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The ISNULL() function returns a specified value if the expression is NULL. If the expression is NOT NULL, this function returns the expression. Syntax
SQL Server ISNULL() function overview. The SQL Server ISNULL() function replaces NULL with a specified value. The following shows the syntax of the ISNULL() function: ISNULL(expression, replacement) Code language: SQL (Structured Query Language) (sql) The ISNULL() function accepts two arguments: expression is an expression of any type that is ...
You can use the ISNULL() function to specify a hard-coded value or even use another column in the table for the join condition. Below is an example that shows how you can return the personal address of a person and if that does not exist return their business address.
3 wrz 2024 · The following example uses ISNULL to replace a NULL value for Color, with the string None. USE AdventureWorks2022; GO SELECT ProductID, Name, ProductNumber, ISNULL(Color, 'None') AS Color FROM Production.Product; Here's a partial result set.
Here is the basic syntax of the ISNULL function: ISNULL(expression, replacement_value) expression: This is the value that you want to check for NULL. If this value is NULL, the function will return the specified replacement value.
24 mar 2024 · The syntax of ISNULL. The ISNULL function is meant to return a non- NULL value in places where NULL may occur. Here is the general syntax: ISNULL(<expression>,<replaceer_value>) The idea is that if the <expression> passed in evaluates to NULL, the <replacer_value> is returned.
10 maj 2019 · The syntax for the SQL ISNULL function is as follow. SQL Server ISNULL (expression, replacement) Expression: In this parameter, we specify the expression in which we need to check NULL values. Replacement: We want to replace the NULL with a specific value. We need to specify replacement value here.
