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 ;

Thank you for providing the programming problem and its implementation . I ' m here to help you analyze the algorithm and approach used to solve the problem . \n The given SQL query is designed to report the first name , last name , city , and state of each person in the Person table . Here ' s a step - by - step break down of the query : \n 1 . ` select First Name , Last Name , City , State `: This line selects the columns we want to retrieve from the table . \n 2 . ` from Person left join Address `: This line joins the Person and Address tables based on the ` Person Id ` column in both tables . \n 3 . ` on Person . Person Id = Address . Person Id `: This line spec ifies the join condition , which matches the ` Person Id ` column in the Person table with the ` Person Id ` column in the Address table . \n By using a left join , the query will return all the rows from the Person table , and the matching rows from the Address table . If there is no match in the Address table for a particular person , the ` City ` and ` State ` columns will be null . \n The algorithm used in this query is a simple join , which comb ines the data from two tables based on a common column . In this case , the join is a left join , which returns all the rows from the left table ( Person table ) and the matching rows from the right table ( Address table ). \n Over all , the query is well - struct ured and easy to understand . It effectively joins the two tables based on the ` Person Id ` column and returns the desired columns from both tables . \n If you have any further questions or need help with anything else , feel free to ask ! </s>