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Nullif Sql, SQL COALESCE (), IFNULL (), ISNULL (), and NVL () Functions Operations involving NULL values can sometimes lead to unexpected results. Let’s look at two of them. (Works in MySQL, SQL Server and Oracle) IFNULL() - (MySQL) ISNULL() - (SQL Server) Jan 11, 2026 · Learn the NULLIF () function in SQL Server with simple examples. Apr 7, 2025 · Handling NULL with NULLIF and ISNULL Handling NULL values can be a challenge and may lead to unexpected query results when mixed in with non-NULL values. See syntax, examples, and applications with table data. This SQL Tutorial helps you master SQL quickly and effectively through many hands-on and practical examples with quizzes. The following SQL lists all customers with a NULL value in the "Address" field: Jan 6, 2019 · 文章浏览阅读10w+次，点赞145次，收藏599次。本文详细介绍了MySQL中IF (), IFNULL (), NULLIF (), ISNULL ()等流程控制函数的使用方法和示例，帮助读者理解如何在SQL查询中进行条件判断和空值处理。 Mar 6, 2012 · 203 In SQL, a comparison between a null value and any other value (including another null) using a comparison operator (eg =, !=, <, etc) will result in a null, which is considered as false for the purposes of a where clause (strictly speaking, it's "not true", rather than "false", but the effect is the same). Thankfully, there are a few SQL Server functions devoted to handling NULL values. In this tutorial, you will learn how to use the SQL NULLIF function to compare two values and return NULL if they are equal. If two arguments passed to a function are equal, the NULLIF () function returns Null to us. gj7k, hhv6, nj, lvgsz, kzf, wl1z7, x6mgbe, 34wfncg9, jvvfym, kdwy,