ISO/IEC 9075的这一部分定义了SQL数据的数据结构和基本操作。它提供了创建、访问、维护、控制和保护SQL数据的功能。ISO/IEC 9075的这一部分规定了数据库语言的语法和语义:用于指定和修改SQL数据的结构和完整性约束；用于声明和调用SQL数据和游标上的操作；用于声明数据库语言过程。它还指定了一个描述SQL结构和完整性约束的信息模式- 数据ISO/IEC 9075的这一部分为SQL实现之间的数据定义和编译单元的可移植性提供了工具。ISO/IEC 9075的这一部分提供了SQL实现互连的工具。ISO/IEC 9075的这一部分没有定义数据库管理系统组件、SQL数据定义声明、SQL过程或编译单元之间的绑定方法或时间。ISO/IEC 9075本部分的实现可能存在于也支持应用程序编程语言的环境中- 用户查询语言、报表生成器系统、数据字典系统、程序库系统和分布式通信系统，以及用于数据库设计、数据管理和性能优化的各种工具。

This part of ISO/IEC 9075 defines the data structures and basic operations on SQL-data. It provides functional capabilities for creating, accessing, maintaining, controlling, and protecting SQL-data.This part of ISO/IEC 9075 specifies the syntax and semantics of a database language: For specifying and modifying the structure and the integrity constraints of SQL-data; For declaring and invoking operations on SQL-data and cursors; For declaring database language procedures. It also specifies an Information Schema that describes the structure and the integrity constraints of SQL-data.This part of ISO/IEC 9075 provides a vehicle for portability of data definitions and compilation units between SQL-implementations.This part of ISO/IEC 9075 provides a vehicle for interconnection of SQL-implementations.This part of ISO/IEC 9075 does not define the method or time of binding between any of: database management system components, SQL data definition declarations, SQL procedures, or compilation units.Implementations of this part of ISO/IEC 9075 may exist in environments that also support application programming languages, end-user query languages, report generator systems, data dictionary systems, program library systems, and distributed communication systems, as well as various tools for database design, data administration, and performance optimization.