NULL values are special. For instance, a comparison between two NULL values, or even a comparison between a NULL value and a non-value, will always be false. This is because NULL values aren’t real values as such, but rather “unknowns”.
sql
mssql
FoldFold allExpandExpand allAre you sure you want to delete this link?Are you sure you want to delete this tag?
The personal, minimalist, super fast, database-free, bookmarking service by the Shaarli community
