Review 3:Bags Model SQL,the most important query language for relational databases is actually a bag language. SOL will eliminate duplicates,but usually only if you ask it to do so explicitly. Some operations,like projection, are much more efficient on bags than sets.Review 3: Bags Model „ SQL, the most important query language for relational databases is actually a bag language. „ SQL will eliminate duplicates, but usually only if you ask it to do so explicitly. „ Some operations, like projection, are much more efficient on bags than sets