合并连接的特点是:需要Join的记录必须分布到单节点上去才能进行;对每张表只读取一次;比乘积连接(Product Join)的效率要高;在没有更好的优化方式时,它是一种比较通用的方法。
基于16个网页-相关网页
Join the webinar to learn how the product works and see a live demo of the integration.
加入webinar,了解产品如何工作,并看看一个集成的生动演示。
The Oracle (+) outer and cross join syntax is directly mapped to the DB2 database product.
Oracle(+)外连接和交叉连接语法被直接映射到DB 2数据库产品。
It has some very nice features. The product handles lists better than most other word processors, allowing you to join or split items.
他有几个很好的特点,改产品在处理列表时优于其它的文字处理工具,允许你加入或划分条目。
"When a farmer elects to join the insurance, we sell the product on wholesale so that the premium is reduced, so that he doesn'tt feel it, so that it cushions him and I've also sold the product."
VOA: special.2010.05.11
And I actually think it's probably important for anybody who wants to do a startup, anybody who wants to join a place like Microsoft and work on an established or a new product.
实际上我想这对任何想创业的人,来说应该都很重要,任何想加入微软这样的公司,为新老产品工作的人都是这样。
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