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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
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;
18 mar 2021 · 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.
SQL Server ISNULL() function examples. Let’s take some examples of using the ISNULL() function. Using SQL Server ISNULL() function with the numeric data example. This example uses the ISNULL() function to return the second argument because the first argument is NULL: SELECT ISNULL (NULL, 20) result; Code language: SQL (Structured Query ...
Use the LEN function to check for null or empty values. You can just use LEN(@SomeVarcharParm) > 0. This will return false if the value is NULL, '', or ' '. This is because LEN(NULL) returns NULL and NULL > 0 returns false. Also, LEN(' ') returns 0. See for yourself run:
2 wrz 2024 · The ISNULL() function in SQL Server is a powerful tool for handling NULL values in our database queries. It allows us to replace NULL values with a specified replacement value, ensuring that your queries return meaningful results even when data is missing.
10 maj 2019 · We can use SQL ISNULL to replace existing NULL values with a specific value. For example, we want to return Employee salary 10,000 if it is NULL in the Employee table. In the following query, we used SQL ISNULL function to replace the value.
