标准编号：ISO/IEC 9075-2:2011
中文名称：信息技术 数据库语言 SQL 第2部分：基本原则（SQL/基本原则）
英文名称：Information technology — Database languages — SQL — Part 2: Foundation (SQL/Foundation)
发布日期：2011-12
标准范围
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.— For embedding SQL-statements in a compilation unit that is otherwise written in a particular programming language (host language).— For deriving an equivalent compilation unit in the host language. In that equivalent compilation unit, each embedded SQL-statement has been replaced by one or more statements in the host language, some of which invoke an SQL externally-invoked procedure that, when executed, has an effect equivalent to executing the SQL-statement.— For direct invocation of SQL-statements.— To support dynamic preparation and execution of SQL-statements.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.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.
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