Sublanguage

DML is considered a sublanguage of SQL. It's concerned with manipulating data stored in the database. DML consists of four commonly used statements: INSERT, UPDATE, DELETE, and MERGE.

the sublanguage of weather bulletins

We define sublanguage here as the particular language used in a body of texts dealing with a circumscribed subject area (often reports or articles on a technical speciality or science subfield), in which the authors share a common vocabulary and common habits of word usage.

Sublanguages are usually taken from science and technology domains and are restricted to a particular topic.