
PostgreSQL includes several procedural languages with the base distribution: [PL/pgSQL](https://www.postgresql.org/docs/current/plpgsql.html "Chapter 41. PL/pgSQL — SQL Procedural Language"), [PL/Tcl](https://www.postgresql.org/docs/current/pltcl.html "Chapter 42. PL/Tcl — Tcl Procedural Language"), [PL/Perl](https://www.postgresql.org/docs/current/plperl.html "Chapter 43. PL/Perl — Perl Procedural Language"), and [PL/Python](https://www.postgresql.org/docs/current/plpython.html "Chapter 44. PL/Python — Python Procedural Language").

In addition, there are a number of procedural languages that are developed and maintained outside the core PostgreSQL distribution. A list of [procedural languages](https://wiki.postgresql.org/wiki/PL_Matrix) is maintained on the PostgreSQL wiki. Note that some of these projects are not released under the same license as PostgreSQL. For more information on each procedural language, including licensing information, refer to its website and documentation.

[https://wiki.postgresql.org/wiki/PL\_Matrix](https://wiki.postgresql.org/wiki/PL_Matrix)
