本文档描述了SQL中多维数组的定义和使用。多维数组代表了多种科学和工程数据的核心底层结构。因此，如今人们普遍认为，阵列在大数据中起着至关重要的作用，应该成为信息系统中整体数据类型编排的一个组成部分。本文档讨论了ISO/IEC 9075-15中定义的MD数组数据类型上操作的语法和语义。

This document describes the definition and use of multidimensional arrays in SQL. Multidimensional arrays represent a core underlying structure of manifold science and engineering data. It is generally recognized today, therefore, that arrays have an essential role in Big Data and should become an integral part of the overall data type orchestration in information systems. This document discusses the syntax and semantics of operations on the MD-array data type defined in ISO/IEC 9075-15.