云数据仓库ADB内表字段定义not null有影响吗？not null会导致已经导入的数据逐渐减少吗？create table catalog_returns( cr_returned_date_sk bigint, cr_returned_time_sk bigint, cr_item_sk bi...

云数据仓库ADBINFORMATION_SCHEMA. TABLES 元数据库的数据是实时更新吗？

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云原生数据仓库AnalyticDB MySQL版

云原生数据仓库 AnalyticDB MySQL版是一种支持高并发低延时查询的新一代云原生数据仓库，全面兼容MySQL协议以及SQL：2003 语法标准，可以对海量数据进行即时的多维分析透视和业务探索，快速构建企业云上数据仓库。

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