Back to articles list September 12, 2017 - 4 minutes read What Is Vertabelo’s SQL Cheat Sheet? Dorota Wdzięczna Dorota is an IT engineer and works as a Data Science Writer for Vertabelo. She has experience as a Java programmer, webmaster, teacher, lecturer, IT specialist, and coordinator of IT systems. In her free time, she loves working in the garden, taking photos of nature, especially macro photos of insects, and visiting beautiful locations in Poland. Tags: extras SQL basics Everyone, from rookie programmers to SQL ninjas, needs a bit of help now and again. Enter Vertabelo's SQL Cheat Sheet! Working with databases is hard. There's a lot of data to manage, which can be daunting. But the main challenge many database users face is the SQL commands themselves. It's all right when you're using the same familiar ones day after day, but what about the commands you dust off once or twice a year? Or what if you're just getting started with SQL? That's a lot to remember! SQL Cheat Sheet At Vertabelo Academy, we believe the best way of learning is by doing. But we're also realists, and we know that sometimes everyone needs a little help. That's why we created the SQL Cheat Sheet: to help you find quick answers for the most common SQL questions. What's inside SQL cheat sheet? SQL Queries Cheat Sheet is like the learning process on steroids. It covers basic SQL concepts, including how to: Retrieve data Work with single and multiple tables Group data Aggregate data We also include more advanced operations, like: Using subqueries Performing set operations on data The Cheat Sheet comes packed with examples queries, illustrations, and explained sample result tables that let you understand why this command does what it does. SQL Beginner? We've Got The Basics. If you're just beginner with SQL, you need to know how to build a query. Starting with the SELECT statement, the Cheat Sheet shows you how to get syntax right the first time. We also show you how to list one or several columns in your SELECT statement. The next step towards SQL mastery is to learning the WHERE clause and its various comparison operators ( IN, LIKE, IS NOT NULL, and BETWEEN AND). These operators let you choose the data you need, and they can be combined logical operators and multiple conditions. Sounds complicated, doesn't it? Don't worry; the Cheat Sheet will walk you through it. Maybe you can write SELECTs and WHEREs like a pro, but you're having trouble working with multiple tables. The Cheat Sheet will explain how and when to use INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN methods. You'll find examples of how to use each one in your queries. Advanced Users? Check Out Our Pro Tips. If you are more advanced SQL user, you may occasionally need help with some of SQL's powerful features like aggregation functions, subqueries or set operations. It's not just you – aggregation and grouping commands can be really frustrating, especially when you only use them occasionally! Our Cheat Sheet will give you step-by-step examples of the COUNT function, including the use of asterisks and column names as parameters. There's nothing worse than having a mess in your data. Knowing how to return data that's been grouped or filtered based on aggregate functions can really help you clean things up. To this end, we show you how to work with ORDER BY, GROUP BY and HAVING in these circumstances. We'll explain how to retrieve result rows using distinct values as a parameter in an aggregate function, which will really amp up your queries. SQL Cheat Sheet also demystifies SQL subqueries, so no worries if you can't remember the syntax. We cover the lot: single-value, multiple-value, and correlated subqueries. You'll also find out: How to use equality or IN operators with subqueries returning single or multiple values When to use the EXISTS operator What inequality operators are and how to use them The proper SQL syntax of the set operations like UNION, UNION ALL, INTERSECT, EXCEPT, and MINUS. Stop querying in the dark. Subscribe to our newsletter and download the best Vertabelo SQL Cheat Sheet for free right now! If all went smoothly, you should get an email from us! Click on the link in it, and get the SQL Cheat Sheet :) Tags: extras SQL basics You may also like You Want to Learn SQL? You've Come to the Right Place! If you want to learn SQL basics or enhance your SQL skills, check out LearnSQL.com for a wide range of SQL courses and tracks. Read more SQL Window Functions Cheat Sheet This 2-page SQL Window Functions Cheat Sheet covers the syntax of window functions and a list of window functions. Download it in PDF or PNG format. Read more 18 Useful Important SQL Functions to Learn ASAP Almost every company needs someone with knowledge of SQL. Structured Query Language is commonly used for business intelligence (BI), analysis, computation. Read more SQL Window Functions By Explanation Window functions in SQL operate on a set of table rows and return a single aggregated value for each of the rows. Read more Referential Constraints and Foreign Keys in MySQL Foreign keys and referential constraints allow you to set relationships between tables and modify database engine’s actions. See how to use it in MySQL. Read more An Illustrated Guide to the SQL OUTER JOIN An SQL JOIN clause links the data from two or more database tables. Let’s find out what is the OUTER JOIN and how does it work! Read more Common SQL Window Functions: Using Partitions With Ranking Functions Once you’ve learned such window functions as RANK or NTILE, it’s time to master using SQL partitions with ranking functions. 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