| Subject | English | Chinese simplified |
| comp., MS | data definition | 数据定义 (The attributes, properties, and objects in a database) |
| comp., MS | data definition language | 数据定义语言 (A language that defines all attributes and properties of a database, especially record layouts, field definitions, key fields, file locations, and storage strategy) |
| comp., MS | data-definition query | 数据定义查询 (An SQL-specific query that contains data definition language (DDL) statements. These statements allow you to create or alter objects in the database) |