...一组连接运算谓词,可以实现自然连接(Natural Join)、内连接(Inner Join)、外连接(Outer Join)、 合并连接 ( Union Join )、交叉连接(Cross Join)等,下面仅介绍自然连接。
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join the Mothers' Union 加入母亲联合会
It is not a end that 10 countries of European Union join, but only a beginning.
欧盟10国家加入不是一个结束,而仅仅是一个开始。
Some cultures are too adept at lining up: a citizen of the former Soviet Union would join a queue just so he could get to the head of that queue and see what everyone was queuing for.
有些文化太善于排队了:前苏联的一个公民会加入队列,只是为了他能排在队伍的前头,看看每个人是为了什么而排队。
Romania and Bulgaria on Monday signed an agreement to join the European Union on January 1, 2007.
罗马尼亚和保加利亚周一签署了一项协议,将于2007年1月1日加入欧盟。
There also was the danger that fighting would cause slave states still in the Union to secede and join the southern Confederacy.
VOA: special.2009.08.06
Nine years later,in eighteen forty-five, the United States Congress passed a resolution inviting the Republic of Texas to join the Union as a state.
VOA: special.2009.02.19
She says Turkey has approved many legal reforms as part of its efforts to join the European Union -- but these have not necessarily been put into action.
VOA: special.2010.06.24
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