Count Sales Reps By Customers

I have two tables, one for customers and one for our internal sales reps.

Each sales rep is assigned to a particular customer and I need to get a count, and listing, by sales rep, on who is assigned to what.

My customer table is:

Cust_Code
Cust_Name


My sales rep table has:

Cust_Code
Rep_Code
Rep_Name

My output would be like:

John Smith 10
Jane Smith 5
Joe Jones 11
etc.
I have

Code:

---

SELECT count(rep.rep_code), cust.cust_name
from Rep_Table rep, Customer_Table cust
group by cust_cust_name

---

But I get the exact same number for each sales rep, which I know is not correct.

What am I doing wrong?

SELECT rep.rep_code, count(*)
from Rep_Table rep
group by rep.rep_code