As such, you need two operators for this, one for equality, and one for checking the concept of null. Once you start to think of null as "unknown value" a lot of the other behavior also makes sense.

SQL operators are keywords and symbols used to perform operations with data values. SQL operators is categorized into the following types: Exercise? What is this? Which SQL operator is used to add …

The IS operator is essential for data integrity checks and ensuring data quality in SQL queries. It allows for precise identification of NULL values, which represent missing or unknown data, and boolean …

Dec 13, 2025 · Among the most common sources of confusion is the distinction between the = (equals) operator and the IS operator, particularly when dealing with NULL. While both are used in conditional …

Apr 3, 2026 · SQL also provides several special operators that serve specific functions such as filtering data based on a range, checking for existence, and comparing sets of values.

Nov 18, 2025 · An operator is a symbol specifying an action that is performed on one or more expressions. The following table lists the operator categories that the SQL Server Database Engine …

In this tutorial, you will learn SQL IS operator to check whether a value is NULL or not.

Apr 8, 2025 · When writing SQL queries, we often need to filter out specific values by using a not equal condition. However, two different operators are available for this purpose: != and <>. In this tutorial, …

Mar 3, 2026 · MySQL IS operator tests a value against a Boolean value. A boolean value can be TRUE, FALSE, or UNKNOWN. Syntax: MySQL Version: 8.0. Example: MySQL IS operator. In the following …

Dec 16, 2025 · You can think of SQL operators as the tools that control how data is compared, calculated, filtered, and combined inside a query. In this article, we’ll cover six types of SQL …