SQL澳门比分网址表

NuoDB system tables are tables that exist in the NuoDB SYSTEM schema. They are used internally for NuoDB operations, however in many cases they can provide useful information to the NuoDB user, such as schema metadata information.

澳门比分网址表分为三类:

类别 描述

SYSTEM Persistent Tables

Tables that are durable and stored in the NuoDB database in the SYSTEM schema. These tables may or may not have indexes defined.

意见

SQL views generated from SYSTEM tables.

SYSTEM Pseudo Tables

由NOODB进程动态生成的信息并呈现为SQL表,即您可以使用伪表格,例如查询和连接,但伪表实际上并不持续在NOODB数据库中。

Client applications should never contain code that accesses SYSTEM pseudo tables as they are subject to, and furthermore likely to, change from release to release.