Data Interview Qs - Total revenue by location

Total revenue by location

SQL Database Querying Joining Tables

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Hi,

Suppose you're given the following tables called 'orders' and 'order_info'. The table 'orders' shows revenue values for unique orders along with the associated channel ('online' or 'in_store') while the table 'order_info' shows the order's ID along with its location.

Table: orders

order_id	channel	date	month	revenue
1	online	2020-09-01 00:00:00	9	100
2	online	2020-09-03 00:00:00	9	125
3	in_store	2020-10-11 00:00:00	10	208
4	in_store	2020-08-21 00:00:00	8	80
5	online	2020-08-13 00:00:00	8	200
6	online	2020-08-16 00:00:00	8	210
7	in_store	2020-08-16 00:00:00	8	205
8	online	2020-10-11 00:00:00	10	215
9	online	2020-08-16 00:00:00	8	203
10	in_store	2020-09-01 00:00:00	9	400
11	online	2020-08-01 00:00:00	8	107

Table: order_info

order_id	location
1	NYC
2	NYC
3	LAX
4	LAX
5	SEA
6	AUS
7	LON
8	LAX
9	BLD
10	SEA
11	AUS

Using these tables, write a SQL query to return the total revenue by location, sorted by revenue in descending order. You can assume that each order has a unique revenue value, but you should be able to highlight the implications of ties in revenue values and how you would handle that.

Click here to view these tables in an interactive SQL fiddle.

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