People who work with data know that data grouping can sometimes be a chore. If you struggle and waste hours with Excel, OpenOffice, or some other tool trying to group various sets of data, take a look at this article and learn how to do the work much quicker and easier by using SQL. You often find yourself in a situation where you need to analyze data and present the results in a form other than the one in which the data is stored.
How to Work Better and Faster with SQL Basics? Data-driven marketing isn’t the future – it’s what the best marketers are using for their work right now. In this article, we give you the lowdown on an amazing marketing hack that more and more employers are demanding. Read on and find out if SQL can boost your campaigns by helping you pursue a more data-driven approach. If you’re interested in learning more, take our SQL Basics course.
SQL is not a traditional programming language in which you write a sequence of instructions in a given order of execution. Instead, SQL is a “declarative” language, which means that by writing a SQL query, you declare what data you expect as a result of the query, but you don’t indicate how to obtain it. Six Operations to Order: SELECT, FROM, WHERE, GROUP BY, HAVING, and ORDER BY By using examples, we will explain the execution order of the six most common operations or pieces in an SQL query.
How do you get data from a table? How do you create or delete a table? How do you display distinct records? How do you select rows which store a specific value in a column? You can easily do all of this by writing basic SQL queries. This guide discusses the 30 most important SQL queries for beginners. Let’s take a look. 1. Retrieving Data From All Columns This is a very basic query to display all data from a table.
Already know some SQL basics and want to take your PostgreSQL skills to the next level? Learn how to create, use, and manage your own functions in PostgreSQL. We’re pleased to announce the launch of our new online course: Writing User-Defined Functions in PostgreSQL. This course is aimed at people who already know some basic SQL and greatly benefits not only PostgreSQL developers and database administrators but also anyone interested in database programming (especially through PostgreSQL).
YouTube is not just funny cats, music clips, and viral videos. It can also be a mine of knowledge – if you know where to look. Can YouTube tutorials really help you learn SQL? Let's say you're a marketer or an accountant. You work with databases every day. But when it’s time to write a query and get specific data, you need to call someone from IT. Why not learn to do it yourself?
Writing queries to a database requires knowledge about SQL syntax, but this is not all you should know. Best practices for writing professional SQL code require good formatting skills. In this article I discuss why this is so important and what are the basic rules you should follow. Why is it Worthwhile to Format SQL Code? Beginner SQL programmers often don't pay much attention to formatting their code. If you think formatting is something that can be safely ignored, look at the code below:
How do you visualize the results of an SQL query? You usually need to use multiple tools to achieve that. Why not use a tool that communicates with SQL directly and can perform any data analysis task? R is a data-oriented programming language that uses packages (libraries) to help you with nearly every imaginable data analysis task and more. Some of these packages allow R connect to an SQL database so you can query it and perform any desired action on the result set.
In this article, I will cover perhaps the most important element of the SQL language. That's right! I'm talking about the SQL INNER JOIN clause. As you know, in a database the data are stored in several tables. In my last article, I covered how to create SQL queries when the data you need is in only one table. But what if the data you need is in two tables?
Find out why you should forget about Excel and start using SQL even if you’re not an IT expert. We’ll show you how easy it is to learn SQL, how it can make you work better, and how Vertabelo Academy makes the learning process fun. “I Don’t Deal With Data” We frequently hear the sentence above from people outside the IT industry. Well, it’s not entirely true. Data is now almost everywhere.
In my last article, I roughly described how standard SQL differs from T-SQL and who should learn which. Now I’d like to focus on the syntax differences and illustrate these differences with examples. If you think T-SQL is an extension implementing all the features from standard SQL, you aren’t right. However, in SQL Server you will find almost all the features of the SQL standard. In this article you will find examples of some of the differences in syntax between standard SQL and Transact-SQL.
Level: Advanced Most commonly, the SQL queries we run on a database are quite simple. Well, that depends on your role, of course. Analysts in data warehouses retrieve completely different sorts of information using (very often) much more complicated queries than software engineers creating CRUD applications. However, sometimes it’s simpler or more elegant to run a query that is a little bit more sophisticated without needing further data processing in the code.
If you are beginning to learn SQL and are confused by the differences between SQL and other similar languages like T-SQL, this article will help make things clear. You will also find explanations concerning which topics would be better to start learning first: general SQL or something more specific like MS SQL Server. What is SQL? SQL (Structured Query Language) is a basic ANSI/ISO standard programming language designed to operate on data stored in relational databases.
Thinking about using Microsoft SQL Server? If so, you’re in the right place. In this article, we’ll look at the Microsoft SQL Server platform and go over its pros and cons. We’ll also evaluate the platform from both a company’s and a data specialist’s perspective. What Is Microsoft SQL Server? In technical terms, Microsoft SQL Server is a relational database management system (RDBMS) developed by Microsoft. Essentially, it’s software that allows you to store, change, and manage relational data effectively.
Installing database software like PostgreSQL, Oracle, or SQL Server can seem like a complicated task, but it really isn’t! These days, most relational database management systems come with installation wizards that make the process much simpler. In this article, we’ll look at how to install PostgreSQL and test that the installation is working. Overview: PostgreSQL Installation Steps We’ll complete the following tasks: Downloading the PostgreSQL package. Installing and configuring PostgreSQL.
Typical business users make decisions based on gut feelings, but this can’t get them so far. In this article, we’ll look at how learning to write basic SQL queries helps your company become a data-driven organization. Businesses face many decisions. Do we increase our advertising budget in one region or the other? Are certain products selling quickly enough? What we should do if they aren’t? Most of these decisions are driven by intuition, but organizations that make the most business impact use data-driven decision-making.
-- -- Microsoft SQL Server is one of the most popular professional database servers on the market. In this guide, we’ll help you install SQL Server on the Windows operating system together with SQL Management Studio. How to Install SQL Server 2017 We’ll install SQL Server 2017 in this guide. You can download it for Windows and Linux, but you can’t install Microsoft SQL Management Studio on Linux at the moment, so we recommend you stick to Windows.
In this article, I’ll explain how to run a SQL query to help you execute your first one. Let’s jump right in! Running SQL queries for the first time is not a complex task, but it can seem intimidating at first if you’re a complete beginner. But once you get past that initial roadblock, you’ll be able to focus on learning SQL and writing more interesting queries to meet your business needs.
Information technology is one of the hottest industries in the world and offers thousands of job in each major city around the globe. If you’re a student or professional who wants to get IT skills and find your first job in the industry, Vertabelo Academy can help you get started. The range of IT jobs available is stunning—from software engineers to system administrators and data scientists, IT rules the job market.
One of the oldest jokes in the business world goes like this: The CFO asked the CEO, “What happens if we invest in developing people and they leave us?” The CEO answered, “What happens if we don’t and they stay?” If you’re like the CEO and want to help your employees grow, this article will explain how you can do so with Vertabelo Academy. Vertabelo Academy has been around since 2015.
If you plan to learn SQL online but aren’t sure where to start, you’re in the right place. I evaluated the top 7 ranked SQL online courses to help you find the right solution. While summer’s a great time to relax and get away from work, it’s also an excellent opportunity to learn new skills—like SQL! Thanks to online schools, learning new tech skills is super easy, and you can choose from a variety of formats to suit your needs, like courses and tutorials.
Excel allows business professionals to unlock the potential of their data – to a point. But when it comes to storing and manipulating large amounts of data, Excel can cause some problems. Excel has many good points. It’s often used by specialists to work with data related to their particular field. But it can come with problems, such as sluggish performance and difficult team collaboration. Even worse, Excel is vulnerable to the most dreaded problem of all: the accidental deletion of important data.
We asked our users why they decided to learn SQL. This is what we’ve learned. At Vertabelo Academy, we help people with no computer science backgroundto understand the core concepts of databasesand data science. For example, we teach users how to extract the most important data from a database to build simple reportsand how to understand key statistical metrics in data analysis. We love to provide easy-to-understand examples that thoroughly depict complex technical concepts.
Thanksgiving is a holiday many Americans celebrate with their families and friends, seated around a table loaded with a hearty feast. The most prominent of all dishes is, of course, the turkey. However, at least a few other specialties are also cooked for Thanksgiving. Do you find it hard to choose what to prepare? If so, we’ve got a solution for you: a special SQL query that will help you pick the best dishes.
Has online learning killed traditional learning? Can they coexist? Or, together, can they form something great? When I decided to write about traditional ways of learning, I was sure there was something to write about. But I wasn’t sure exactly what. I looked at some traditional learning and teaching methods, which gave me pause. Nearly each one turned out to be not entirely traditional. Wherever I looked, digital influences were making inroads.
If you want your business to succeed in 2017, it’s absolutely critical that you understand your data. If you want your business to succeed in 2017, it’s absolutely critical that you understand your data. Don’t fall for the common trap—analyzing data isn’t just a concern for those competing at national or corporate levels. In fact, all businesses have plenty of data that they can use to potentially improve their workflow.
Recipes that make querying easy, even for the novice. In today’s information age, we have at our fingertips almost an overabundance of teaching and information on any and every subject. In the midst of this glut of information, it can be hard to decide which is the best source for our needs. But, fear not; we are here to assist you as you navigate through decisions about books on SQL topics!