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Jun 18, 2024 · In this article, we will explore the ultimate SQL cheat sheet with the PDF download, covering a basic to advance of SQL commands, Joins in SQL, CRUD Operations, SQL Trigger, SQL Transactions, and advanced topics to help master SQL effectively.
- SQL
- Querying Single Table
- Filtering The Output
- Querying Multiple Tables
- Aggregation and Grouping
- Subqueries
- Set Operations
SQL, or Structured Query Language, is a language to talk to databases. It allows you to select specific data and to build complex reports. Today, SQL is a universal language of data. It is used in practically all technologies that process data.
Fetch all columns from the countrytable: Fetch id and name columns from the citytable: Fetch city names sorted by the ratingcolumn in the default ASCending order: Fetch city names sorted by the ratingcolumn in the DESCending order:
Comparison operators
Fetch names of cities that have a rating above 3: Fetch names of cities that are neither Berlin nor Madrid:
Text operators
Fetch names of cities that start with a 'P' or end with an 's': Fetch names of cities that start with any letter followed by'ublin' (like Dublin in Ireland or Lublin in Poland):
Other operators
Fetch names of cities that have a population between 500K and 5M: Fetch names of cities that don't miss a rating value: Fetch names of cities that are in countries with IDs 1, 4, 7, or 8:
INNER JOIN
JOIN (or explicitly INNER JOIN) returns rows that have matching values in both tables.
LEFT JOIN
LEFT JOIN returns all rows from the left table with corresponding rows from the right table. If there's no matching row, NULLs are returned as values from the second table.
RIGHT JOIN
RIGHT JOIN returns all rows from the right table with corresponding rows from the left table. If there's no matching row, NULLs are returned as values from the left table.
GROUP BY groupstogether rows that have the same values in specified columns. It computes summaries (aggregates) for each unique combination of values.
A subquery is a query that is nested inside another query, or inside another subquery. There are different types of subqueries.
Set operations are used to combine the results of two or more queries into a single result. The combined queries must return the same number of columns and compatible data types. The names of the corresponding columns can be different
Aug 22, 2023 · SQL Cheat Sheet for Quick Reference [PDF Download] Whether you need a quick reference for major SQL concepts before an interview, or you want to level-up your existing SQL skills, our SQL cheat sheet is the ideal starting point. Plus, we’ve broken it down into 11 essential SQL topics to help you get the most from this SQL query cheat sheet.
- An SQL cheat sheet is a brief summary of all the major concepts of the language for ease of reference. The SQL cheat sheet we have detailed above c...
- Practice is the best way to memorize SQL queries. You’ll find that it’s a lot easier to learn when you put them to actual use.
- A basic SQL commands cheat sheet is useful for quick learning. The 5 basic SQL command groups are Data Definition Language, Data Manipulation Langu...
Feb 2, 2023 · Cheat Sheet. Table of Contents. What Is SQL? Why Use SQL? Benefits of The Ultimate SQL Cheat Sheet. Topics Covered in Our Ultimate SQL Cheat Sheet. 1. SQL Basics. 2. SQL JOINs. 3. Standard SQL Functions. 4. Window Functions. Boost Your Skills With Our SQL Cheat Sheet.
May 10, 2024 · SQL Cheat Sheet Search. Search our SQL cheat sheet to find the right cheat for the term you're looking for. Simply enter the term in the search bar and you'll receive the matching cheats available. What Is SQL? SQL is short for Structured Query Language.
Sep 28, 2022 · Get a reference for many of the common SQL commands and features on this SQL Cheat Sheet page. This SQL Cheat Sheet applies to Oracle, SQL Server, MySQL, and Postgres. You can also find out more details on these features on the SQL Roadmap page. SELECT Query. SELECT col1, col2. FROM table. JOIN table2 ON table1.col = table2.col. WHERE condition.
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SQL Cheat Sheet. The SQL cheat sheet provides you with the most commonly used SQL statements for your reference. You can download the SQL cheat sheet as follows: Download 3-page SQL cheat sheet in PDF format. Querying data from a table. Query data in columns c1, c2 from a table. SELECT c1, c2 FROM t;
