chore: add resource under postgresql-dba:rdbms-concepts:object-model:tables

src/data/roadmaps/postgresql-dba/content/102-rdbms-concepts/100-object-model/101-tables.md

@@ -72,4 +72,6 @@ DROP TABLE table_name;
 
 Be cautious when using this command, as there's no way to recover a table once it's dropped.
 
-By understanding the basics of creating, modifying, and deleting tables in PostgreSQL, you now have a solid foundation to build your database and store data in a structured manner.
+By understanding the basics of creating, modifying, and deleting tables in PostgreSQL, you now have a solid foundation to build your database and store data in a structured manner.
+
+- [Table Basics](https://www.postgresql.org/docs/current/ddl-basics.html)