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1·In this regard, the query is similar to a left outer join in SQL.

从这种意义上说，查询与 SQL 中的左外连接相似。

2·Figure 8 shows that the left outer join operations are cascaded if a rule USES more than one reference column.

图8展示了如果规则使用了多个参考列，那么左外部连接就进行级联。

3·The combined record is much easier to use-you only have to check the PICTURE field to see if it's not null (which was the result of the LEFT OUTER JOIN).

而组合的记录使用起来要容易得多—只需检查PICTURE字段，查看它是否为空(这是LEFT OUTER JOIN的结果)。

4·The following illustration shows a conceptual view of two sets and the elements within those sets that are included in either an inner join or a left outer join.

下面的概念图显示了两个集合中的完整项目，以及这两个集合彼此进行内部联结或左外部联结之后剩下的项目。

5·A left outer join is a join in which each element of the first collection is returned, regardless of whether it has any correlated elements in the second collection.

左外部联接是这样一个联接：在其中返回第一个集合的每个元素，而无论该元素在第二个集合中是否具有相关元素。

6·When you select an option to create an outer join, the diamond graphic in the join line changes to indicate that the join is a left outer, right outer, or full outer join.

当选择创建外部联接的选项时，联接线中的菱形图会改变，以指示联接是左外部联接、右外部联接还是完全外部联接。

7·Outer join in which all rows from the table represented on the left will be included, even if they do not have matches in the related table.

外部联结，将包括右边资料表的所有资料列，即使该资料列在相关资料表中并没有相符项目。