Rails will use a JOIN SQL statement or a strategy in which multiple queries are performed.

Rails将使用一个JOIN sql语句或一个执行多个查询的策略。

youdao

Listing 9 contains the same three-way join SQL statement that was used in Listing 1 to introduce the concept of access paths and query execution.

清单9包含相同的三路联接sql语句，其用在清单1上以介绍访问路径和查询执行的概念。

youdao

Remember that this matches each CD with each artist, producing the equivalent with a SQL join.

记住，这样将匹配每张 CD 和每位艺术家，从而得到相当于 SQL 连接的效果。

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