Apart from using COALESCE (), there are 2 other ways to replace NULL values in SQL Server. Let's understand this with an example. I have a Table tblEmployee, as shown in the diagram below. Some of the ...

Sometimes, you may want to replace NULL values with a different value, such as a default value, a zero, or a blank. You can use the COALESCE function to do this, which returns the first non-NULL ...

Learn how to optimize SQL queries for NULL values by following some best practices and techniques, such as using IS NULL or IS NOT NULL operators, avoiding NOT IN with NULL values, and more.