Inner Join is that type of join which it returns the record that has matching values in both tables. There are mainly three types of join which we have studied about in Extended Operators in Relation Algebra section, i.e., Condition Join, Equi Join, and Natural Join. It is denoted by ...
the operation, and if they do they can usually work around it using left outer join and union. But for teaching relational algebra and SQL, having support for full outer join would make teacher, student and casual user lives a LOT easier ......
Efficient maintenance of materialized outer-join views - Larson, Zhou () Citation Context ... subqueries. [19] has considered view maintenance in the nested relational algebra (NRA), however this has not been widely adopted in any commercial DBMS. Finally, [40] considered temporal views, and ...