Definition and Usage The NULLIF () function returns NULL if two expressions are equal, otherwise it returns the first expression. Syntax

2024年11月22日 · NULLIF returns the first expression if the two expressions are not equal. If the expressions are equal, NULLIF returns a null value of the type of the first expression.

2024年6月25日 · The NULLIF () function compares two expressions and returns NULL if they are equal; otherwise, it returns the first expression. It is different from the ISNULL operator, which …

In this tutorial, you will learn how to use the SQL NULLIF function to compare two values and return NULL if they are equal.

This tutorial introduces you to the SQL Server NULLIF expression and gives you some practical examples of using the NULLIF expression.

2023年6月10日 · The SQL NULLIF is a handy function for working wth NULL values. Learn how to use it in different vendors with examples in this article.

NULLIF scalar function The NULLIF function returns a null value if the arguments are equal, otherwise it returns the value of the first argument.

2022年5月8日 · Most major RDBMS s support the NULLIF() operator, which returns NULL if both of its arguments are equivalent. If the arguments not equivalent, NULLIF() returns the first …

NULLIF Syntax nullif::= Description of the illustration nullif.gif Purpose NULLIF compares expr1 and expr2. If they are equal, then the function returns null. If they are not equal, then the …

NULLIF is a function available in most RDBMS to compare 2 expressions and determine if they are same or different. It can compare both numeric and string values specified directly or …