This category includes graphical languages such as QBE (Query By Example), implemented in DBMS such as Access, as well as the algebraic language studied in this section. On the other hand, an ...

A interpreter which takes relational algebra expression as input from the user, automatically converts them to SQL queries, executes the queries on the database server, and outputs the results of the ...

The paper proposes a method of parsing for relational algebra expressions, which is based on the use of reverse Polish notation (postfix notation). The operation algorithm of the shunting yard, ...