UDT

UDT stands for 'User-Defined Types'

• In the context of databases this term refers to the definition of new/own dataypes at the database level. Although not native to the database, these UDTs can be used in SQL statements as if they are native. The definition of the UDT structures and associated logic is done in a programming language (e.g. the C programming language for the PostgresSQL database management system)