A similar technique is used when applying the unique filter to the outer query, with dot notation used to indicate the field by which results are to be filtered.

在对外部查询应用惟一筛选器时可使用类似的技术，点符号将用于说明筛选结果所依据的字段。

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Outer joins may have a negative impact on query performance.

外部连接可能会对查询性能产生负面影响。

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Since the OUTER of this NLJOIN, TBSCAN (2), is applying local predicates, you must also add the predicates to the count query.

因为该NLJOIN的outer即t BS CAN(2)应用于局部断言，必须将该断言增加到计数查询。

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