Czy możesz napisać algebrę relacyjną w zapytaniach SQL
σ topic = "Database" (Tutorials)
Cooperative Caracal
σ topic = "Database" (Tutorials)Relational Algebra is a theoretical model which is the fundamental block for SQL. It comprises different mathematics operations.
Operations are divided into two main categories: Basic and Derived.
Basic Consist of six Operations: SELECT, PROJECT, UNION, SET DIFFERENCE, CARTESIAN PRODUCT, RENAME.
Derived Consist of three Operations: JOINS, INTERSECTION, DIVISION.