join on

基本解释

Each leg of the union does a two-table join on one of the sources.
union 的每个分支在某一个数据源上进行一个二表连接。
They're considerably slower than a join on a relational database, but, as a result, it is much harder to create a query that overwhelms the data store.
这要比关系数据库上的连接慢得多，因此很难创建一个让数据存储超负荷的查询。
Let me know if you decide to join in on this little project, “Save Timmy.” I’ll add your link to the bottom at the bottom of this article.
如果你已经决定加入这个并不很起眼的活动，“拯救蒂米”，请让我知道，我会把你的链接放在文章最后。

Im Faith Lapidus. Join us again next week for another People in America program on the Voice of America.
And you can join on to the Red Sox nation on top of that, and part of being a good Red Sox fan is knowing the statistics of your team.
除此之外你们可以,加入红袜队的国度，作为一个好的红袜队球迷,也是了解你们支持球队的,数据的一部分。
麻省理工公开课 - 化学原理课程节选
We are so glad that you're with us, so glad you can join us here today on the Inner Core.
真高兴你今天能，做客我们人性节目。
普林斯顿公开课 - 人性课程节选

If all goes well, the new members will join on May 1st, 2004.
ECONOMIST: After the EU summit