The result would be: Because SQL:2003 defines all Null markers as being unequal to one another, a special definition was required in order to group Nulls together when performing certain operations.
結果是： 由於 SQL：2003將所有 Null標記定義為彼此不相等，因此需要特殊定義才能在執行某些操作時將 Null分組在一起。