Is automatic increment of primary key values supported in all types of database management systems?

Automatic increment of primary key values (auto-increment) is not supported equally across all database management systems (DBMS). For example, MySQL and PostgreSQL have built-in mechanisms for auto-increment (AUTO_INCREMENT in MySQL, SERIAL or IDENTITY in PostgreSQL). In Oracle, sequences (SEQUENCE) and triggers are often used for this purpose, as there is no direct auto-increment.

Therefore, approaches to automatically increasing the key value depend on the specific DBMS, and not all DBMS support auto-increment "out of the box". When developing, it is necessary to consider the features of the chosen DBMS and use the appropriate mechanisms.