Google (www.google.com) is a search engine that is found in September 1998 by two Stanford University, in September 1998, Google Inc. founded in 1999. In July 2000, Google replaced INKTOMI became the search engine of Yahoo, in September of the same year, Google became the search engine of China Netease. Since 1998, Google has already received more than 30 industry awards. To Google's News Center (http://www.google.com/press/index.html), you can find history and news information about Google.
Search
For the first time I entered Google, it determines the language interface according to your operating system. What needs to be reminded is that Google is stored by cookie, so if your system disables cookie, you cannot set up your Google interface.
Google's homepage is very refreshing, LOGO, the four functional modules are arranged: websites, images, newsgroups, and directory services. By default is the website search. Now in the first search practice, assume that you are a newcomer, you want to find out the search engine's whalery and search skills. Enter a keyword "Search Engine" in the search box, select the Search Chinese (Simplified) page "option, then click the" Google Search "button below (or go directly), the result is coming out.
Note: The quotation marks outside the search syntax in the article only enters the reference role and cannot be brought into the search bar.
Grade search
In the above example, a single keyword "search engine", the search information is like smoke, and most of them do not meet their own requirements, what should I do? We need to further narrow the search scope and results.
1. The search results are required to include two and more than two keywords.
The general search engine needs to be added between multiple keywords "", and Google does not need to use the plaintext "" to represent the logic "and" operation, as long as the space is OK. Now, we need to understand the history of search engines, so we hope that there are two keywords on "Search Engine" and "History" on the webpage.
Example: Search all Chinese webpages containing keyword "search engines" and "history"
Search: "Search Engine History"
RESULTS: Chinese (Simplified) webpage for search engine history has been searched. There are about 78,600 query results, which is 1-10. Search for 0.36 seconds.
With two keywords, the results of the query have been reduced from more than 70,000 items. However, check the search results, find that most of the results in the forefront still do not meet the requirements, most of the "history" involved in the web page is not what we need "Search Engine". How to do it? Delete "history" that is not related to the search engine. We found that this part of the useful information is always related to "culture", and some common words are "Chinese history", "world history", "historical books".
2. Search results are required to contain certain specific information
Google uses a minus "-" to represent the logic "non" operation. "A -b" means searching for a web page containing A but no B.
Example: Search all Chinese webpages that contain "Search Engine" and "History" but does not include "culture", "Chinese history" and "world history"
Search: "Search Engine History - Culture - China History - World History"
RESULTS: Searching Engine History - Culture - Chinese History - World History of Chinese (Simplified) page. There are about 36,800 query results, which is 1-10. Search for 0.22 seconds.
We see that the search results have been reduced by nearly half by removing disrelated information. The first search result is:
Search Engine Expansion ≡ Search Engine Development History
Search engine traffic, ... search engine professional introduction site. ... www.se-express.com/about/about.htm - 14k - Web Snapshot - Similar web
Very compliant with search requirements. In addition, the eighth search results:
463 search king
This site retrieves the entire website here to enter keywords. Your current
Location: Home >> Internet Search Handbook >> The history of the search engine. ...
Www.cnco.net/search/history.htm - 21K - Web Snapshot - Similar Webpage
Also in line with search requirements. However, 10 results have only two meetings, and there is not too little. However, before you don't have a better strategy, you may wish to open a result. Pinbook's page named "Search Engine Development History", we found that the history of search engines is closely related to the earlier file search tool "Archie". In addition, the search engine seems to have a core program called "spider", and the earliest forming search engine is "lycos", making the search engine deep into the hearts of "Yahoo". Understand this information, we can further allow the search results to meet the requirements.
Note: "" and "-" here are English characters, not " " and "-" of Chinese characters. In addition, between the operator and the keyword, there is no space. For example, "Search Engine - Culture", the search engine will be deemed as the keyword "Search Engine" and "Culture" logic "and" operation "-" ignored.
6.3, the search results contain at least one of multiple keywords.
Google uses uppercase "OR" represents logic "or" operation. Search for "a or b", means saying, searchable, either, either B, or there are A and B. In the above example, we hope that the search results contain one or several of the keywords such as "Archie", "Lycos", "Spider", which can be further streamlined.
Example: Searching for the following web page, you must contain "Search Engine" and "History", no "culture", you can contain any one or more people in the keyword: "Archie", "Spider", "Lycos", "Yahoo" ".
Search: "Search Engine History Archie or Spider Or Lycos Or Yahoo - Culture"
RESULTS: Searched Search Engine History Archie or Spider or Lycos Or Yahoo - Culture's Chinese (Simplified) web page. There are about 8,400 query results, which is 1-10. Search for 0.16 seconds.
We see that the search results are reduced to more than 8,000, and most of the top 20 results are in line with search requirements. If you want to know the history of search engines, you may wish to study the results found now.
Note: "Continue" or "instead of lowercase" OR "instead of lowercase" OR "instead of lowercase.
In the above example, I introduced the most basic syntax of the search engine "and" Non "and" or ", these three search syntax google use" "(space)," - ", and" or ". On the way, you can also understand how to narrow the search range, quickly find the general method of the purpose of the purpose: the target information must contain the keyword ("connected), the target information cannot contain keywords (with" - "Remove), the target information may contain keywords (connect with" OR ").
7, miscellaneous syntax
7.1, wildcard problem
Many search engines support wildcard symbols, such as "*" represent a series of characters, "?" Represents a single character. Google supports the wildcard support. It is currently only "*" to replace individual characters and contains "*" must use "". For example, "" Take * Governing the Country ", indicating the first four phrases" to ", the end of the" governing "," * "can be any character. 7.2, keyword letter case
Google is the same as the results of English characters, "god" and "god" search results.
7.3, search the entire phrase or sentence
The keyword of Google can be a word (there is no space in the middle) or a phrase (there are spaces in the middle). However, use a phrase to make a keyword, you must add English quotes, otherwise space will be treated as a "and" operator.
Example: Search for English information about the first World War.
Search: "World War i" "
RESULTS: "World War I" has been searched to the Internet. There are about 937,000 query results, which is 1-10. Search for 0.06 seconds.
7.4, search engines ignored characters and forced search
Google has high frequency English words, such as "I", "COM", "WWW", etc., and some symbols such as "*", ".", Etc., ignore processing.
Example: Search for some historical information about WWW origins.
Search: "History of Www"
RESULTS: The following words are too frequent, not included in the search: WWW. Searched Chinese (Simplified) webpage for WWW history Internet. There are about 75,100 query results, which is 1-10. Search for 0.22 seconds.
We see, search for "Historical Internet", but the search engine will omit "WWW" and "". So the above search only searches for "history" and "Internet". This obviously does not meet the requirements. Here I am using the knowledge of the search engine word. When we search for the "WWW history", the search engine actually divides this phrase into three parts, "WWW", "" "and" history "to retrieve, this is the word of the search engine. So even if you enter a continuous "WWW history", the search engine still retrieves the phrase as three keywords.
If you want to force the ignored keyword, you need to add a " " number in front of the keyword.
Search: " WWW History"
RESULTS: Historical internets for www have been searched. There are about 25,000 query results in total, which is 1-10. Search for 0.05 seconds.
Another way to force search is to cause the keyword described above in English. In the previous example "World War I", "I" is actually ignoring the word, but because the search engine enforces this specific phrase because the English double quotes are caused by English dual quotes.
Search: "" Www history "Internet"
RESULTS: The Chinese (Simplified) web page for "WWW" Internet. There are about 7 query results in total, which is item 1-6. Search for 0.26 seconds.
We see that this search is in fact using the "WWW's history" as a complete keyword. Obviously, the page containing such a specific phrase is not a lot, but each item is very in line with the requirements.
Note: Most commonly used English symbols (such as question mark, number, comma, etc.) cannot be a search keyword, and it is not possible to strengthen.
8, advanced search
Some of Google's most basic search syntax has been explored. Usually, these simple search syntax can solve most of the problems. However, if you want more quickly and more accurately, you need to know more things. 8.1, restrictions on searching websites
"Site" indicates that the search results are limited to a specific website or website channel, such as "www.sina.com.cn", "edu.sina.com.cn", or a domain name, such as "com.cn", "COM", etc. If you want to exclude a website or domain name, you only need to use "- Website / Domain".
Example: The famous IT portal ZDNET and CNET searches for information about search engine skills.
Search: "Search Engine" Tips Site: www.zdnet.com or site: www.cnet.com "
RESULTS: Searched to search for "Search Engine" Tips or Site: www.cnet.com in www.zdnet.com. There are about 1,040 query results, which is 1-10 items. Search for 0.09 seconds.
Note that there is a small bug in Google here. "Search in www.zdnet.com ...", it should be expressed "" Has search in www.zdnet.com and www.cnet.com. "
Example: Search for information about search engine skills in Sina Technology Channel.
Search: "Search Engine Skills Site: Tech.sina.com.cn"
RESULTS: Chinese (Simplified) webpage on search engine skills has been searched in Tech.sina.com. There are about 163 query results, which is 1-10 items. Search for 0.07 seconds.
Note: The colon after the Site is English characters, and, there is no space after the colon, otherwise, "Site:" will be used as a search key. In addition, the website domain name cannot have an "http: //" prefix, and there is no "/" directory suffix; the website channel is only limited to the "channel name. Domain name" mode, and cannot be a "domain name / channel name" mode.
8.2, find information in a certain type of file
"FileType:" is a very powerful and practical search syntax developed by Google. That is, Google can also search for some binary documents not only search for a general text page. At present, Google already retrieves Microsoft's Office document such as .xls, .ppt, .doc, .rtf, WordPerfect document, Lotus1-2-3 document, Adobe's .pdf document, Shockwave's .swf document (Flash animation), etc. The most practical document search is a PDF search. PDF is the electronic document format developed by Adobe, and now has become an electronic publishing standard for the Internet. At present, Google retrieved PDF documents is about 25 million, accounting for about 80% of the number of binary documents of all indexes. PDF documents are usually some graphic comprehensively documentation, providing information generally comprehensively comprehensively.
Example: Search for Office documents of several balance sheets.
Search: "Quality of Bunder Filety: Doc or FileType: XLS or FileType: PPT"
RESULTS: The Chinese (Simplified) web page for the balance sheet FILETYPE: DOC OR FILETYPE: XLS or FileType: PPT. There are about 481 query results, which is 1-10. Search for 0.04 seconds.
Note that the downloaded Office file may contain macro viruses, cautiously.
Example: Searches some PDF documents regarding search engine knowledge and skills
Search: "Search Engine" Tips or Tutorial FileType: PDF "Result:" Search Engine "Tips or Tutorial FileType: PDF has been searched to the Internet. There are about 12,600 query results, which is 1-10. Search for 0.22 seconds.
Let's look at one of the results:
[PDF] Search Engines TIPS
Document Type: PDF / Adobe Acrobat - HTML
... http://www.google.com/press/zeitgeist.html See What People Are Searching on at Google.com
* Search Engine Watch http://searchenginewatch.com/ Some Free Tips ...
Www.allvertage.com/promokits/searchenginetips.pdf - Similar web
It can be seen that Google uses [PDF] to mark this is a PDF document retrieval, and it also gives the HTML version of the PDF document, which retains the text content and structure of the document, but there is no picture.
8.3, the keyword search is included in the URL link
The "InURL" syntax returned to the web link contains the first keyword, and the keyword behind will appear in the link or in the web document. There are many websites to display a certain type of resource names in the directory name or web name, such as "MP3", "gallary", etc., so you can find these related resource links with Inout syntax, then use the second Key words determine if there is a specific information. The biggest difference between InURL syntax and basic search syntax is that the former can usually provide very accurate topic.
