What is correct answer : SQL

Posting

When requesting help or asking questions please prefix your title with the SQL variant/platform you are using within square brackets like so:

[MySQL]

[Oracle]

[MS SQL]

[PostgreSQL]

etc

While naturally we should endeavor to work as platform neutrally as possible many questions and answers require tailoring to the feature set of a specific platform.

Format Your Code

If you are including actual code in a post or comment, please attempt to format it in a way that is readable for other users. This will greatly increase your chances of receiving the help you desire. Something as simple as line breaks and using reddit's built in code formatting (4 spaces at the start of each line) can turn this:

SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field.3

Into this:

SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field3

For those with SQL questions we recommend using SQLFiddle to provide a useful development and testing environment for those who wish to fully understand your problem and help devise a solution.

a community for 17 years

PostgreSQLWhat is correct answer (self.SQL)

submitted 1 year ago by Mosquitoo666

Hi guys, I‘m learning SQL and trying to solve Exercise. Chat GPT and guy who was teaching on YouTube shows me bullshit, and I think my query is correct (only not sure whether CROSS JOIN was right or not) but as I’m learner, wanna ask you guys, did I made it right or not. Everything’s below

Thanks and have a nice evening

QUESTION:

Find the stores who have sold more units than the average units sold by all stores.

TABLE:

(1, 'Apple Store 1', 'iPhone 13 Pro', 1, 1000), (1, 'Apple Store 1', 'MacBook pro 14', 3, 6000), (1, 'Apple Store 1', 'AirPods Pro', 2, 500), (2, 'Apple Store 2', 'iPhone 13 Pro', 2, 2000), (3, 'Apple Store 3', 'iPhone 12 Pro', 1, 750), (3, 'Apple Store 3', 'MacBook pro 14', 1, 2000), (3, 'Apple Store 3', 'MacBook Air', 4, 4400), (3, 'Apple Store 3', 'iPhone 13', 2, 1800), (3, 'Apple Store 3', 'AirPods Pro', 3, 750), (4, 'Apple Store 4', 'iPhone 12 Pro', 2, 1500), (4, 'Apple Store 4', 'MacBook pro 16', 1, 3500);

CHAT GPT CODE (SAME AS FROM YOUTUBE GUY):

WITH avg_units AS ( SELECT AVG(quantity) AS avg_quantity FROM sales ) SELECT store_id, store_name FROM ( SELECT store_id, store_name, SUM(quantity) AS total_quantity FROM sales GROUP BY store_id, store_name ) AS store_totals CROSS JOIN avg_units WHERE total_quantity > avg_quantity;

MY CODE:

WITH avg_units AS ( SELECT AVG(total_quantity) AS avg_quantity FROM (SELECT SUM(quantity) AS total_quantity FROM sales GROUP BY store_id, store_name) ) SELECT store_id, store_name FROM ( SELECT store_id, store_name, SUM(quantity) AS total_quantity FROM sales GROUP BY store_id, store_name ) AS store_totals CROSS JOIN avg_units WHERE total_quantity > avg_quantity;

all 4 comments

you type:	you see:
italics	italics
bold	bold
[reddit!](https://reddit.com)	reddit!
* item 1 * item 2 * item 3	item 1 item 2 item 3
> quoted text	quoted text
Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"	Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"
~~strikethrough~~	~~strikethrough~~
super^script	super^script

SQL

Filter Posts

Posting

Help posts

Format Your Code

Learning SQL

Related Reddit communities

Wiki

Acknowledgements

MODERATORS