EasySQL challenge #37WHERE

Large Orders

Find orders with item_count greater than 5.

The challenge runs on the SQLabHub practice database (SQLite) and uses the orders table. You can solve it in the browser, with nothing to install.

Solve This SQL Challenge

The task

Find orders with item_count greater than 5.

A correct answer returns 23 rows with 10 columns: id, user_id, total, discount, item_count, status, order_date, shipped_date, shipping_city, shipping_country.

Tables used in this challenge

`orders` 200 rows

id INTEGER (PK) · user_id INTEGER · total REAL · discount REAL · item_count INTEGER · status TEXT · order_date TEXT · shipped_date TEXT · shipping_city TEXT · shipping_country TEXT

First 3 rows of the orders table
id	user_id	total	discount	item_count	status	order_date	shipped_date	shipping_city	shipping_country
1	43	2638.11	0.25	3	cancelled	2024-04-24	NULL	Los Angeles	USA
2	8	2947	0.19	5	delivered	2024-03-15	2023-04-09	Chicago	USA
3	136	683.24	0.08	2	delivered	2023-02-15	2023-07-10	Los Angeles	USA

The first rows of each table are shown. See how all the tables relate on the database schema page.

Expected output

Expected output of the challenge
id	user_id	total	discount	item_count	status	order_date	shipped_date	shipping_city	shipping_country
33	124	4487.94	0.01	6	shipped	2023-09-23	2023-09-20	Dallas	USA
39	10	1264.93	0.19	6	delivered	2023-12-15	2024-04-25	Jacksonville	USA
43	126	4063.2	0.21	6	shipped	2023-08-20	2023-09-04	San Francisco	USA
55	37	1087.1	0.24	6	processing	2023-06-13	NULL	Austin	USA
56	87	4915.01	0.18	6	delivered	2024-11-17	2023-07-12	Jacksonville	USA

First 5 of 23 rows. This is the output of the model solution on the practice database. The task does not fix a sort order, so your rows may come back in a different order.

What you practise

Returning every column of a table with SELECT *
Filtering rows with a WHERE condition

Hint and approach

Try the challenge first. Open these only when you need them.

Show the hint

Use WHERE

Show the step-by-step approach

How the model solution is built, in the order the database evaluates it:

Read from the orders table.
Filter in WHERE: keep the rows where item_count is greater than 5.
Return every column with SELECT *.

Model solution

Checking your session…

What to watch for

WHERE. WHERE is evaluated before the SELECT list, so it cannot use a column alias defined there or the result of an aggregate.
SELECT *. SELECT * is fine for exploring, but its output changes whenever a column is added to the table. Queries that feed a report should name their columns.