[Exmaple]-SQL query for distinct professors and courses

To retrieve a list of professors and their associated courses, you can use the following SQL query:

SELECT
    Professor.Name AS Professor_Name,
    Course.Name AS Course_Name
  FROM
    Professor
  INNER JOIN
    Course ON Professor.ID = Course.Professor_ID;

This query selects the name of each professor along with the name of the courses they teach, using an INNER JOIN between the Professor and Course tables based on the Professor's ID.

To retrieve a list of professor names and their associated courses for all courses outside of their departments without duplicate rows, you can use the following SQL query:

SELECT DISTINCT
    Professor.Name AS Professor_Name,
    Course.Name AS Course_Name
  FROM
    Professor
  INNER JOIN
    Course ON Professor.ID = Course.Professor_ID
  WHERE
    Course.Department_ID != Professor.Department_ID;

This query selects the distinct name of each professor along with the name of the courses they teach, but only for courses outside of their respective departments. It achieves this by using an INNER JOIN between the Professor and Course tables and filtering out courses where the Department ID of the course does not match the Department ID of the professor.

To retrieve a list of professor names and their associated courses, you can use the following SQL query:

SELECT
    Professor.Name AS Professor_Name,
    Course.Name AS Course_Name
  FROM
    Professor
  INNER JOIN
    Course ON Professor.ID = Course.Professor_ID;

This query selects the name of each professor along with the name of the courses they teach, using an INNER JOIN between the Professor and Course tables based on the Professor's ID.

To retrieve a list of professor names and their associated courses for all courses outside of their departments without duplicate rows, you can use the following SQL query:

SELECT DISTINCT
    Professor.Name AS Professor_Name,
    Course.Name AS Course_Name
  FROM
    Professor
  INNER JOIN
    Course ON Professor.ID = Course.Professor_ID
  WHERE
    Course.Department_ID != Professor.Department_ID;

This query selects the distinct name of each professor along with the name of the courses they teach, but only for courses outside of their respective departments. It achieves this by using an INNER JOIN between the Professor and Course tables and filtering out courses where the Department ID of the course does not match the Department ID of the professor.

To retrieve a list of professor names and their associated courses for all courses outside of their departments without duplicate rows, you can use the following SQL query:

SELECT DISTINCT
    Professor.Name AS Professor_Name,
    Course.Name AS Course_Name
  FROM
    Professor
  INNER JOIN
    Course ON Professor.ID = Course.Professor_ID
  WHERE
    Course.Department_ID != Professor.Department_ID;

This query selects the distinct name of each professor along with the name of the courses they teach, but only for courses outside of their respective departments. It achieves this by using an INNER JOIN between the Professor and Course tables and filtering out courses where the Department ID of the course does not match the Department ID of the professor.

If you want to retrieve a list of professor names and their associated courses for all courses outside of their departments without duplicate rows, you can follow these steps:

1. Understand the structure of your database tables. Ensure there are tables named Professor and Course, with appropriate columns such as Professor_ID, Name, and Department_ID.
2. Identify the relationship between professors and courses. Typically, this is established through a foreign key in the Course table referencing the ID of the professor who teaches the course.
3. Determine the criteria for selecting courses outside of their respective departments. This often involves comparing the Department_ID of the course with the Department_ID of the professor.
4. Write a SQL query that selects the distinct name of each professor along with the name of the courses they teach, but only for courses outside of their respective departments. Use a JOIN operation between the Professor and Course tables, and apply a WHERE clause to filter out courses where the Department_ID of the course does not match the Department_ID of the professor.
5. Ensure that the output of the query contains two columns: Professor.Name and Course.Name.
6. Execute the query against your database and retrieve the results.

Here's the SQL query to achieve this:

SELECT DISTINCT
    Professor.Name AS Professor_Name,
    Course.Name AS Course_Name
  FROM
    Professor
  INNER JOIN
    Course ON Professor.ID = Course.Professor_ID
  WHERE
    Course.Department_ID != Professor.Department_ID;

This query selects the distinct name of each professor along with the name of the courses they teach, but only for courses outside of their respective departments.

If you're looking for a SQL query to return a list of professor names in a HackerRank solution, you might want to retrieve this information from a database table named 'professors'. Assuming there is a column named 'name' in the 'professors' table, the SQL query would be:

SELECT name
  FROM professors;

This query selects all the names of professors from the 'professors' table.

If you need to list the course names in a HackerRank solution, assuming the course names are stored in a table named 'courses' with a column named 'name', you can use the following SQL query:

SELECT name
  FROM courses;

This query retrieves all the course names from the 'courses' table.