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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.
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)
8 maj 2022 · SQL NULLIF () Explained. 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 argument. NULLIF() is a SQL-standard feature (it’s included in the ISO/IEC 9075 specification).
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.
Transact-SQL syntax conventions. Syntax NULLIF ( expression , expression ) Arguments. expression Is any valid scalar expression. Return Types. Returns the same type as the first expression. 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 ...
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.
