手册SQL数组的相关内容

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云数据库 SelectDB 版通过集群粒度实现算力隔离，多个集群可以分别用于不同的工作负载（例如读写数据），以满足各个业务的不同性能规模和使用时长需求。本文介绍如何在云数据库 SelectDB 版实例中新建集群。

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文章 2018-10-02 来自：开发者社区

PostgreSQL 10.1 手册_部分 II. SQL 语言_第 9 章函数和操作符_9.18. 数组函数和操作符

9.18. 数组函数和操作符表 9.48显示了可以用于数组类型的操作符。表 9.48. 数组操作符操作符描述例子结果 = 等于 ARRAY[1.1,2.1,3.1]::int[] = ARRAY[1,2,3] t <> 不等于 ARRAY[1,2,3] <> ARRAY[1,2,4] t < 小于 ARRAY[1,2...

文章 2018-10-02 来自：开发者社区

PostgreSQL 10.1 手册_部分 II. SQL 语言_第 8 章数据类型_8.15. 数组

8.15. 数组 8.15.1. 数组类型的定义 8.15.2. 数组值输入 8.15.3. 访问数组 8.15.4. 修改数组 8.15.5. 在数组中搜索 8.15.6. 数组输入和输出语法 PostgreSQL允许一个表中的列定义为变长多维数组。可以创建任何内建或用户定义的基类、枚举类型或组合类型的数组。域的数组目前还不支持。 8.15.1. 数组类型的定义为了展示数...

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