* [SQL Server](https://learn.microsoft.com/en-us/sql/relational-databases/user-defined-functions/create-user-defined-functions-database-engine?view=sql-server-ver16) * [MariaDB](https://mariadb.com/kb/en/create-function/) * [BigQuery](https://cloud.google.com/bigquery/docs/reference/standard-sql/user-defined-functions)
