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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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For example, SELECT NULLIF(4,4) AS Same, NULLIF(5,7) AS Different; returns NULL for the first column (4 and 4) because the two input values are the same. The second column returns the first value (5) because the two input values are different.
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.
14 maj 2009 · SELECT COALESCE(dividend / NULLIF(divisor,0), 0) FROM sometable NULLIF(divisor,0) will return NULL if divisor is 0. In SQL, dividing by NULL returns NULL. The COALESCE function will then replaces the resulting NULL with 0.
10 cze 2023 · The SQL NULLIF function lets you compare two values and determine if they match or not: Match? The function will return NULL. Don’t match? The function will return the first value. Syntax and Parameters. The syntax of the SQL NULLIF function is: NULLIF (expr1, expr2) The parameters of the NULLIF function are:
NULLIF (Transact-SQL) \n [!INCLUDE sql-asdb-asdbmi-asa-pdw-fabricse-fabricdw] \n. Returns a null value if the two specified expressions are equal. For example, SELECT NULLIF(4,4) AS Same, NULLIF(5,7) AS Different; returns NULL for the first column (4 and 4) because the two input values are the same. The second column returns the first value (5 ...
