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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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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.
This tutorial introduces you to the SQL NULLIF function and shows you how to add the if-else condition to your SQL queries.
SQL Server NULLIF expression overview. The NULLIF expression accepts two arguments and returns NULL if two arguments are equal. Otherwise, it returns the first expression. The following shows the syntax of the NULLIF expression: NULLIF(expression1, expression2) Code language: SQL (Structured Query Language) (sql)
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.
8 maj 2022 · NULLIF() is a SQL-standard feature (it’s included in the ISO/IEC 9075 specification). 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
The NULLIF function takes two arguments. If the two arguments are equal, then NULL is returned. Otherwise, the first argument is returned. The syntax for NULLIF is as follows: We want to show NULL if actual sales is equal to sales goal, and show actual sales if the two are different.
