How to select values from two different tables in SQL

Question

I have two tables in my SQL Server database. The first is Test1 and second is Test2. There is a column RegNo in both tables.

Now I

Answer 1

SELECT Test1.SurName, Test2.Class, Test2.Medium
FROM Test1
INNER JOIN Test2
ON Test1.RegNo = Test2.RegNo

please see a visual explanation of joins this is very helpful in learning joins.