维度表需要作为主键数据的通用键；这将作为事实表的外键。

A dimension table needs a generalized key as the primary key data; this becomes the foreign key in the fact table.

youdao

Informix的序号很适合作为通用键，并且我非常热衷于在每个维度表中使用序号列。

Informix serial Numbers work really well as generalized keys, and I am a fan of using a serial number column on all dimension tables.

youdao

为基于主键、外键和索引的通用查询提供访问

Provides access to common queries based on primary keys, foreign keys, and indexes.

youdao