为了获得这些数据，您可能需要调用Web服务、连接到数据库、执行复杂的逻辑运算或从多个数据源汇总数据。
To obtain this information, you may invoke a Web service, connect to a database, perform complex logic, or aggregate data from multiple sources.
下表汇总了为标准SQL定义的搜索条件运算符。
The following table summarizes search condition operators that are defined for standard SQL.
提供使用运算式而不是预先定义的子句以执行摘要或汇总的步骤。
Provides steps for using expressions to summarize or aggregate rather than using the predefined clauses.
您可以使用自订运算式取代汇总查询中任何位置的汇总函式。
You can use custom expressions in place of aggregate functions anywhere in an aggregate query.
除了使用汇总函式汇总资料以外，您也可以建立自订运算式产生汇总值。
In addition to using aggregate functions to aggregate data, you can create custom expressions to produce aggregate values.
除了使用汇总函式汇总资料以外，您也可以建立自订运算式产生汇总值。
In addition to using aggregate functions to aggregate data, you can create custom expressions to produce aggregate values.
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