Q. What are Boolean operators?

Boolean operators are "AND", "OR", and "NOT". When used with library database (input between keywords), you can make each search more accurate - and save time. Do you like interactive or video tutorials?

AND narrows the search by notifying the database that it is necessary to find all the keywords used in the article to display in the results list. Explanation Combine keywords and AND to search for multiple concepts of interest.

For example, if you are interested in reading articles about political perception of young people, you can search for young people and politics. All the resulting articles contain two keywords. Normally, in the database, you can specify where these keywords are displayed in the article (title, summary, full text, etc.).

Alternatively spread the search by telling the database that all connected words are accepted. This is particularly useful when searching synonyms such as "death penalty" and "death penalty".

Therefore, if you enter the death penalty or the death penalty, the result will include any articles in the clause, but not necessarily both.

Do not narrow down your search by instructing the database to delete all subsequent terms from the search results. This is very helpful in the following situations.

You are interested in a very specific aspect of the topic (please clear the question you do not plan to write)

To exclude certain types of articles (eg book reviews are usually not useful when writing university papers)

In the example below, searching for sex education rather than abstinence will return only articles on gender, not just abstinence.

The definition of the q parameter of the search.list method has been updated The query term can use the Boolean NOT (-) operator to exclude videos associated with a particular search term. With this value, you can also use the Boolean OR (|) operator to search for videos associated with one of several search terms. The definition of the pageInfo.totalResults property returned in the API response to the search.list call has been updated This value is approximate and does not necessarily represent the exact value. The maximum value is 1,000,000. Do not use this value to create pagination links. Instead, use the nextPageToken and prevPageToken property values ​​to determine whether to display pagination links.

Boolean (or logical) operators are connectors that establish relationships between search terms. They tell the database how to search and execute the keywords. The name "Boolean" was regarded as the founder of a logical algebra after the 19th century British mathematician George Boole. The most common logical operators are AND, OR, NOT. The result includes the term "crime" or the term "theft", or two terms. If you use the Boolean operator "OR", at least one term is displayed for all results. In the search, arbitrary terms in arbitrary places in the project are searched in an arbitrary order. You can connect other similar terms using the logical operator "OR" to specify database options and continue to add equivalent terms connected with "OR".