这个查询返回定时的表列数据，理解起来并不难。

This returns regular, tabular data and is not too complicated to understand.

youdao

每个数据库表列都与一个内容类型属性关联。

Each database table column is associated with a content type property.

youdao

每个数据库表列都与一个内容类型属性关联。

Each database table column is associated with a content type property.

youdao