Why are there logical operators in boolean search

[sadiksojib35]

The term "logical operators" only sounds scary. In fact, we use them every day - these are simple conjunctions, such as "and", "or", "but". They help structure speech and convey information better.

"To get to the city center, take the metro and the bus." From the sentence we understand that we will have to use both types of transport. The logical operator, the conjunction "and", helps us figure this out. "The distance can be covered by metro or bus" - here the conjunction "or" tells us that you can only get to the center by one of the two luxembourg telegram types of transport.

Here are the operators and syntax constructs used in boolean search :

And — the "and" operator — allows you to get only those results that contain both search words. Example: "programmer and junior" will show only programmer vacancies that mention the employer's interest in entry-level specialists in their description.
Or — the "or" operator. Also denoted by a vertical bar: "|". Returns results that contain at least one of the searched words. Example: the query "junior or middle" or "junior|middle" will return all vacancies that are looking for an entry-level or mid-level specialist.
Quotation marks are an operator that searches for exact wording. The query "dream job" will return all pages where this phrase appears in exactly this form.
Brackets are an operator that allows you to formulate complex logical queries. Brackets perform the same role as in mathematics: 2+2*2 = 6, and (2+2)*2 = 8. Example: the query "(junior or middle) and programmer" will show all programmer vacancies that contain a junior or middle level in the description.
The hyphen is an operator that allows you to exclude a word from the results. Example: in response to "junior programmer", the search engine will show all programmer vacancies, except those where the description mentions entry-level.
Site: — an operator that allows you to search a specific site. Example: the query "site:ya.ru "weather"" will show all mentions of the word "weather" on the site ya.ru. Important: a space is placed only after the site itself, but not after the operator.
Inurl: — a link search operator. Example: the query "inurl: "medic"" will show all sites that contain the word "medic" in their links.
An asterisk is an operator that allows you to make queries if there may be several missing words between known words. Example: the query "eighty * rubles" will not show variants that contain the phrase "eighty rubles", but will show variants with the phrase "eighty thousand rubles".
With the help of operators, you can find an interesting vacancy not only on special aggregators, but also, for example, on the company's website and social networks. The more sources of information a candidate can analyze, the higher his chances of finding a job.