Refer to the sample tables and data below. Tables:employees…

Refer to the sample tables and data below. Tables:employees (id(pk), name, job_code(fk)) — foreign key references jobs(code)jobs (code(pk), title, salary)mysql> SELECT * FROM employees;+—-+——————+———-+| id | name | job_code |+—-+——————+———-+| 1 | Captain Hook | 1 || 2 | Tiger Lily | 2 || 3 | Pocahontas | 2 |+—-+——————+———-+4 rows in set (0.00 sec)mysql> select * from jobs;+——+———+——–+| code | title | salary |+——+———+——–+| 1 | author | 100.50 || 2 | editor | 200.00 || 3 | manager | 150.00 |+——+———+——–+3 rows in set (0.00 sec) How many rows will the following commands return?  (a) SELECT name, salary FROM employees LEFT JOIN jobs ON job_code = code; [a](b) SELECT name, salary FROM employees RIGHT JOIN jobs ON job_code = code; [b]

Refer to the sample tables and data below. Tables:people (id…

Refer to the sample tables and data below. Tables:people (id(pk), firstname, lastname, zip(fk)) — foreign key references zip_code(zip)zip_code (zip(pk), city, state)mysql> select * from people;+—-+———–+———-+——-+| id | firstname | lastname | zip |+—-+———–+———-+——-+| 1 | Marty | McFly | 45001 || 2 | Jennifer | Parker | 33647 || 3 | Lorraine | McFly | 33647 || 4 | Biff | Tannen | 33647 || 5 | George | McFly | 07005 |+—-+———–+———-+——-+5 rows in set (0.01 sec)mysql> select * from zip_code;+——-+————+——-+| zip | city | state |+——-+————+——-+| 45001 | New York | NY || 07005 | New Jersey | NJ || 33647 | Tampa | FL || 33620 | Tampa | FL || 33765 | Clearwater | FL |+——-+————+——-+5 rows in set (0.01 sec) Fill in the blank with the word(s) that complete the command below, so that it returns the following result set:  +——-+——————+| zip | COUNT(firstname) |+——-+——————+| 45001 | 1 || 07005 | 1 || 33647 | 3 || 33620 | 0 || 33765 | 0 |+——-+——————+SELECT zip_code.zip, COUNT(firstname) FROM zip_code __________ people ON people.zip = zip_code.zip GROUP BY zip_code.zip;

Tables:tv_show (id(pk), name, network_id(fk), rating) — for…

Tables:tv_show (id(pk), name, network_id(fk), rating) — foreign key references network(id)network (id(pk), name)– id, rating, and network_id columns are INT. name columns are VARCHAR.mysql> SELECT * from tv_show;+—-+—————-+————+——–+| id | name           | network_id | rating |+—-+—————-+————+——–+|  1 | Raven’s Home   |         10 |      3 ||  2 | Friends        |         30 |      3 ||  3 | The Good Place |         30 |      3 ||  4 | Young Sheldon  |         20 |      4 ||  5 | Bluey          |         10 |      5 ||  6 | Duck Tales     |         10 |      5 ||  7 | Cheers         |         20 |      5 |+—-+—————-+————+——–+7 rows in set (0.00 sec)mysql> SELECT * FROM network;+—-+——–+| id | name   |+—-+——–+| 10 | Disney || 20 | CBS    || 30 | NBC    || 40 | Fox    |+—-+——–+4 rows in set (0.00 sec) Which network(s) does the following command return? If the command returns an empty set, please select only “empty set”. SELECT name FROM network WHERE id IN (SELECT network_id from tv_show WHERE rating = (SELECT MAX(rating) FROM tv_show));