Is not null sql example Most columns in SQL databases allow NULL values by default unless the NOT NULL constraint is used to specify otherwise. Note: The NOT EQUAL comparison is case-sensitive for strings. Let’s take some examples of using the ISNULL() function. sqlCopy codeSELECT COALESCE(A. USE AdventureWorks2022; GO SELECT Name, Weight FROM Production. The CASE expression goes through conditions and returns a value when the first condition is met (like an if-then-else statement). Example: Select * from StudentsInfo WHERE ContactPhone IS NOT NULL. IS NOT NULL; The SQL IS NOT NULL Operator. If you want to check if a value is. For example, the “ EMPID ” will not accept NULL values when the EMPLOYEES table is created because NOT NULL constraints are used with these columns. gsojhhhleisideyxofhtdnewkteliznrodoclbkukgusbwkxewljjlicwnazkwxlpgldgvr