You join two tables by using an inner join or an outer join.
可以通过使用内连接或外连接来连接两个表。
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。
In these cases, keep in mind that the local processing of a full outer join may also impact performance.
这种情况下，请记住，完全外连接的本地化处理也会影响性能。
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。
The merge statement first does a join (outer join or inner join, depending on the merge statement) between source and target table rows.
merge语句首先进行(外部联接或者内部联接，取决于merge语句)源与目标表行之间的联接。
An outer join can be further restricted by using a predicate.
使用谓词可以进一步限定外部联接。
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。
For example, using SQL to create a multi-table outer join that outputs its results to a new XML document is much more complicated to the average developer than writing XQuery.
比方说，对于一般开发人员，使用SQL创建输出结果为新xml文档的多表外连接查询要比编写XQuery复杂得多。
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。
The fact that this is also called an INNER JOIN might also indicate that an alternative called OUTER JOIN exists.
这也被称为INNERJOIN，这一事实也表明有另一种称作OUTER JOIN的类型存在。
(+) join syntax this syntax is actually discouraged even by Oracle, but there are numerous applications and developers who still use this form of OUTER join syntax.
(+)连接语法这种语法实际上甚至连Oracle都不提倡了，但是有很多应用程序和开发人员仍在使用这种形式的OUTER join语法。
(+) join syntax this syntax is actually discouraged even by Oracle, but there are numerous applications and developers who still use this form of OUTER join syntax.
(+)连接语法这种语法实际上甚至连Oracle都不提倡了，但是有很多应用程序和开发人员仍在使用这种形式的OUTER join语法。
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