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Definition and Usage. The NULLIF () function returns NULL if two expressions are equal, otherwise it returns the first expression. Syntax. NULLIF (expr1, expr2) Parameter Values. Technical Details. More Examples. Example. Compare two expressions: SELECT NULLIF('Hello', 'Hello'); Try it Yourself » Example. Compare two expressions:
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This tutorial introduces you to the SQL NULLIF function and shows you how to add the if-else condition to your SQL queries.
Summary: in this tutorial, you will learn how to use the SQL Server NULLIF expression to return NULL if the first argument equals to the second one. The NULLIF expression accepts two arguments and returns NULL if two arguments are equal.
8 maj 2022 · Syntax. The syntax goes like this: NULLIF (V1, V2) This is equivalent to the following CASE expression: CASE WHEN V1=V2 THEN NULL ELSE V1 END. Example. Here’s an example to demonstrate: SELECT NULLIF( 12, 12 ); Result: NULL. In this case, both arguments are identical and so the result is NULL.
Practice writing SQL to call data from the warehouse and sync it into Google Sheets in this 5 minute interactive demo. The complete guide to SQL NULLIF. Learn the syntax, parameters, use cases and find practical examples in the Hightouch SQL Dictionary.
NULLIF is equivalent to a searched CASE expression in which the two expressions are equal and the resulting expression is NULL. We recommend that you not use time-dependent functions, such as RAND(), within a NULLIF function.
7 sty 2022 · In SQL Server, the NULLIF() expression checks the value of two specified expressions. It returns a null value if they’re equal, otherwise it returns the first expression. Syntax. The syntax goes like this: NULLIF ( expression , expression ) Example. Here’s an example to demonstrate: SELECT NULLIF(3, 3); Result: NULL
