SQL is a standard language for storing, manipulating and retrieving data in databases. Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, …

Firstly, it introduced the concept of accessing many records with one single command. Secondly, it eliminates the need to specify how to reach a record, i.e., with or without an index.

This tutorial introduces you to the SQL comparison operators and shows you how to use them to form conditions for filtering data.

Nov 18, 2025 · Using <> in a simple query. The following example returns all rows in the Production.ProductCategory table that do not have value in ProductCategoryID that is equal to …

Jun 9, 2023 · Learn about the different types of SQL comparison operators like =, >, <, and more and how these can be used to narrow down query results.

In SQL Server, you can use the <> or != operators to test for inequality in a query. For example, we could test for inequality using the <> operator, as follows: In this example, the SELECT …

Jul 23, 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 …

SQL, or Structured Query Language, is a language designed to allow both technical and non-technical users to query, manipulate, and transform data from a relational database. And due …

Jan 2, 2026 · Structured Query Language (SQL) is the standard language for data manipulation in a DBMS. In in simple words its used to talk to the data in a DBMS. Following are types of SQL …

This tutorial provides you with easy to understand SQL instructions and allows you to practice while you are learning, using an online SQL interpreter. By practicing your SQL commands …