I'm adding a table and subclass table to my DB. (Subclass table = table where the primary key joins to the primary key of another table, to give extra row ...

Modern relational database features in PostgreSQL include complex queries, foreign keys, triggers, updatable views, ... To execute SQL commands and queries, add a semicolon (;) ...

Real-world relational databases have tables that contain fields, constraints, and triggers, and tables are related through foreign keys. SQL is used to declare the data to be returned, and a SQL ...