Feb 17, 2021 · If you're looking for more details and SQL resources, check out our Complete guide to SQL. Below is a comprehensive list of SQL commands, organized by the top-level of each (e.g. SELECT TOP is within the SELECT category).

In this tutorial we will teach you all about the different SQL statements. A database most often contains one or more tables. Each table is identified by a name (e.g. "Customers" or "Orders"), and contain records (rows) with data. In this tutorial we will use the well-known Northwind sample database (included in MS Access and MS SQL Server).

Mar 12, 2025 · In this guide, we will see a comprehensive cheat sheet for essential SQL operations, offering a practical reference for tasks ranging from database creation to advanced data handling techniques.

Download the 3-page SQL cheat sheet in PDF format. Query data of column1 and column2 from a table: column1, column2. FROM . table_name; Code language: SQL (Structured Query Language) (sql) Query all data from a table: FROM . table_name; Code language: SQL (Structured Query Language) (sql) Retrieve specific rows based on a condition: column1,

SQL Statement Syntax; AND / OR: SELECT column_name(s) FROM table_name WHERE condition AND|OR condition: ALTER TABLE: ALTER TABLE table_name ADD column_name datatype. or. ALTER TABLE table_name DROP COLUMN column_name: AS (alias) SELECT column_name AS column_alias FROM table_name. or. SELECT column_name FROM …

It is often used with aggregate functions like COUNT, SUM, AVG, etc. The HAVING clause filters grouped results based on a specified condition. The INNER JOIN command returns rows with matching values in both tables. The LEFT JOIN command returns all rows from the left table (first table) and the matching rows from the right table (second table).

Jul 24, 2024 · SQL syntax is essential for interacting with databases, enabling users to perform a variety of operations, from querying data to modifying database structures. Understanding and mastering these SQL commands and their syntax is crucial for efficient database management.

Mar 20, 2025 · A good way to gain hands-on SQL experience is by creating your own SQL database. By setting up a personalized database, you can tailor the structure and data to match real-world scenarios relevant to your industry or career objectives. ... thereby building confidence and proficiency in SQL. Here is a tutorial for you on how to Create Your Own ...

Jun 9, 2023 · SQL, or Structured Query Language, contains a range of commands for interacting with the database. This article lists all of those commands, what they do, and what they look like. All of these basic SQL commands work on Oracle, SQL Server, MySQL, and PostgreSQL, unless otherwise indicated.

Basic SQL statement structures are verbs, subjects, and conditions. Most SQL statements follow a pattern: Verb (Action): is the action you want the database to do, such as SELECT, INSERT, UPDATE, and DELETE. Subject (Target): is the database object you work with, such as a table. For example, you want to find the employees hired in 1999.