90. Customers Join Date

This advanced SQL exercise is part of the book: Advanced SQL – Practical Techniques and Use-Cases, which includes 100 day-to-day SQL challenges (and solutions), need-to-know advanced features, and key concepts.

An online education company manages a table that holds the details of the company’s customers. Each row in this table specifies: Serial number, customer name, city, and the date the customer joined the company.

CREATE TABLE customers
(c_id int identity(1,1),
c_name varchar(25),
city varchar(25),
join_date date)

To read more

UpScale Analytics is one of the largest platforms in the world for learning SQL by doing, consisting over 300 SQL exercises at different levels (including solutions), by topics, across over 100 different datasets. More…