• 这样通常可以提高查询性能

    This can improve query performance in general.

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  • 查询结果显示清单8中。

    The result of this query is shown in Listing 8.

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  • 响应发送应答查询信息

    The information to answer the query will be sent in a response.

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  • 获取正在运行查询可执行id

    Get executable ID of the running query.

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  • 查询数据源Yahoo

    The data source for this query is Yahoo!

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  • 更高业务智能样式查询性能

    Improved performance for business intelligence style queries.

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  • 查询其他部分在前面已经解释过了。

    The rest of the query has already been explained.

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  • 现在需要编写一个执行查询函数

    Now, all that's left is to build a function for executing this query.

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  • 当前查询状态stopped

    Currently the status of the query is stopped.

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  • 访问反向文本索引查询访问计划

    Access plan for query accessing an inverted text index.

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  • 2显示了这个查询一个可能计划

    Figure 2 shows a possible plan for this query.

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  • 需要一个进行实际查询XML文件

    You'll also need an XML file to actually query.

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  • 清单2这类查询示例

    Listing 2 is an example of such a query.

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  • 使用反向文本索引查询访问计划

    Access plan for query without inverted text index.

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  • 使用hash索引查询访问计划

    Access plan for query without hash index.

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  • 10可以看到查询预期结果

    You can see the expected result of this query in Figure 10.

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  • 查询结果显示出来

    The results of the query are also shown.

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  • MQT基于一个查询结果定义

    An MQT is a table whose definition is based on the result of a query.

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  • 这个例子查询结果如下

    The result of this example query might look something similar to Listing 23.

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  • 有时这会使查询结构看起来很复杂庞大

    Sometime this makes the query look complex and large in structure.

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  • 但是如果查询数据经常改变怎么办?

    But what if the data you are querying doesn't change very often?

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  • 第三部分详细地解释了所执行查询一步

    The third part is the detailed explanation of every step the query executed.

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  • 查询性能并不

    Performance of this query will not be good.

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  • 包括访问每个查询样本

    A sample that includes queries that access each table.

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  • d将要查询数据库名称

    D is the name of the database that is to be queried.

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  • 判断查询度量

    Determine the set of measures for the query.

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  • 计算昂贵查询性能可以得到改善。

    The performance of queries that are computationally expensive can be improved.

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  • 判断查询切片

    Determine the slice of the query.

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  • 最外面表达式结果就是查询结果。

    The result of the outermost expression is the result of the query.

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  • 1中的信息基于这样查询示例输出

    The information in Table 1 is based on sample output from such a query.

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