MySql 中文参考指南
Chapter 28 INFORMATION_SCHEMA Tables
目录
Table of Contents
_INFORMATION_SCHEMA_提供对数据库元数据的访问，提供有关 MySQL 服务器的信息，例如数据库或表的名称、列的数据类型或访问权限。有时用于此信息的其它术语是数据字典和系统目录。
INFORMATION_SCHEMA provides access to database metadata, information about the MySQL server such as the name of a database or table, the data type of a column, or access privileges. Other terms that are sometimes used for this information are data dictionary and system catalog.