Sams Teach Yourself SQL in 10 Minutes (Fifth Edition) includes challenges at the end of some lessons. Solutions to the challenges are presented here. Just keep in mind that there is rarely one solution to a SQL challenge, so if your solutions look different but produce the desired result, that’s ok.
Add a web site column (vend_web) to the Vendors table. You’ll want a text field big enough to accommodate a URL.
ALTER TABLE Vendors ADD vend_web CHAR(100);