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- 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.
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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.
- Basic SQL Syntax
- Data Types in SQL
- SQL Operators
- SQL Functions
- SQL Views
- SQL Indexes
- SQL Constraints
- SQL Transactions
- SQL Performance Tuning Tips
- Conclusion
This section is the essential SQL syntax cheat sheet. If you’re short on time, read this section first.
The data type of a SQL column identifies how SQL will interact with the stored data. SQL is a strongly typed language, so it’s important to tell apart various data types. The same name may map to different data types in other SQL implementations. Therefore, always consult the relevant documentation (MySQL, PostgreSQL).
This subsection is a basic SQL operators cheat sheet, where you learn to create complex Boolean expressions in SQL queries.
SQL functions help you compute and analyze the contents of database tables. Here are some common SQL functions:
In SQL, a view is a virtual table based on the results of an SQL query. A view contains rows and columns, just like a real table. The fields in a view are fields from one or more real tables in the database. You can add SQL statements and functions to a view and present the data as if the data were coming from a single table. Here are the most impo...
Indexes are for speeding up data retrieval from a database. The users cannot see the indexes. Updating a table with indexes takes longer than updating a table without (because the indexes also need an update). So, only create indexes on the columns against which users frequently search.
Constraints are for specifying rules for data in a table. Use them with the CREATE TABLE statement for a new table or the ALTER TABLEstatement for an existing table. The syntax is: The table below lists common constraints in SQL:
A transaction is the propagation of one or more changes to the database. For example, you perform a transaction if you perform create, update, and delete operations on a table. Below we list the top SQL transactional commands:
As this article is a SQL basics cheat sheet, we present the following SQL performance optimization tips without elaboration.
This SQL command cheat sheet covers most SQL database tasks. We hope it has helped you solve your problems at hand. Bookmark the documentation links for your SQL implementation, such as MySQL or PostgreSQL. Remember to check out our articles on SQL and our beginner-friendly cyber security courses, which cover SQL injection attacks:
Aug 22, 2023 · 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...
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; Code language: SQL (Structured Query Language) (sql)
Feb 2, 2023 · 1. SQL Basics. 2. SQL JOINs. 3. Standard SQL Functions. 4. Window Functions. Boost Your Skills With Our SQL Cheat Sheet. Do you ever find yourself writing an SQL query and forgetting the syntax of some function? That sometimes happens to me too.
Sep 25, 2020 · Download this 2-page SQL Basics Cheat Sheet in PDF or PNG format, print it out, and stick to your desk. The SQL Basics Cheat Sheet provides you with the syntax of all basics clauses, shows you how to write different conditions, and has examples.
Jan 20, 2021 · Whether you’re learning SQL through one of our interactive SQL courses or by some other means, it can be really helpful to have a SQL cheat sheet. Bookmark this article, or download and print the PDF, and keep it handy for quick reference the next time you’re writing an SQL query!
