NULL is a fickle beast, and for the people not accustomed to how it works in SQL, it can create many problems (read: incorrect data output). This is especially true for those coming from ...

NewDateValue NULL Logical Functions The next grouping of new T-SQL commands is logical functions; they include two new commands, CHOOSE and IIF. These commands are used for logical operations to help ...

Uncommon SQL errors: aggregate functions without GROUP BY and NULL handling in aggregations. Leads to inaccurate data aggregation and possibly wrong business decisions.