Another technique to optimize SQL queries for NULL values is to create indexes on columns that have few or no NULL values. Indexes can help you speed up your queries by reducing the number of rows ...

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 some default or alternative values in your SQL queries. For example, you may want to calculate the average rating of a product, but some ratings ...