I was interested reading a post on the MVP group about DISTINCT FROM by Erland who was championing the IS DISTINCT FROM clause but had found a work around using INTERSECT. That led me to I dig into ansi and non ansi_null comparisons and what operators honour the setting and what ignore it. To drive this I was doing a full join to find different rows between two tables. I always thought that setting ansi nulls would solve the problem of comparisons on A.Column = B.column i.e. you could just...(read more)