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.
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