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Điều này có thể là một thay thế tốt hơn ngày restrictor hơn so với các nhà điều hành daterange vụng về. Chỉ cần hiểu rằng đây là những chức năng rất khác nhau. Daterange không phải là tương đương tiên tiến-hành cho as_qdr, và không may, không có tương đương với nhà điều hành. | Advanced Operators Chapter 2 71 help you locate pages that have been updated within a certain time frame. For example to find pages that have been updated within the past three months and that contain the word Google use the query http www.google.com search q google as_qdr m3. This might be a better alternative date restrictor than the clumsy daterange operator. Just understand that these are very different functions. Daterange is not the advanced-operator equivalent for as_qdr and unfortunately there is no operator equivalent. If you want to find pages that have been updated within the past year or less you must either use Google advanced search interface or stick as_qdr 3m or equivalent on the end of your URL. The daterange operator must be used with other search terms or advanced operators. It will not return any results when used by itself. Info Show Google s Summary Information The info operator shows the summary information for a site and provides links to other Google searches that might pertain to that site as shown in Figure 2.18.The parameter to this operator must be a valid URL or site name.You can achieve this same functionality by supplying a site name or URL as a search query. Figure 2.18 A Google Info Query s Output If you don t supply a complete URL or hostname Google could return unpredictable results. Just as with the link and cache operators passing an invalid hostname or URL as a parameter to info will submit the query as a phrase search. A search for info linux returns exactly as many results as info linux indicating that Google did indeed treat the info search as a standard phrase search. 72 Chapter 2 Advanced Operators The info operator cannot be used with other operators or search terms. Related Show Related Sites The related operator displays sites that Google has determined are related to a site as shown in Figure 2.19.The parameter to this operator is a valid site name or URL.You can achieve this same functionality by clicking the Similar
