in the right place. When learning anything new, you’ll find that there are always some key insights or tips that can help you on your way. Read more 8 Jun 2018 Ignacio L. Bisso Improving Slow Query Performance: When Runtime Matters As SQL users, we usually focus on writing queries that return correct results. However, there are more things to consider when you're writing a query; one of them is query performance. In this article, we'll look at some examples where query response time is critical. Scene One: 911 Call Center Let's suppose we're at a 911 call center, when the phone rings. One of the operators answers the call; a witness reports that a man has been shot. Read more 8 May 2018 Ignacio L. Bisso Converting Subqueries to Joins Not all queries are alike, especially in terms of performance. In this article, we'll look at how you can convert SQL subqueries to joins for improved efficiency. When should I use SQL subqueries? Great question! Unfortunately, there's no concrete answer. SQL beginners tend to overuse subqueries. Typically, once they find that SQL construction works in one situation, they try to apply that same approach to other situations. It's only natural. Read more 10 Apr 2018 Ignacio L. Bisso Learn to Write a SQL Correlated Subquery in 5 Minutes If you’re familiar with the famous Russian nesting doll, then SQL correlated subqueries should be a peace of cake to understand—subqueries are just queries nested within queries. An SQL subquery is often called an “inner” query; the main query is usually called the “outer” query. This article covers everything you need to know about correlated subqueries. What Exactly is a SQL Correlated Subquery? A correlated SQL subquery is just a subquery that is executed many times—once for each record (row) returned by the outer (main) query. Read more 4 Apr 2018 Aldo Zelen How to Become a Database Analyst Curious about becoming a database analyst? Maybe you've taken some database courses at university and they really struck a chord. Or maybe you learned online. Now you're thinking about making a career out of working with databases. Where would you start? What should you expect at each phase of your professional development? In this post, we'll explore the challenging and exciting world of databases analysis. We'll go from the very beginning of a career to the apex of professional success. Read more 29 Mar 2018 Ignacio L. Bisso Extracting Data From a String: SPLIT_PART in PostgreSQL Learn how to use split_part in PostgreSQL to extract data from strings. Quite often, we’d like to extract parts of a string when working with text values. A common example is when we have a full name and need to retrieve only the last name. In this article, we’ll examine how to do it using split_part in PostgreSQL, i.e. a string-related function that can be used to extract a substring. Read more 15 Dec 2017 Dejan Sarka High-Performance Statistical Queries: Dependencies Between Discrete Variables In my previous article, we looked at how you can calculate linear dependencies between two continuous variables with covariance and correlation. Both methods use the means of the two variables in their calculations. However, mean values and other population moments make no sense for categorical (nominal) variables. For instance, if you denote "Clerical" as 1 and "Professional" as 2 for an occupation variable, what does the average of 1.5 signify? Read more 29 Nov 2017 Kacper Skawina Digging Into Data: Explore and Analyze Survey Results With SQL Excel is a powerful beast that lets you analyze complex data. Yet, operating on big chunks of data can sometimes be a daunting task. Let's take a look at how SQL can help. Today, we'll tackle a common problem with importing data to an SQL database, using a real-life example. Suppose your company conducted a survey on the most popular programming trends and preferences, striving to meet the expectations of its users. Read more 23 Nov 2017 Dorota Wdzięczna SQL Hacks To Control Family Budget On Black Friday Weekend If you’re in the US, chances are you’ve been eagerly awaiting the approach of Black Friday just as much as Thanksgiving. Though the shopping frenzy takes hold of nearly everyone, some people have to stick to their budgets and shop prudently. In this article, we’ll take a look at how generating an SQL report can help you track how much your family spent shopping on Black Friday. Storing Black Friday Purchases in a Database Before we can create an SQL report, we first need some data we can use. Read more 13 Nov 2017 Aldo Zelen Introduction to Reporting with SQL — the Ultimate Tutorial for Business Professionals Working with the financial aspects of large and small enterprises can be a daunting task for a business professional. In this article, we'll look at several ways of constructing the perfect SQL report. You've probably already heard about SQL from your colleagues or in other areas of your career. If you're here, you've likely concluded that learning SQL will make your professional life easier – and you're right! Read more 28 Mar 2017 Dejan Sarka SQL Statistical Analysis Part 1: Calculating Frequencies and Histograms Database and Business Intelligence (BI) developers create huge numbers of reports on a daily basis, and data analyses are an integral part of them. If you wonder whether you can perform statistical analysis in SQL, the answer is ‘yes’. Read my article to learn how to do this! Statistics are very useful as an initial stage of a more in-depth analysis, i.e. for data overview and data quality assessment. However, SQL statistical analysis possibilities are somewhat limited as there are not many statistical functions in SQL Server. Read more