Missing join predicates, but only if a foreign key is defined.
丢失连接谓词，只在定义了外键的情况下。
Initially create a join from the dimension's primary key, to the fake fact key.
首先创建维度的主键到伪事实键的连接。
The example USES the ID column as the join key.
示例使用id列作为连接键。
The third part: City public space join design principle and method of key in combining.
第三部分：城市公共空间整合中连接键的设计原则和方法。
The join of all transport means is a key issue in combined transportation.
联合运输中各种运输方式衔接是关键问题。
The join of all transport means is a key issue in combined transportation.
联合运输中各种运输方式衔接是关键问题。
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