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.

Therefore, using NULL should be a conscious decision, not a default choice. Ultimately, your qualification to use NULL in SQL depends on your understanding of its nuances and your ability to implement ...

We're developing against SQLite, but when I go to add a NOT NULL column with no default specified, I get an error. I was attempting to add a foreign key originally, but it seems there's conflicting ...

IS NULL and IS MISSING are predicates that test for a missing value. IS NULL and IS MISSING are used in the WHERE, ON, and HAVING expressions. Each predicate resolves to true if the sql-expression's ...

Motivation This proposal is to improve handling of null values in druid by treating nulls as missing values which don’t actually exist. This will make it more compatible to SQL standard and help wi ...

So I have a method:int Foo()It either returns a value if successful or NULL if not. If I'm not mistaken, if I try something like:int bar; bar = Foo();and Foo() returns NULL, then my program will ...