You are given a programming problem and its implementation. Analyze the problem and implementation and explain the algorithm and approach used to solve the problem. Table: Person | Column Name | Type | | personId | int | | lastName | varchar | | firstName | varchar | personId is the primary key column for this table. This table contains information about the ID of some persons and their first and last names. Table: Address | Column Name | Type | | addressId | int | | personId | int | | city | varchar| | state | varchar | addressId is the primary key column for this table. Each row of this table contains information about the city and state of one person with ID = PersonId. Write an SQL query to report the first name, last name, city, and state of each person in the Person table. If the address of a personId is not present in the Address table, report null instead. Return the result table in any order. Implementation: select FirstName, LastName, City, State from Person left join Address on Person.PersonId = Address.PersonId ;

The given problem is to retrieve the first name , last name , city , and state of each person in the Person table . If the address of a person Id is not present in the Address table , report null instead . \n \n The implementation of the problem is done using a SQL query that performs a left join between the Person and Address tables on the common column of person Id . The left join ensures that all rows from the Person table are included in the result set , even if there is no matching row in the Address table . \n \n The query select s the First Name , Last Name , City , and State columns from the joined tables . If there is no matching row in the Address table for a person , the query returns null for the City and State columns . \n \n The result table is returned in any order . </s>