Problem 3: Friends and Relations Select/write a solution to each of these problems using relational and logical operators. Do not use any if statements! Rule 1: If I see a friend, I greet them. (Friends can be seen more than once in the same input.) Rule 2: If a person doesn't have the name of a friend, I do not greet them. Rule 3: The input consists of the names of the people I meet represented as String data Note: All output should be true if and only if a certain condition occurs. Your code must return true for all situations where that condition occurs, not just some of them. Similarly, your code must return false for all situations where the condition does not occur. For example, if I have two friends named "Abby" and "George", I would greet both of them if I saw "Abby" first, then "George". But, I would also greet them both if I saw "George" first, then "Abby". My code would need to print true in both of those situations not just one of them. odd number of people. (true if 1, 3, or 5 people, false otherwise) boolean oddFriends oddFriends = (input() EQ "David" AND input() EQ "David" AND input() EQ "David" AND input() EQ "David" AND input() EQ "David") print oddFriends boolean one, three, five one =input() == "David" two =input() == "David" AND input() == "David" three = input() == "David" AND input() == "David" AND input() == "David" print one or two or three boolean oddFriends oddFriends = (input() EQ "David" OR input() EQ "David" OR input() EQ "David" OR input() EQ "David" OR input() EQ "David") print oddFriends boolean oddFriends oddFriends = (input() EQ "David" XOR input() EQ "David" XOR input() EQ "David" XOR input() EQ "David" XOR input() EQ "David") print oddFriends

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SQL

SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.  

Queries

A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.